Horniella pilosa Yin and Li

Yin, Zi-Wei & Li, Li-Zhen, 2014, Revision of the Oriental genus Horniella Raffray (Coleoptera, Staphylinidae, Pselaphinae), Zootaxa 3850 (1), pp. 1-83 : 69-72

publication ID

https://doi.org/ 10.11646/zootaxa.3850.1.1

publication LSID

lsid:zoobank.org:pub:BFD1F483-4255-429B-9E17-8D4A9E559C5F

DOI

https://doi.org/10.5281/zenodo.6142785

persistent identifier

https://treatment.plazi.org/id/CD490758-D854-FFAC-FF01-43CD461BFD07

treatment provided by

Plazi

scientific name

Horniella pilosa Yin and Li
status

sp. nov.

25. Horniella pilosa Yin and Li , new species

Figs 43 View FIGURE 43 A, 44, 49G; Map 6 View MAP 6

Type material (1 ♂♂, 2 ♀♀). Holotype, ♂, labeled ‘ Borneo, Sabah, Mt. Kinab. N. P. , Por. H. S. area Eastern Ridge, Tr. 790 m, 17.viii.1988, A. Smetana [B119] / Holotype [red], ♂, Horniella pilosa sp. n., det. Yin & Li, 2014, MHNG’ . Paratypes: 1 ♀, same data, except ‘Tr. 850 m, 28.viii.1988, [ B158 ]’ ( MHNG) ; 1 ♀, labeled ‘ SABAH: Poring Hot Spring , 500 m, 06.v.1987, Burckhardt- Löbl’ ( MHNG) . Each paratype bears a yellow type label similar to that of the holotype except ‘ Paratype ♂ (or ♀)’.

Description. Male ( Fig. 43 View FIGURE 43 A). Length 3.70 mm. Head distinctly longer than wide, HL 0.79 mm, HW 0.59 mm; anterolateral genal projections ( Fig. 44 View FIGURE 44 C) weakly indicated; median sulcus between antennal tubercles short; scapes ( Fig. 44 View FIGURE 44 B) lacking expansion at lateral margins; clubs ( Fig. 44 View FIGURE 44 A) formed by apical three antennomeres, each distinctly elongate; venter lacking lateral spines ( Fig. 44 View FIGURE 44 D). Maxillary palpomeres II greatly elongate, slightly broadened at apical 1/3. Each eye composed of about 42 facets. Pronotum longer than wide, PL 0.81 mm, PW 0.71 mm. Elytra wider than long, EL 0.87 mm, EW 1.28 mm; discal striae reaching near anterior margin of elytra. Protrochanters simple, profemora ( Fig. 44 View FIGURE 44 E) each with one indistinct ventral denticles at base, barely visible, protibiae ( Fig. 44 View FIGURE 44 F), mesotrochanters, mesofemora ( Fig. 44 View FIGURE 44 G), and mesotibiae ( Fig. 44 View FIGURE 44 H) simple, ventral margin of mesofemora and mesal margin of metatibiae ( Fig. 44 View FIGURE 44 I) with dense long hairs; tarsomeres II extending to midlength of tarsomeres III. Abdomen large, AL 1.23 mm, AW 1.26 mm, tergite IV (first visible tergite) with median carina extending through tergal length, lacking lateral discal carinae, tergite V with median carina extending to apical 4/5 of tergal length. Sternite IX ( Fig. 44 View FIGURE 44 J) nearly oval, with well-sclerotized apical portion and less sclerotized basal portion. AeL 0.71 mm; aedeagus ( Figs 44 View FIGURE 44 K–M) with nearly symmetric median lobe in dorso-lateral view, obliquely truncate apex narrowed; endophallus composed two elongate sclerites and apical membranous structure with rows of small denticles.

Female. Similar to male in general appearance; each eye composed of about 35 facets; Legs simple, mesofemora and metatibiae lacking long hairs. BL 3.57–3.58 mm, HL 0.76–0.77 mm, HW 0.59–0.60 mm, PL 0.76–0.81 mm, PW 0.68–0.70 mm, EL 0.85–0.88 mm, EW 1.23– 1.25 mm, AL 1.12–1.20 mm, AW 1.23–1.26 mm. Genital complex ( Fig. 49 View FIGURE 49 G) well-sclerotized, composed of elongate apical part and transversely oval basal part.

Differential diagnosis. This species is placed as a member of the H. gigas group. Males can be readily separated from those of H. gigas and H. smetanai by the presence of long hairs on the ventral margins of the mesofemora and mesal margins of the metatibiae, while the legs of the two other species are normally setose.

Distribution. East Malaysia: Sabah ( Map 6 View MAP 6 ).

Collection notes. Adults were probably collected from leaf litter samples by sifting and using of Winkler-Moczarski extractors.

Etymology. The specific name ‘ pilosa ’ means ‘covered with hair, shaggy’, referring to the long hairs present on the mesofemora and metatibiae.

MHNG

Museum d'Histoire Naturelle

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