Queinnectrechus Deuve, 1992

Deuve, Thierry, Kavanaugh, David H. & Liang, Hongbin, 2016, Inventory of the Carabid Beetle Fauna of the Gaoligong Mountains, Western Yunnan Province, China: Species of the Tribe Trechini (Coleoptera: Caraboidea), with Descriptions of Four New Genera, One New Subgenus and 19 New Species., Proceedings of the California Academy of Sciences 63 (12), pp. 341-455 : 365

Genus Queinnectrechus Deuve, 1992

Queinnectrechus Deuve, 1992b:354 .

TYPE SPECIES.— Queinnectrechus excentricus Deuve, 1992a

DIAGNOSIS.— Adults of this genus ( Figs. 12–14 ) can be recognized by the following combination of character states: size moderate (BL = 3.5 to 4.8 mm), apterous, body dark, reddish brown to piceous, surface micaceous; head with small eyes, mentum and submentum fused; right mandible tridentate, the premolar tooth distinct but joined with the retinaculum (see Deuve 1992b, Fig. 23 ); pronotum cordiform and markedly convex, lateral margination effaced posteriorly, with two setae (midlateral and basolateral) present on each side; elytra markedly convex, inflated, slightly tear-shaped, humeri effaced, elytral discal striae absent or vestigial, with two (in most members) or three (in a few members) discal setae present, aligned on interval 3 near stria 3, preapical seta absent from most members, in some of these members inserted forward in a subdiscal position, in very few placed in typical trechine position nearer elytral apex and next to stria 2; protibiae furrowed; abdominal ventrites IV to VI glabrous except for a single pair of paramedial setae; endophallus of male aedeagus with two sclerites.

COMMENTS.— Two new genera closely related to Queinnectrechus have recently been described. Members of Dactylotrechus Belousov and Kabak (2003) are distinguished by the supernumerary setae present on the external margins of the pronotum and on more lateral areas of the elytral disc. Members of Puertrechus Belousov and Kabak (2014a) are distinguished by the presence of a single discal setae subbasally on interval 5. Members of both taxa have a preapical seta inserted near stria 2, a plesiomorphic feature among trechines. Taxonomic limits and phylogenetic relationships among the “genera” Stevensius , Kozlovites Jeannel (1935) , Queinnectrechus , Dactylotrechus , Puertrechus , Sinotrechiama Uéno (2000) , Uenoite s Belousov and Kabak (2016) and Minutotrechus (describe above) are still poorly resolved. This is why we describe below a new taxon, Gaoligongtrechus , provisionally with the rank of subgenus. This assignment can be changed as needed in the future.

GEOGRAPHICAL DISTRIBUTION.— This genus, which currently include 13 described species (Belousov and Kabak 2003, Casalle and Magrini 2009, Deuve 1992a, and Uéno 1998a and 1998b) is currently known from the Min Shan region of northern Sichuan Province southwest to western Yunnan Province. The Gaoligong Shan forms the southwestern limit of the known distributional range of the genus.

Figures

FIGURE 12. Queinnectrechus (s. str.) griswoldi sp. nov.; a. Dorsal habitus (CASENT1026334). b. Median lobe of aedeagus of male (CASENT1026334), left lateral aspect. c. Map of locality records (red circles) for Q. griswoldi in the Gaoligong Shan region. Scale lines a, b = 0.5 mm, c = 100 km.

FIGURE 13. Queinnectrechus (s. str.) gongshanicus sp. nov.; a. Dorsal habitus (CASENT1024868). b. Median lobe of aedeagus of male (CASENT1024868), left lateral aspect. c. Map of locality records (red circles) for Q. gongshanicus in the Gaoligong Shan region. Scale lines a, b = 0.5 mm, c = 100 km.

FIGURE 14. Queinnectrechus (Gaoligongtrechus) balli sp. nov.; a. Dorsal habitus (CASENT1001935). b. Median lobe of aedeagus of male (CASENT1001935), left lateral aspect. c. Map of locality records (red circles) for Q. balli in the Gaoligong Shan region. Scale lines a, b = 0.5 mm, c = 100 km.

FIGURE 23. Trechus gongshanensis sp. nov.; a. Dorsal habitus (CASENT1001929). b. Median lobe of aedeagus of male (CASENT1001929, left lateral aspect. c. Map of locality record s(red circles) for T. gongshanensis in the Gaoligong Shan region. Scale lines a, b = 0.5 mm, c = 100 km.