Trichodromeus armatus ( Cameron, 1941 )

Shavrin, Alexey V., 2024, Review of Hygrogeus Mulsant & Rey, 1880 and Trichodromeus Luze, 1903, with descriptions of three new genera from the eastern Palaearctic Region (Coleoptera: Staphylinidae: Anthophagini: Omaliinae), Zootaxa 5531 (1), pp. 1-62 : 16

Trichodromeus armatus ( Cameron, 1941)

( Figs 2–3 , 39–40 )

Hygrogoeus [sic] armatus Cameron, 1941: 144 .

Trichodromeus armatus : Zerche 1992: 134; Herman 2001: 373, Smetana 2004: 251, Schülke & Smetana 2015: 326.

Type material examined. Holotype ♂: ‘ Holo- | type’ <round label with red margin>, ‘Kashmir | Aphar Wat | 13,000 ft. | Dr.Cameron’ <printed>, ‘H. | armatus | TYPE [red, underlined] Cam.’ <handwritten in black>, ‘M.Cameron | Bequest. | B.M. 1955-147.’ <printed>, ‘UNIQUE TYPE | H.K.Kenward [printed] | det. 197[printed]7’ <handwritten in black>, ‘ Trichodromeus | armatus (Cam.) | Shavrin A.V. det. 2016’ <printed> ( BMNH).

Additional material examined. INDIA: KASHMIR: 1 ♂: ‘ Kashmir Aphar Wat 13,000 ft. Dr.Cameron’, ‘ Hygrogeus’, ‘armatus Cam. ’ ( BMNH) ; 3 ♂♂, 3 ♀♀: ‘ Kashmir Aphar Wat 13,000 ft. Dr.Cameron’, ‘ M.Cameron Bequest. B.M. 1955-147.’ ( BMNH) ; 1 ♂: Baltal. 13.07.1981. G. Ledoux leg. (cSh) ; 1 ♂: NE Srinagar, Kolahoi Glacier. 3500 m. 11.08.2007. C. Reuter leg. (cF) .

Remarks. Hygrogoeus armatus was originally described based on the holotype from “Kashmir: Aphar Wat, altitude 13,000 feet ”. Zerche (1992) transferred it to Trichodromeus and recorded from Pakistan. The shape of the body is variable ( Figs 2–3 ). The studied specimen from Kolahoi Glacier has a narrower body and shorter elytra, but the shape of the aedeagus ( Figs 39–40 ) is identical with that in other studied specimens. From all known species of the genus T. armatus can be easily recognized by the unusual modification in the middle of the inner side of each metatibia with a long and strong tooth.

Figures

FIGURES 1–6. Habitus of Hygrogeus (Fig. 1) and Trichodromeus (Figs 2–6): 1—H. aemulus (Tirol), 2—T. armatus (Kashmir: Baltal), 3—T. armatus (Kashmir: Kolahoi Glacier), 4—T. ketmeniensis (Kyrgyzstan: Chatkal Mts.), 5—T. ovchinnikovi (holotype), 6—T. kumaonensis (paratype). Scale bar: 1.0 mm.

FIGURES 39–46. Aedeagus of Trichodromeus (Figs 39–40: T. armatus (Kashmir: Kolahoi Glacier), Figs 41–42: T. jaegeri (Nepal: Gandaki), Figs 43–46: T. ketmeniensis (Figs 43–44: Kazakhstan, Kulbastau), Fig. 45: Kyrgyzstan, Sary-Chelek, Fig. 46: Kazakhstan, Dolaity): 39, 42, 43, 45–46—parameral view, 40, 42, 44—lateral view. Scale bar: 0.1 mm.