1 23

Neotropical Entomology ISSN 1519-566X Neotrop EntomolDOI 10.1007/s13744-012-0033-0

The Tannea Blackwelder Species ofEcuador with Description of New Species(Coleoptera: Staphylinidae: Osoriinae)

Ulrich Irmler

1 23

Your article is protected by copyright and

all rights are held exclusively by Sociedade

Entomológica do Brasil. This e-offprint is

for personal use only and shall not be self-

archived in electronic repositories. If you

wish to self-archive your work, please use the

accepted author’s version for posting to your

own website or your institution’s repository.

You may further deposit the accepted author’s

version on a funder’s repository at a funder’s

request, provided it is not made publicly

available until 12 months after publication.

SYSTEMATICS, MORPHOLOGY AND PHYSIOLOGY

The Tannea Blackwelder Species of Ecuador with Descriptionof New Species (Coleoptera: Staphylinidae: Osoriinae)

U IRMLER1

Institute for Ecosystem Research, Univ of Kiel, Germany

AbstractKeywords

Altitudinal distribution, neotropics,new species, zoogeography

CorrespondenceUlrich Irmler, Institute for EcosystemResearch,Univ of Kiel, Olshausenstrasse 40, 24098 Kiel,Germany; uirmler@ecology.uni-kiel.de

Edited by Takumasa Kondo – CORPOICA

Received 14 August 2011 and accepted 25March 2012

* Sociedade Entomológica do Brasil 2012

Two new species of the genus Tannea Blackwelder from Ecuador,Tannea hermani n. sp. and Tannea bellavistae n. sp. are herein de-scribed, and a complete list of records of all Tannea species found inEcuador is provided together with a key to the species. Additionally, thegeographic distribution of the Tannea species of Ecuador and theiraltitudinal distribution are discussed.

Introduction

The genus Tannea was formerly placed as subgenus to thegenus Nacaeus by Blackwelder (1952). Together with thegenera Lispinus Erichson (1840), Neolosus Blackwelder,Liberiana Blackwelder (1942), and Lispinuncus Irmler(2005b), they form the subtribe Lispinina of the tribeThoracophorini (Herman 2001). Later, it was elevated togenus level by Irmler (2003), because the spermathecadiffers from all other genera of the subtribe Lispinina. Incontrast to other genera in the tribe Thoracophorini, thesubtribe Lispinina forms a group of clearly related genera(Irmler 2010b). The species of the genus Tannea are char-acterized by prominent eyes, usually prolonged antennaein males, a margined prosternal process, and a spermathe-ca with a pear-shaped bursa and a straight ductus. Al-though prolonged antennae and prominent eyes alsooccur in a few species of the genus Nacaeus, the shapeof the spermatheca is unique to the subtribe as all othergenera have a global bursa and a hook-like ductus.

In Ecuador, intensive collections on Staphylinidae havebeen made in the last decades by scientists from differentcountries, which have resulted in a relatively rich faunisticknowledge including the staphylind subfamily Osoriinae. Thisis highly important because Ecuador is one of the mostspecies-rich South American countries due to the extremelydifferent biomes from lowland rainforests in the East to high

tropical alpine habitats in the centre and dry habitats in theWest. Furthermore, Ecuador includes several endemicregions of tropical forests, e.g., the Choco region in the Westand the Napo region in the East (Haffer 1969).

In a study of Osoriinae from the collections of Lee Herman(American Museum of Natural History, New York) and theauthor′s own collection at Bellavista in 2009 (Pichincha), twoundescribed species of the genus Tannea were found. Intotal, a number of 13 species are known from Ecuadorincluding the two undescribed species which are hereindescribed. All records of the genus Tannea from Ecuadorcollected from different locations and by various collectorsin the last two decades are listed, and a key to the species ofthe country is provided. A short discussion concerning thegeographic distribution of the species of Tannea in Ecuador isgiven, with emphasis on endemic species.

Material and Methods

The material used in the current study is deposited in thefollowing institutions and private collections: American Mu-seum of Natural History, New York, USA (AMNH), CanadianNational Collections, Ottawa, Canada (BSRI), Institut Royaldes Sciences Naturelles de Belgique, Brussels, Belgium(IRSNB), Snow Entomological Collections of the Natural

Neotrop EntomolDOI 10.1007/s13744-012-0033-0

Author's personal copy

History Museum of the University of Kansas, Lawrence,USA (KU), National Museum, Prague, Czech Republic(NHMP), Private collection of J. Janák, Prague, CzechRepublic (JC), and Private collection of U. Irmler, Plön,Germany (UIC).

For measurements of total length, the inter-segmentalspace of the abdominal segments were considered. Thelengths of individual tagma were determined along themidline, their widths at the widest part of the respectivetagma. For the photographs of the species, a Makroskop M420 (Wild Herbrugg) was used in combination with a digitalcamera (Leica EC3).

Results

Description of new species

Tannea bellavistae n. sp.(Figs 1.1A–F, 2A–C)

Material. Holotype: Ecuador: male, Nanegalito, BellavistaCloud Forest Reserve (78°49.47′W; 00°00.37′S) under bark,3.viii.2009, leg. U. Irmler (UIC). Paratype: female, with thesame data as the holotype (UIC).

Diagnosis. This species can be easily identified from otherspecies by its large size, about 4 mm in length, by theconspicuous coloration of the light red pronotum and thedistinctly darker head and elytra. Similarly, large speciesare Tannea magna Irmler (4.2–4.4 mm) (Irmler 2005a, b),Tannea brevicollis Fauvel (4.0–4.3 mm) (Fauvel 1865), andTannea fabacicolor Irmler (3.9–4.1 mm) (Irmler 2003). Ely-tral microsculpture of T. brevicollis and T. fabacicolor isisodiametric, whereas it is at least partly longitudinallyreticulate in T. magna and T. bellavistae n. sp. It mostlyresembles the Colombian species Tannea punctinota Irmler(Irmler 2005a, b) in its overall shape and habit but isdistinctly larger (T. punctinota 3.9 mm long). The smalldifferences between male and female antennae and theobtuse emargination in the posterior half of the pronotumare also found in T. punctinota. In contrast to T. punctinota,the elytra of T. bellavistae n. sp. are longer than wide,whereas they are quadrate in T. punctinota. Moreover,the inner structures of the aedaeagi are different. In T.bellavistae, the endophallus forms one torsion whereasthere are two torsions in T. punctinota.

Description. Length, 4.3 mm; coloration, black; pronotumlight red; legs and antennae light brown.Head. 0.45 mm long, 0.65 mm wide; with eyes distinctlyprominent; shape of clypeus trapezoid; punctation fine andmoderately sparse; distance between punctures on average

twice as wide as diameter of punctures; on some areas evensparser; two setiferous supraocular punctures; one setifer-ous puncture in front of eyes and four setiferous puncturesforming a transverse rectangle on dorsum; microsculptureisodiametric; distinct, but fine; surface moderately matte.

Antennae of male distinctly longer than length of headand pronotum combined; antennae of female shorter thanlength of head and pronotum combined; second antenno-mere oblong and only slightly shorter than conical thirdantennomere; following four antennomeres distinctly lon-ger than wide; antennomeres eight to ten more or less aswide as long; all antennomeres with long setae; antenno-meres one to five more or less glabrous; antennomeres sixto 11 pubescent.Pronotum. 0.60 mm long, 0.80 mm wide; widest near themiddle; slightly narrowed to indistinct obtuse anteriorangles; obtusely emarginate in posterior half in front ofposterior angles, posterior angles rectangular; several setif-erous punctures along apical and lateral edge; depressionsat posterior angles indistinct; punctation distinctly deeperthan that of head; irregularly dense; on average distancebetween punctures slightly wider than diameter of punc-tures; near midline denser than near lateral edges; foursetiferous punctures in a transverse line in anterior half;microsculpture longitudinally reticulate; surface slightlymore shiny than that of head.Elytra. 1.00 mm long, 0.92 mm wide; with similar punctationthan that of pronotum, but on average slightly sparser;microsculpture partly net-like, partly longitudinally reticulate.Aedeagus. Very slender with fine spiral endophallus con-taining one torsion only; paramera also very slender with-out transparent lobe or hooks at apex.

Etymology. The species name is derived from the name ofthe locality “Bellavista Cloud Forest Reserve” where thespecies was collected.

Tannea hermani n. sp.(Figs 1.2A–F, 2D–F)

Material. Holotype: Pichincha: Alluriquin, Tinalandia (78°58.60′W; 00°19.00′S), litter near stream, 900 m asl, male,20.v.1993, leg. Lee Herman (AMNH); Paratypes, 26 speci-mens with same data as for the holotype; Alluriquin, 3.3–5.3 km SW Tinalandia, road to cooperativa, litter nearstream, five females, 20.v.1993, leg. Lee Herman; SantoDomingo de los Colorados (79°10′W, 00°14'S), 40 km NW,light trap, two males, two females, 400 m asl, 19.x.1988,leg. Lee Hermann (AMNH, UIC).

Diagnosis. Tannea hermani n. sp. is certainly closely relat-ed to Tannea parallelonota, Tannea picata, and Tanneapulcher due to the distinctly elongate antennae of males,

Irmler

Author's personal copy

1A 1B

1C

1D

1E

1F 2A

2B

2C

2D2E

2F

Fig 1 1.1 Tannea bellavistae. 1.2 Tannea hermani; 1.1) fore-body (A), male antenna (B), female antenna (C), aedeagus in lateral (and dorsal in 1.2)aspect (D), paramera (E), last abdominal tergite (F) (scale bar: in A – C: 1 mm, in D – F: 0.1 mm).

The Tannea Blackwelder Species of Ecuador

Author's personal copy

short antennae of females, more or less quadrate elytra,longitudinal microsculpture, and presence of the transpar-ent lobe of the paramera. It can be separated from T.parallelonota by its smaller size. A separation from T.picata and T. pulcher is nearly impossible without dissec-tion of the aedeagus. On average, the microsculptureseems to be less distinct than in the two other species.The main differences can be found in the structure of theaedeagus. The transparent lobe of the paramera is small asin T. pulcher, whereas it is large in T. picata. The thick singletorsion of the endophallus is specific in T. hermani n. sp.Both T. picata and T. pulcher have either three torsions oran extremely narrow endophallus, respectively.

Description. Length, 2.8 mm. Coloration, fore-body darkbrown; abdomen brown with last tergites lighter brown;legs and antennae light brown.Head. 0.35 mm long, 0.50 mm wide; eyes prominent; fore-head in front of eyes expanding in width to posterior anglesof clypeus; wider than neck; punctation distinct; distancebetween punctures on average as wide as or slightly widerthan diameter of punctures; with two setiferous supraocularpunctures; four setiferous punctures forming a trapezoidwith narrower edge in front of eyes, and four setiferouspunctures in anterior margin of clypeus; microsculptureweak and longitudinally reticulate; surface shiny.

Antennae of male as long as length of fore-body; antennallength of female slightly longer than head and pronotum

combined; second oval antennomere half as long as conicalthird; following four antennomeres increasing in length; sev-enth antennomere nearly twice as long as fourth; all anten-nomeres with long yellow setae; antennomeres four to 11pubescent.Pronotum. 0.40 mm long, 0.48 mm wide; widest nearmiddle; smoothly narrowed to indistinct anterior angles;emarginate in front of posterior angles; posterior anglesnearly rectangular; depressions at posterior angles distinct;several setiferous punctures along anterior and lateraledges and two setiferous punctures at anterior half of disc;deeply and densely punctate; a narrow midline impunc-tate; adjacent to midline with denser punctation than nearlateral margin; on average distance between punctures aswide as diameter of punctures; microsculpture longitudi-nally reticulate; surface shiny.Elytra. 0.63 mm long, 0.63 mm wide; with similarly deepand dense punctation as that of pronotum, but partlydenser, in particular, on a line between shoulders andposterior edge.Aedeagus. Paramera slightly longer than central lobe andwith a narrow transparent lobe at apex; with relativelythick spiral endophallus containing a large torsion and asecond short torsion.

Etymology. The specific name is derived from the collec-tor’s name Lee Herman from the American Natural HistoryMuseum who collected the species.

A B C

D E F

Fig 2 Tannea bellavistae headand prontum (A), elytra (B),punctation and microsculptureof elytra (C); Tannea hermanihead and pronotum (D), elytra(E), punctation andmicrosculpture of elytra (F)(scale bar in A – E : 0.5 mm, inF: 0.25 mm).

Irmler

Author's personal copy

Records of described species of Ecuador

Tannea brevicollis (Fauvel, 1865)Lispinus brevicollis Fauvel, 1865: 56Tannea brevicollis (Fauvel, 1865) (Irmler 2003: 89)(Fig 3A)

Chimborazo: 1,000 m asl, one specimen, viii.1897, leg.Rosenberg (IRSNB); Pichincha: old Quito-Station Domingoroad, Chiriboga (78°46.13′W; 00°13.35′S), leaf litter,2,200 m asl, one specimen, 13.vi.1982, leg. H. Frania (BSRI);Napo: Baeza, 22 km S, 2 km S Oritoyacu (77°47.51′W; 00°38.44′S), 1,500 m asl, six specimens, 4.iii.1976. leg. J.M.Campbell (BSRI, UIC); 2,150 m asl, one specimen,6.xi.1999, leg. Z.H. Falin (KU); Sarayacu (77°46.55′W; 00°39.19′S), 52 km N Tena, under bark of log, 2,100 m asl,seven specimens, 24.v.1993, leg. L. Herman (AMNH).

Tannea ecuadoriensis Irmler, 2005Tannea ecuadoriensis Irmler, 2005: 153(Fig 3B)

Pichincha, 2,700 m asl, 19 km NW Nono (78°31.05′W; 00°05.20′N), six specimens, 1.iii.1976, leg. J.M. Campbell (BSRI,UIC); 15 km E Tandapi (78°38.32′W; 00°26.15′S), in moss litter,one specimen collected by Berlese extraction, 2,300 m asl,7.vi.1976, leg. J. Peck (BSRI); Nanegalito, in cloud forest litter,2,150 m asl, one specimen, 28.x.1999, leg. R.M. Brooks (KU);Maquipucuna (78°37.57 W, 00°07.34 N), Biological Station,1,200 m asl, one specimen collected by flight intercept trap,29.x.1999, leg. Z.H. Falin (KU); Nono (78°39.19 W, 00°01.58 S), one specimen collected by flight intercept trap,26.x.1999, leg. Z.H. Falin (KU).

Tannea fersa Irmler, 2003Tannea fersa Irmler, 2003: 90(Fig 3C)

Pichincha: Rio Palenque, 47 km S Santo Domingo, leaflitter, nine specimens, 28.ii.1976, leg. J.M. Campbell (BSRI,UIC); 50 km NE Quito in Maquipucuna Forest Reserve,banana litter, 1,300 m asl, one specimen, 23.xii.1991,leg. C.E. Carlton (KU); San Francisco de las Pampas, RioEsmeraldas, litter and debris, eight specimens, 14.v.1993,leg. L. Herman (AMNH).

Tannea leticiae Irmler, 2005Tannea leticiae Irmler, 2005: 152(Fig 3D)

Sucumbios: Limoncocha, tree fungi, one specimen, 22.vi.1976,leg. Peck (BSRI); Sacha Lodge, 270 m asl, one specimen byflight intercept trap, 22.ii.1994, leg. Hibbs (KU); Napo: Puerto

Napo, 21 km E., Jatunsacha Biological Station, one specimen,20.vii.1994, leg. Genier (KU); Pastaza: Santa Clara, 1,000m asl,13 specimens, 27.xi.2004, leg. Banar (JC, UIC).

Tannea magna Irmler, 2005Tannea magna Irmler, 2005: 170(Fig 3E)

Napo: Baeza, 4.2 km S, on road to Tena, 2.9 km W onpipeline access road, 2,150 m asl, nine specimens, 6.xi.1999and 7.xi.1999, leg. Z.H. Falin (KU, UIC).Tannea parallelonota Irmler, 2003Tannea parallelonota Irmler, 2003: 93(Fig 3F)

Napo: Baeza, 1,500 m asl, four specimens, 5.iii.1976, leg.J.M. Campbell (BSRI, UIC); 2 km S. Oritoyacu, 1,500 m asl,five specimens, 4.iii.1976, leg. J.M. Campbell (BSRI, UIC);15 km W Cosanga, Reserva Sierra Azul, rotting cut andmontane evergreen forest, 2,350 m asl, 26 specimens,5.xi.1999, leg. Z.H. Falin (KU, UIC); Cosanga, montane ever-green forest litter, 2,250 m asl, 13 specimens, 6.xi.1999, leg.Anderson (KU, UIC); 2.5 km W Cosanga, montane ever-green forest, 2,150 m elevation, seven specimens,5.xi.1999, leg. Anderson (KU, UIC); 1.5 km N Cosanga onroad, to Sierra Azul, 2,150 m asl, one specimen collected byflight intercept trap, 7.xi.1999, leg. Z.H. Falin (KU); 6.1 kmSW Cosanga, Antisana Reserve Road, montane evergreenforest, 2,250 m elevation, three specimens, 6.xi.1999, leg.Anderson (KU); El Chaco, 4.8 km NW on road to Oyacachi,montane evergreen forest, two specimens, 7.xi.1999, leg.Anderson (KU).

Remarks. Tannea parallelonota seems to be a variablespecies. The shape of the pronotum of the Central Amer-ican specimens differs from the Ecuadorian specimens. Thepronotum of the Ecuadorian specimens is wider than in theCentral American specimens and the constriction near thefront angles is absent. However, punctation, microsculp-ture, and, in particular, the structure of the aedeagus showno differences.

Tannea picata Irmler, 2003Tannea picata Irmler, 2003: 94(Fig 3G)

Napo: Baeza: 15 km S. on Road to Tena (77°51.4′W;00°35.28′S), 1,800 m asl, primary forest litter, fivespecimens, 28.iv.1990, leg. C.E. Carlton (KNHM, UIC);Pichincha: Santo Domingo de los Colorados, 16 km ETinalandia (78°54′W; 00°19′S), Pedro Vincente Maldo-nado (79°03.21 W, 00°06.44 N), under bark, one spec-imen, 27.iii.1999, leg. R.W. Brooks (KU).

The Tannea Blackwelder Species of Ecuador

Author's personal copy

Fig 3 Fore-bodies of Tannea brevicollis (A), Tannea ecuadoriensis (B), Tannea fersa (C), Tannea leticiae (D), Tannea magna (E), Tanneaparallelonota (F), Tannea picata (G), Tannea pulcher (H), Tannea salasi (I), Tannea tenella (J), and Tannea punctinota (K) (scale bar: 0.5 mm).

Irmler

Author's personal copy

Tannea pulcher (Bernhauer, 1942)Lispinus pulcher Bernhauer, 1942: 2Tannea pulcher (Bernhauer, 1942) (Irmler 2003: 95)(Fig 3H)

Napo: Baeza (77°53′W; 00°28′S), 1,000 m asl, two speci-mens, 4.v.1976, leg. J.M. Campbell (BSRI); 2.4 km W Archi-dona, (77°48′W; 00°54′S), dense lowland vegetation onbank of stone, one specimen, 21.xi.2006, leg. Fikácek;Sucumbios: Sacha Lodge (76°16′W; 00°26 S), 270 m asl,Malaise trap, two specimens, 25.vii.1994, leg. P. Hipps (KU);Pichincha: Nanegalito (78°41.8′W; 00°00.32′S), BellavistaReserva, cloud forest, fungus logs, one specimen,30.x.1999, leg. Z.H. Falin (KU).

Tannea punctinota Irmler, 2005Tannea punctinota Irmler, 2005: 160(Fig 3K)

Pichincha: Quito, 50 km NW in Maquipucuna Cloud ForestReserve (79°08′W; 00°09′N), fungusy log, 1,700 m asl, twospecimens, 21.xii.1991, leg. C.E. Carlton (KU).

Tannea salasi Irmler 2003Tannea salasi Irmler, 2003: 97(Fig 3I)

Chimborazo: without further information, one specimen,viii.1898, leg. Rombas (FMNH); two specimens, viii.1897,leg. Rosenberg (IRSNB); Pichincha: Rio Palenque (79°03′W;01°03′S), 47 km S Santo Domingo de los Colorados, 95 speci-mens, 28.ii.1976, leg. J.M. Campbell (BSRI, UIC); Tandapi (78°38.32′W, 00°26.15′S), Cornejo Astorga, 2,000 m asl, onespecimen, 25.vi.1975, leg. J. Peck (BSRI); Pedro VincenteMaldonado (79°03′21′′W, 00°06′44′′N), under bark, 530 masl, one specimen, 29.iii.1999, R.W. Brooks (KU); NAPO:4 km W Papallacta (78°05.5′W; 00°22.11′S), 3,200 m asl,one specimen, 2.iii.1976, leg. J.M. Campbell (BSRI).

Tannea tenella (Erichson, 1840)Lispinus tenellus Erichson, 1840: 23Tannea tenella (Erichson, 1840) (Irmler 2003: 97)(Fig 3J)

Pastaza: without further data, one specimen, 1.v.1931, leg.B. Malkin (FMNH); Santa Clara (77°52.32′W; 01°16.17′S),1.6 km SEE, dense lowland forest vegetation on bank ofstony river, shaded, leaf litter, 660 m asl, sifted, threespecimens, 17.xi.2006, leg. Fikácek (NHMP); Napo: Archi-dona (77°48′W; 00°54 S), 4.1 km W, dense secondary forestmargin, near banks of muddy stream, wet leaf litter, 650 masl, sifted, one specimen, 19.xi.2006, leg. Fikácek (NHMP);Baeza (77 °53.58′W; 00 °28.21′S), 1.5 km SW, dense

secondary vegetation on steep slope (Cecropia, Araceae)thick layer of leaves with roots close to small muddy river,leaf litter, sifted, 1,850 m asl, two specimens, 13.xi.2006,leg. Fikácek (NHMP).

Key to the species of Ecuador

For the identification of the species, the microsculpture ofthe pronotum and the elytra are the main features. Assexual dimorphism is usual in the genus, a male and afemale should be at least available for the study, becausethe length difference between male and female antennaeis important. Nevertheless, in a few cases, identification ofthe species may require a section of the aedeagus.

1. Bicolored, pronotum light red, Head, elytra, and ab-domen black, 4.3 mm...........T. bellavistae Irmler n. sp.Unicolored, either dark, black or dark reddish ..........2

2. Species longer than 4 mm, black.................................3Species not longer than 3.8 mm, blackish or darkreddish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3. Microsculpture of elytra longitudinally reticulate, sur-face slightly shiny, head broad, eyes semi-circularlyprominent, clypeus with scaly isodiametric microsculp-ture with matte surface.........................T. magna IrmlerMicrosculpture of elytra distinctly netlike, sur-face matte, head less broad, eyes prominent,but not in a semi-circular shape, clypeus with iso-diametric microsculpture, but with slightly shinysurface.............................................T. brevicollis (Fauvel)

4. Male antennae distinctly elongate, as long as or nearlyas long as fore-body, penultimate antennomeres longerthan wide, in some species twice as long as wide,posterior angles of pronotum rectangular....................8Male antennae not elongate, not much longer thanhead and pronotum combined, penultimate antenno-meres shortly longer than wide or quadrate, posteriorangles of pronotum rectangular or obtuse...................5

5. Pronotum with distinct emargination in front of rectan-gular posterior angles, widest part of pronotum just infront of emargination, straightly narrowed anteriad,3.2–3.5 mm..................................T. ecuadoriensis IrmlerPronotum slightly emarginate in front of posteriorangles, posterior angles not distinctly rectangular,pronotum in anterior half parallel or smoothlycurved......................................................................6

6. Smaller than 3.0 mm, penultimate antennomeres ofmale wider than long.....................................................7Larger, 3.2–3.5 mm long, penultimate antennomeres ofmale quadrate..................................T. punctinota Irmler

7. Punctation of pronotum and elytra coarse, in particu-lar, on pronotum punctures elongate and partly

The Tannea Blackwelder Species of Ecuador

Author's personal copy

coriaceous, microsculpture longitudinally reticulate,but weak, surface shiny, paramera with transparentlobe.....................................................T. leticiae IrmlerPunctation of pronotum and elytra fine, micro-sculpture distinct, longitudinally reticulate, surfaceonly slightly shiny, paramera with two apicalhooks..........................................T. tenella (Erichson)

8. Smaller than 2.5 mm, with extremely weak depressionsat posterior angles of pronotum.................T. fersa IrmlerAt least 3.0 mm long, depressions at posterior angles ofpronotum distinct..............................................................9

9. Microsculpture of elytra and pronotum distinct and net-like, surface matte, 2.9–3.2 mm.................T. salasi IrmlerMicrosculpture of pronotum weak, longitudinally reticu-late, surface shiny, 2.8–3.7 mm......................................10

10. Larger, fore-body at least 1.8mm long, vertex of headwithisodiametric microsculpture..............T. parallelonota IrmlerSmaller, fore-body not longer than 1.5 mm, vertex ofhead with netlike or longitudinal microsculpture, surfaceshinier, three species difficult to differentiate withoutgenital analysis...................................................................11

11. Elytra without indistinct traces of longitudinal micro-sculpture, punctures large, spiral endophallus broadwith one torsion........................T. herman Irmler n. sp.Elytra with distinct longitudinally reticulate microsculp-ture, punctation finer, endophallus weaker with one ormore torsions....................................................................12

12. Endophallus with three torsions................T. picata IrmlerEndophallus extremely weak with one tor-sion..........................................T. pulcher (Bernhauer)

Fig 4 Distribution of Tannea species recorded from Ecuador.

Irmler

Author's personal copy

Discussion

At present, fewer numbers of species have been recordedfrom Ecuador compared with Costa Rica, 13 species fromEcuador and 16 species from Costa Rica (Irmler 2007). Thismight be referred to the more intensive and longer historyof investigation in Costa Rica, in particular, by North-American scientists (e.g., Janzen 1983). Large parts of Ecua-dor in the North, the South, and the lowland western areaswere not or only scarcely represented in the collections.Only the Central region with the provinces of Pichincha,Chimborazo, Napo, and Pastaza were frequently collected.

In Costa Rica, most species of the genus Tannea werefound in higher altitudes of sub-montane, montane, orcloud forests. This is also true for Ecuador. From the 13species recorded from the country, only six species werefound in localities lower than 1,000 m. These are T. her-mani n. sp., T. fersa, T. leticiae, T. picata, T. salsi, and T.pulcher. Four of them also occurring in Costa Rica, i.e., T.fersa, T. picata, T. salasi, and T. pulcher, were classified alsoas sub-montane or ubiquitous species in Costa Rica. Theattribution to altidudinal preferences of Tannea species byIrmler (2007) is supported by the Ecuadorian records,because here, in addition to the fore-named species, T.brevicollis and T. parallelonota were also found only inregions between 1,000 m and 2,600 m asl.

Four species have been only recorded from Ecuador andseem to be endemic to the country or adjacent areas. Theseare the new species T. hermani and T. bellavistae that havebeen recorded only from the western slope of the Andeanrange (Fig 4). Tannea magna seems to occur only on theeastern slope of the Andean range, whereas T. ecuadoriensishas been recorded from both slopes between 1,200 and2,700 m asl. Among these species, T. hermani sp. n. occursin the lowest elevations between 400 and 900 m asl. Thenew species T. bellavistae sp. n. might be attributed to thecomplex of endemic species of the Choco region that islocated from the western parts of the Colombian Andeanrange to the North-western Ecuadorian areas (Haffer 1969).Assumedly, T. hermani sp. n. is also part of the zoogeographicelements together with T. punctinota that is alreadyrecorded from a wider area in Colombia. On the easternslope, T. magna might be attributed to the Napo regioncomplex, which is represented in Ecuador by other speciesof the Osoriinae, i.e., of the genus Mimogonus Fauvel, 1903and Lispinuncus Irmler, 2005b (Irmler 2010a, b). Three fur-ther geographically restricted groups take part of the Ecua-dorian Tannea fauna. Tannea leticiae can be certainlyattributed a Circum-Amazonian sub-montane group (Irmler2009), because it has been found from the sub-montane rainforests from Peru to Guyana but not in the Central-

Amazonian lowland rain forest. A fourth group is representedby the species T. parallelonota and T. pulcher that have beenrecorded from the North-western parts of South America toCentral America up to northern Costa Rica. The final geo-graphic group, i.e., T. brevicollis, T. picata, T. salasi, and T.tenella, covers a still wider region, from southern Brazil tosouthern Mexico but has not been found in Central Amazon.In particular, the last groups indicate that the genus Tanneaprefers the mountainous tropical regions but avoids thelowland tropical rain forest.

References

Bernhauer M (1942) Neue Staphyliniden aus Kostarika. ZoologischerAnzeiger 138:1–27

Blackwelder RE (1942) Notes on the classification of the staphylinidbeetles of groups Lispinini and Osoriinae. Proceedings of the USNational Museum 92:75–90

Blackwelder RE (1952) The generic names of the staphylinid beetles ofthe groups Lispinini and Osoriinae. Proceedings of the US NationalMuseum 92:75–90

Erichson WF (1840) Genera et species Staphylinorum InsectorumColeopterorum Familiae. Morin, Berlin, p 936

Fauvel C (1865) Etudes sur les staphylinides de l’amerique centrale,principalemente du Mexique. Bulletin de la Société Linnéenne deNormandie 9:8–66

Fauvel C (1903) Faune analytiques des coleopteres de Nouvelle-Caledonie. Revue d’Entomologie 22:203–378

Haffer J (1969) Speciation in Amazon forest birds. Science 165:131–137Herman L (2001) Catalogue of the Staphylinidae (Insecta: Coleoptera).

1758 to the end of the millenium. II. Oxytelinae group. Bulletin ofthe American Museum of Natural History 265:1067–1806

Irmler U (2003) Taxonomy and distribution of the Neotropical speciesof the genera Tannea Blackwelder, 1952 and Nacaeus Blackwelder,1942 with remarks on the genus Lispinus (Coleoptera: Staphylini-dae). Bulletin de l’institut royal des sciences naturelle de Belgique.Entomologie 73:85–134

Irmler U (2005a) New species of the genus Tannea Blackwelder, 1952from central and South America (Coleoptera: Staphylinidae: Osor-iinae). Koleopterologische Rundschau 75:151–171

Irmler U (2005b) A new genus and species of the subfamily Osoriinaefrom the neotropical region (Coleoptera: Staphylinidae: Osoriinae).Koleopterologische Rundschau 75:173–178

Irmler U (2007) The Tannea (Coleoptera: Staphylinidae: Osoriinae)species of Costa Rica—new species and records, a key, ecologicaland geographical remarks. Brenesia 68:69–85

Irmler U (2009) New species and records of the genus Lispinus with akey to the species from Peru (Coleoptera: Staphylinidae: Osorii-nae). Zootaxa 2263:42–58

Irmler U (2010a) New species of the genera Mimogonus and Mim-ogonia (Coleoptera: Staphylinidae: Osoriinae) from the neotropicalregion. Acta Entomologica Musei Nationales Pragae 50:483–494

Irmler U (2010b) A new genus of Osoriinae in the Neotropical regionwith a cladistic analysis of the tribe Thoracophorini (Insecta: Cole-optera: Staphylinidae). Arthropod Systematics and Phylogeny68:229–237

Janzen DH (1983) Costa Rican natural history. University of ChicagoPress, Chicago, London, p 816

The Tannea Blackwelder Species of Ecuador

Author's personal copy