Mizotrechus batesi, Erwin, 2011

Erwin, Terry L., 2011, Rainforest understory beetles of the Neotropics, Mizotrechus Bates 1872, a generic synopsis with descriptions of new species from Central America and northern South America (Coleoptera, Carabidae, Perigonini), ZooKeys 145, pp. 79-128 : 85-86

Bates’ trough beetle Mizotrechus batesi sp. n. Figs 1 40

Holotype.

Guyane, Saut Pararé, Arataie River, Nouragues Field Station, 51 m, 4.0378°N, 52.6725°W, 30 November 2009 (S Brule, PH Dalens, & E Poirier)(NMNH: ADP124884, male).

Derivation of specific epithet.

The epithet “batesi” is an eponym, based on the family name of Henry Walter Bates, whose eleven years of collecting beetles in South America capturing adults of many new species, and genera such as this, would qualify him for the Hall of Fame of beetle collectors and describers, if there was such a Hall.

Proposed English vernacular name.

Bates’ trough beetle.

Diagnosis.

With the attributes of the genus as described above and small sized for the genus as it is presently understood; adults have castaneous integument, except anterior parts of mandible, baso-lateral corner of labrum, and clypeal suture piceous. Frons shallowly rugose and punctulate. Occiput punctulate. Pronotum quadrate with lateral margin shallowly emarginate just anterior to hind angle; base densely punctulate. Elytra narrow and elongate, about the width of pronotum across anterior third, and with 8 well-impressed interneurs, intervals flat; margin behind humerus shallowly serrulate. Foreleg femur with slightly produced ridge on postero-ventral margin.

Description.

( Fig. 1 ). Size: See Appendix 1. Small for genus, ABL = 5.9 mm, SBL = 4.9 mm, TW = 1.8 mm. Color: see diagnosis, above. Luster: Head, pronotum and legs shiny. Head: Labrum quadrate and medially notched apically. Eye small, moderately convex. Gena long, straight. Frons, occiput and gena glabrous. Prothorax: Broad, narrowed slightly toward base, margin beaded, not explanate except at hind angle; surface punctulate, punctures widespread, glabrous. Pterothorax: Elytron moderately convex, intervals slightly costate, interneurs striate, not punctate, apex slightly oblique and slightly rounded, sutural apex narrowly truncate. Metasternum sparsely setiferous in male. Legs: Normal in male; foreleg femur (as in Fig. 21 ) with slightly produced long ridge on postero-ventral margin and with a very short secondary ridge basally and above end of long ridge, not dentate; posterior trochanter tapered to point, length nearly half that of femur. Abdomen: Abdominal sterna moderately setiferous; sternum IV of male with narrow and dense patch of decumbent setae; sternum VII medially notched in male. Male genitalia: Aedeagus and parameres missing from si ngle known male holotype, although the ring sclerite is present. Female genitalia: Unknown.

Dispersal potential.

These beetles are macropterous and capable of flight. They are moderately swift and agile runners.

Way of life.

The adult holotype was collected in a flight intercept trap in the rainforest understory. The adult holotype was active in November, at the end of the dry season.

Other specimens examined.

None.

Geographic distribution.

( Fig. 40 ). This species is currently known only from the type locality in the lowlands of Guyane.

Figures

Plate 1. Digital Photo-illustrations, habitus, dorsal aspect: 1 Mizotrechus batesi sp. n., ABL = 5.9 mm, male holotype, ADP 124884; type locality. 2 Mizotrechus bellorum sp. n., ABL = 6.9 mm, male holotype, ADP 124890; type locality. 3 Mizotrechus belvedere sp. n., ABL = 7.2 mm, male holotype, ADP 129201; type locality. 4 Mizotrechus brulei sp. n., ABL = 6.7 mm, female paratype, ADP 124926; type locality.

Plate 6. Digital Photo-illustrations, anterior femur, ventral aspect: 19 Mizotrechus minutus sp. n., ADP 124966; type locality. 20 Mizotrechus dalensi sp. n., ADP 124896; type locality. 21 Mizotrechus chontalesensis sp. n., ADP 127181; type locality. 22 Mizotrechus edithpiafae sp. n., ADP 124948; type locality. 23 Mizotrechus brulei sp. n., ADP 129205; type locality. 24 Mizotrechus gorgona. sp. n., ADP 128622; type locality.

Figure 40. Distribution symbol map for known localities of Mizotrechus batesi, Mizotrechus bellorum, Mizotrechus belvedere, Mizotrechus brulei, Mizotrechus dalensi, Mizotrechus grossus, Mizotrechus marielaforetae, Mizotrechus minutus, Mizotrechus poirieri, Mizotrechus neblinensis, spp. n.