Gnypeta manitobae Casey, 1906

Klimaszewski, Jan, Savard, Karine, Pelletier, Georges & Webster, Reginald, 2008, Species review of the genus Gnypeta Thomson from Canada, Alaska and Greenland (Coleoptera, Staphylinidae, Aleocharinae): systematics, bionomics and distribution, ZooKeys 2 (2), pp. 11-84 : 52-53

11. Gnypeta manitobae Casey

( Figs 13 , 31 a, b , 125-129 )

Gnypeta manitobae Casey 1906: 196 . As synonym of G. bockiana Casey : Moore and Legner 1975: 421. Synonymy confirmed here as not valid. LECTOTYPE (female): CANADA: Manitoba, Winnipeg; Hanham; Type USNM 38864; manitobae Csy. [handwritten by Casey]; Casey bequest 1925; lectotype designation label by Lohse 1988 [designation not published] (USNM). Present designation. Examined.

Material examined

The lectotype only.

Diagnosis (based on female)

This species is known from a single female and is similar to G. crebrepunctata . The two species have a very similar shape of the spermatheca and terminal segments and can be distinguished only by the differences in external morphology and the different geographic ranges. Gnypeta manitobae , in comparison with G. crebrepunctata , has a more transverse pronotum ( Fig. 13 ), and the base of the abdomen is as broad as the elytra ( Fig. 13 ).

From other Nearctic Gnypeta species, it can be distinguished by the following combination of characters: body subparallel ( Fig. 13 ), length 2.6 mm; elytra at suture as long as pronotum and at least 1/4 wider than maximum width of pronotum ( Fig. 13 ); abdomen subparallel and at base about as broad as elytra ( Fig. 13 ); antennal articles 4-7 strongly elongate, 8-10 quadrate to slightly transverse ( Fig. 31 b ). Spermatheca C-shaped with capsule tubular ( Figs 127-129 ).

Description

Body length 2.6 mm; uniformly dark brown with two basal antennal articles and tarsi rust brown ( Fig. 13 ); integument moderately glossy; pubescence yellowish grey and moderately long and dense; antennal articles 4-7 strongly elongate, 8-10 quadrate to slightly transverse ( Fig. 31 b ); head and pronotum of about the same width ( Fig. 13 ); elytra and abdomen wider than either head or pronotum; head rounded posteriorly; pronotum broadest in apical third, pubescence directed anterad along midline and laterad elsewhere; elytra at suture about as long as pronotum and about 1/4 wider than maximum width of pronotum, pubescence directed obliquely postero-laterad, in wavy pattern medially on each side of disc ( Fig. 13 ); abdomen subparallel, at base about as broad as elytra ( Fig. 13 ); metatarsus with basal article slightly longer than second, and the third one slightly shorter than second. Male. Unknown. Female. Tergite 8 truncate apically ( Fig. 125 ). Sternite 8 broadly rounded apically with shallow median emargination ( Fig. 126 ). Spermatheca C-shaped, capsule tubular and short ( Figs 127-129 ); stem short and broadly tubular ( Fig. 127 ). Spermatheca is similar to that of G. crebrepunctata .

Distribution

Gnypeta manitobae is known only from a single type specimen captured in Winnipeg, Manitoba ( Casey 1906).

Collection and habitat data

No data available.

Comments

Casey (1906) in the original description of G. manitobae mentioned a male specimen from Winnipeg, Manitoba, but did not clearly specify how many specimens he had studied. There is only one specimen in the Casey collection from that locality under G. manitobae and it is a female, which was probably misidentified by Casey as a male. Casey did not designate the holotype in his original description and therefore we designated the only syntype female from Winnipeg as the lectotype.

Figures

Figs 9-14. Gnypeta species: 9, G. brevicornis; 10, G. caerulea; 11, G. lohsei; 12, G. crebrepunctata; 13, G. manitobae [apical part of abdomen removed]; 14, G. uteana. Scale = 1 mm

Figs 21-38. Antennae of Gnypeta species: G. ashei: 21a. male, 21b. female; G. brincki: 22a. male, 22b. female; G. atrolucens: 23a. male, 23b. female; G. sellmani: 24a. male, 24b. female; G. dentata: 25a. male, 25b. female; G. groenlandica: 26a. male, 26b. female: G. brevicornis: 27a. male, 27b. female; G. caerulea: 28a. male, 28b. female; G. lohsei: 29a. male, 29b. female; G. crebrepunctata: 30a. male, 30b. female; G. manitobae: 31b. female; G. uteana: 32a. male, 32b. female; G. carbonaria: 33a. male, 33b. female; G. helenae: 34a. male, 34b. female; G. canadensis: 35a. male, 35b. female; G. nigrella: 36a. male, 36b. female; G. saccharina: 37a. male, 37b. female; G. minuta: 38a. male, 38b. female. Scale = 1 mm

Figs 125-129. Genital structures of Gnypeta manitobae (lectotype): 125, female tergite 8; 126, female sternite 8; 127-129, spermatheca.