Paratorchus tilli, Irmler, 2015

Irmler, Ulrich, 2015, New Neotropical genera and species of the tribe Osoriini (Coleoptera: Staphylinidae: Osoriinae), Beiträge Zur Entomologie = Contributions to Entomology 65 (1), pp. 173-196: 185-186

publication ID

http://doi.org/ 10.21248/contrib.entomol.65.1.173-196

publication LSID

lsid:zoobank.org:pub:34012399-A256-429D-A5C0-58667E25EEEB

DOI

http://doi.org/10.5281/zenodo.4754145

persistent identifier

http://treatment.plazi.org/id/8C3A3CF8-6F41-4A3B-9DA3-73A888D74CC3

taxon LSID

lsid:zoobank.org:act:8C3A3CF8-6F41-4A3B-9DA3-73A888D74CC3

treatment provided by

Carolina

scientific name

Paratorchus tilli
status

spec. nov.

Paratorchus tilli   spec. nov.

( Figs 14A–C View Fig , 18A View Fig , 19C View Fig )

Type material: Holotype male: Mexico, Veracruz, 1 mi S Huatusco , 1344 m elevation, collected by Berlese, 02.08.1969, leg. S. & J. Peck ( AMNH).  

Paratypes: Two females with same data as holotype ( AMNH, UIC)   .

Etymology: The specific name of this small species derived from the name of my little grand son Till.

Description: Length: 2.8 mm. Colouration: light reddish brown; legs and antennae lighter brown.

Head: 0.35 mm long, 0.49 mm wide; without eyes; fore-head approximately semicircular; anterior edge of clypeus even; punctation moderately dense and deep; on average, interstices between punctures at least as wide as diameter of punctures; on disc two times as wide as 1. Blind, abdomen not pubescent ................................................................................................................. P. tilli   spec. nov.

- At least with few omatidia .................................................................................................................................................. 2

2. Abdomen pubescent ........................................................................................................................................................... 3

- Abdomen not pubescent .................................................................................................................................................... 6

3. Sides of pronotum evenly narrowed from middle to posterior angles, posterior angles obtuse ................................. ................................................................................................................. P. brasiliensis ( BERNHAUER & SCHUBERT, 1910)  

- Sides of pronotum nearly parallel in posterior half ........................................................................................................ 4 diameter; laterally with few setae; setae extremely short; without microsculpture; between normal punctures with sparse micro-punctation; temples with deep netlike microsculpture.

4. Large species of at least 3.0 mm length, sides of pronotum parallel, not sinuate in front of posterior angles ....... 5

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Small species of 2.5 least, sides of pronotum at least slightly sinuate in front of posterior angles .............................. ................................................................................................................................................... P. panamae ( IRMLER, 2005)   5. Sides of pronotum evenly rounded, pronotal punctation deeper and denser, interstices between punctures as wide as diameter of punctures ..................................................................................................... P. bolivianus ( IRMLER, 2005)  

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Sides of pronotum slightly sinuate in middle, pronotal punctation finer and sparser, interstices between punctures much wider than diameter of punctures ....................................................................... P. columbiensis ( IRMLER, 1987)   6. Large species of at least 4.0 mm length ............................................................................... P. breviatus ( IRMLER, 2007)  

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Smaller species of 2.5 to 2.8 mm length ........................................................................................................................... 7 7. Pronotum deeply and densely punctate, surface polished without microsculpture, shiny .......................................... ........................................................................................................................................... P. chiriquensis ( IRMLER, 2005)  

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Pronotum finely and sparsely punctate, surface with netlike microsculpture, matt ............ P. chilensis ( IRMLER, 2005)  

Antennae as long as head and half of pronotum combined; first antennomere thick; thicker than second oval and conical third antennomere; second and third antennomere equal in length and longer than following antennomeres; antennomeres four to eleven increasing in width; fourth longer than wide; tenth nearly twice as wide as long; surface polished and shiny.

Pronotum: 0.51 mm long, 0.64 mm wide; widest in anterior third; slightly narrowed to anterior angles in convex curve; in posterior two third evenly narrowed to posterior angles; nearly parallel; posterior angles rectangular; lateral margin distinct; in dorsal aspect visible throughout its total length; at posterior angles with indistinct impression; punctation deeper and denser than on head; on average, interstices between punctures as wide as diameter of punctures; between coarse punctures with sparse micro-punctation; with irregular microsculpture; surface less shiny than on head.

Elytra: 0.37 mm long, 0.67 mm wide; sides slightly widened to posterior angles; shoulders rectangular; posterior edge slightly emarginate; punctation still deeper and coarser than on pronotum; partly coriaceous; with coriaceous ground-sculpture; surface less shiny than on pronotum.

Abdomen densely and deeply punctate; similar as on pronotum; dorsally punctures without setae; laterally and ventrally with short yellow setae; surface without microsculpture; polished and shiny.

Aedeagus elongate; apical lobe smoothly rounded ending in acute apex; paramera long and sinuate; longer than apical lobe; endophallus with long and straight basal part and short spiral part at apex.

Diagnosis: The species can be easily identified by the absence of eyes. All other species in the genus have at least few omatidia. The overall habitus resembles that of P. panamae   , but P. panamae   has at least 5 omatidia and the pronotum is more densely punctate.

AMNH

American Museum of Natural History