Tinotus acerbus ( Casey, 1911a ) Gusarov, 2003

Gusarov, Vladimir I., 2003, Revision of some types of North American aleocharines (Coleoptera: Staphylinidae: Aleocharinae), with synonymic notes, Zootaxa 353 (1), pp. 1-134 : 12-15

Tinotus acerbus ( Casey, 1911a) , comb. nov.

( Figs. 1–9 )

Acrimea acerba Casey, 1911a: 15 .

Acrimea resecta Casey, 1911a: 14 , syn. nov.

(Other references are omitted)

Type material. Lectotype of Acrimea acerba (here designated): ♂, “N.[orth] Yakima, Wash.[ington state (Wickham)]”, “ acerba Csy. ”, “TYPE USNM 39737” (red label), “CASEY bequest 1925” ( NMNH).

Lectotype of Acrimea resecta (here designated): ♀, “ Coeur d'Alene, IDAHO [ Wickham ]”, “ Acrimea resecta Csy. ”, “TYPE USNM 39736” (red label), “CASEY bequest 1925” ( NMNH).

Additional material. CANADA: British Columbia: ♂, ♀, 4 mi. W Midway , ex river debris, 6.vi.1968 (Campbell & Smetana) ( CNCI, SPSU) .

Diagnosis. Tinotus acerbus differs from the other Nearctic species of Tinotus in its brown body, the weak and poorly visible microsculpture of its glossy pronotum, the strong asperate punctation of its elytra, its lack of a medial impression on the male head and pronotum, its unmodified male sternum 8, and the shape of its aedeagus ( Figs. 5–8 ), in particular the straight apex of its median lobe (in lateral view ( Fig. 7 )).

Additionally, Ti. acerbus differs from Ti. morion in its brown body color; from Ti. caviceps in its lack of a medial impression on the male head and pronotum; from Ti. imbricatus in its glossier pronotum, its lack of a medial impression on the male pronotum, and its unmodified male sternum 8; from Ti. parvicornis in its glossier pronotum.

Discussion. The lectotypes of Acri. acerba and Acri. resecta are similar in all external characters. These lectotypes are identical in the shape of their genitalia to the male and female specimens listed above in Material and found in the same locality in British Columbia. Tinotus acerbus is a valid species which was not included in the review of Nearctic Tinotus by Klimaszewski & Pelletier (2002).

Distribution. Tinotus acerbus is known from Washington, Idaho and British Columbia.

Figures

FIGURES 1–4. Abdominal segment 8 of Tinotus acerbus (Casey) (lectotype of Acrimea acerba (1–2) and lectotype of Acri. resecta (3–4)). 1 — male tergum 8; 2 — male sternum 8; 3 — female tergum 8; 4 — female sternum 8. Scale bar 0.2 mm.

FIGURES 5–9. Genitalia of Tinotus acerbus (Casey) (lectotype of Acrimea acerba (5–8) and lectotype of Acri. resecta (9)). 5 — median lobe, parameral view; 6 — median lobe with details of retracted internal sac, abparameral view; 7 — median lobe, lateral view; 8 — median lobe with details of retracted internal sac, lateral view; 9 — spermatheca. Scale bar 0.1 mm (9), 0.2 mm (5– 8).