Micrillus intermedius (CAMERON 1936) Assing, 2013

Assing, V., 2013, On the Palaearctic and Oriental species of Scymbalium and Micrillus (Coleoptera: Staphylinidae: Paederinae), Linzer biologische Beiträge 45 (2), pp. 1479-1520 : 1499-1502

publication ID

https://doi.org/ 10.5281/zenodo.5301289

DOI

https://doi.org/10.5281/zenodo.6512332

persistent identifier

https://treatment.plazi.org/id/1974879E-FFE1-FFCE-FF04-E920FD5FFCAC

treatment provided by

Marcus

scientific name

Micrillus intermedius (CAMERON 1936)
status

comb. nov.

Micrillus intermedius (CAMERON 1936) View in CoL , nov.comb.

( Figs 23-28 View Figs 23-28 , Map 3 View Map 3 )

Scimbalium intermedium CAMERON 1936a: 43 .

Type material examined Lectotype, present designation: "Malaya Kuala Lumpur / M.Cameron. Bequest. B.M. 1955-147. Syntype / Lectotypus Scymbalium intermedium Cameron, desig. V. Assing 2013 / Micrillus intermedius (Cameron) , det. V. Assing 2013" (BMNH) . Paralectotypes: 4: same data as lectotype ( BMNH) ; 1: " Scimbalium intermedium Cam . Type / Ex F.M.S. Museum. B.M.1955-354 / Syntype" ( BMNH); 1: " Malaya, Kuala Lumpur / Scimbalium intermedium Cam / co-type / Coll. W. Champman in Coll. P. Griveau" ( MHNG) .

Additional material examined: Laos: 14exs., Udomxaiprovince, Pak Beng , 19°54'N, 101°08'E, 450 m, 18.-27.V.2001, leg. Kolibáþ ( NHMB, cAss) GoogleMaps ; 35 exs., Vientiane province, Vang-Vieng, 18°55'N, 102°27'E, 300 m, 10.-15.V. & 1.-6.VI.2001, leg. Kolibáþ ( NHMB, cAss). GoogleMaps Thailand: 1 ex., Chiang Mai province, Thaton , 20°04'N, 99°22'E, 450 m, riverside, at light, 22.VII.2006, leg. Mendel & Barclay (cAss) GoogleMaps ; 4, 2, Bangkok ( BMNH, cAss) ; 1, " Siam " ( BMNH). Locality not identified: 5 exs., "F. [T? J?] Mo. S." ( BMNH) .

Comment: The original description is based on an unspecified number of syntypes from " Selangor: Kuala Lumpur " ( CAMERON 1936a). The male syntype from the Cameron collection at the BMNH is designated as the lectotype.

Redescription: Body length 4.2-5.0 mm; length of forebody 2.3-2.6 mm. Habitus as in Fig. 23 View Figs 23-28 . Coloration: body pale reddish, with the head brown to blackishbrown; legs and antennae dark-yellow.

Head ( Fig. 24 View Figs 23-28 ) approximately 1.05 times as long as broad, convex in cross-section, and with weakly marked posterior angles; dorsal surface with sparse punctation and with shallow, but distinct transverse microsculpture; eyes approximately 0.7 times as long as distance from posterior margin of eye to neck. Antenna approximately 1.8 mm long and slender, preapical antennomeres noticeably oblong.

Pronotum ( Fig. 24 View Figs 23-28 ) approximately 1.2 times as long as broad and 1.05 times as broad as head, distinctly tapering posteriorly, and flattened, i.e., weakly convex in cross-section; dorsal surface with fine micropunctation, without appreciable macropunctation.

Elytra ( Fig. 24 View Figs 23-28 ) 0.95 times as long as pronotum; punctation very dense and fine. Hind wings fully developed.

Abdomen with rather dense and fine punctation; interstices with shallow microsculpture.

: tergite VIII distinctly oblong and with strongly convex posterior margin; sternite VIII ( Fig. 25 View Figs 23-28 ) approximately 1.3 times as long as broad, posterior excision deep and narrow, its depth approximately 0.4 times the length of sternite; aedeagus ( Figs 26-28 View Figs 23-28 ) 0.45-0.50 mm long, distinctly asymmetric in ventral view; ventral process laterally compressed, furnished with numerous short marginal setae; dorsally with strongly apical sclerotized structure (modified dorsal plate?) of distinctive shape; internal sac with large and curved sclerotized structure, this structure apically with finger-shaped processes.

Comparative notes: In size, coloration, and other external characters, M. intermedius is similar to M. nigriceps , but distinguished by the male sexual characters. Its closest relative is M. sutteri (see the following section).

Distribution: Micrillus intermedius is currently known from Malaysia, Thailand (new record), and Laos (new record) ( Map 3 View Map 3 ).

NHMB

Natural History Museum Bucharest

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

Genus

Micrillus

Loc

Micrillus intermedius (CAMERON 1936)

Assing, V. 2013
2013
Loc

Scimbalium intermedium

CAMERON M 1936: 43
1936
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