Gnypeta dentata Klimaszewski, 2008

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 : 37-39

5. Gnypeta dentata Klimaszewski , sp. nov.

urn:lsid:zoobank.org:act:F1457DAA-A6BF-4814-A8BF-BEE50404EB1F

( Figs 7 , 25 a, b , 75-82 , 194 )

HOLOTYPE (male): CANADA, Northwest Territories, Unnamed Lake, 18 mi NW Inuvik, via East Channel , [= 68°21' N, 133°43' W] 26.VI.1972, A. Smetana, CNC No. 23677 ( CNC) . PARATYPES: listed in Appendix A.

Etymology

This species is named for distinct dents on male tergite 8.

Diagnosis

This species can be recognized by the following combination of characters: body length 2.5-2.7 mm ( Fig. 7 ); elytra (at suture) about as long as pronotum and 1/4 wider than maximum width of pronotum ( Fig. 7 ); abdomen at base slightly narrower than elytra ( Fig. 7 ); antennal articles 4-6 subquadrate to moderately elongate, articles 7-9 slightly transverse ( Figs 25 a, b ); median lobe of aedeagus with apex narrowly produced with sinuate margins in lateral view ( Fig. 75 ); spermatheca with capsule funnel-shaped and cylindrical ( Fig. 80 ); stem curved and slightly swollen basally ( Fig. 80 ); male tergite 8 with four apical dents ( Fig. 78 ).

Description

Body length 2.5-2.7 mm; dark brown to black, sometimes central part of elytra and legs or tarsi only reddish brown ( Fig. 7 ); integument moderately strongly glossy; pubescence yellowish grey and moderately long and dense; antennal article 4 slightly shorter than preceding article, articles 4-6 quadrate to moderately elongate, and 7-9 slightly transverse ( Figs 25 a, b ); head and pronotum of about the same width ( Fig. 7 ); elytra and abdomen wider than either head or pronotum; elytra small and short ( Fig. 7 ); head rounded basally; pronotum broadest in apical third, pubescence directed anterad along midline and laterad elsewhere; elytra (at suture) about as long as pronotum and 1/4 broader than maximum width of pronotum ( Fig. 7 ), pubescence directed obliquely postero-laterad, wavy pattern occurs on each side of disc; abdomen subparallel, slightly narrower than elytra at base ( Fig. 7 ); metatarsus with two basal articles of about the same length and the third one slightly shorter. Male. Tergite 8 transverse and truncate apically, with four apical dents ( Fig. 78 ). Sternite 8 transverse and slightly produced posteriorly ( Fig. 79 ). Median lobe of aedeagus with narrowly produced apical part of tubus in lateral view ( Fig. 75 ); bulbus enlarged without pronounced two anterior projections in dorsal view ( Fig. 76 ); internal sac with structures as illustrated ( Figs 75, 76 ). Female. Tergite 8 truncate apically ( Fig. 81 ). Sternite 8 broadly rounded posteriorly and bearing median emargination ( Fig. 82 ). Spermatheca with capsule funnel-shaped and cylindrical ( Fig. 80 ); stem curved and swollen basally ( Fig. 80 ).

Distribution (Fig. 194)

Gnypeta dentata is a Nearctic species recorded here from Saskatchewan, Alberta, and Northwest Territories.

Collection and habitat data

Adults were collected in June, July and August; no habitat data available.

Comments

The late Gustav Adolf Lohse (Hamburg, Germany) worked on a revision of Nearctic Gnypeta , but was not able to complete his project. Some CNC specimens of this species bear his identification labels as G. dentata Lohse [manuscript – unpublished name].

Figures

Figs 3-8. Gnypeta species: 3, G. ashei; 4, G. brincki; 5, G. atrolucens; 6, G. sellmani: 7, G. dentata; and 8, G. groenlandica. 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 75-82. Genital structures of Gnypeta dentata: 75, median lobe of the aedeagus in lateral view, 76, dorsal view; 77, paramere; 78, male tergite 8; 79, male sternite 8; 80, spermatheca; 81, female tergite 8; 82, female sternite 8.

Fig. 194. Collection localities in Canada of G. crebrepunctata, G. dentata, and G. helenae.