Mizotrechus belvedere, 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 : 87-88

Brule’s trough beetle Mizotrechus belvedere sp. n. Figs 3 26 40

Holotype.

GUYANE, Saül, Commune de Saül, Belvédère de Saül, 283-325 m, 3.6223°N, 53.2159°W, 17 February 2010 (S Brule, PH Dalens, & E Poirier)(NMNH: ADP129201, male).

Derivation of specific epithet.

The epithet “belvedere” is a singular Latinized masculine noun in apposition, based on the name of the area in which these beetles are found.

Proposed English vernacular name.

Belvédère trough beetle.

Diagnosis.

With the attributes of the genus as described above and moderately large 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 above and behind eye in an arc and moderately punctulate. Occiput moderately punctulate. Pronotum longer than wide with lateral margins moderately explanate and basally notched; base moderately microrugose. Elytra moderately broad and short, apex prolonged, wider than the width of pronotum across anterior third, and with 5 well-impressed irregularly punctulate interneurs, intervals not convex; margin behind humerus rough, intervals between microsetae blunt. Foreleg femur with slightly produced postero-ventral margin.

Description.

( Figs 3 , 26 ). Size: See Appendix 1. Moderately small for genus, ABL = 7.2 mm, SBL = 6.14 mm, TW = 2.48 mm. Color: see diagnosis, above. Luster: Head, pronotum and legs shiny, elytra matte. Head: Labrum quadrate, apico-medially slightly V-notched. Eye moderately large and convex. Gena with very slight bulge. Frons, occiput and gena glabrous. Prothorax: Moderately narrow, narrowed slightly toward base, margin moderately explanate, wider before hind angle; surface punctulate, punctures moderately dense, glabrous. Pterothorax: Elytron barely convex, intervals nearly flat, interneurs with well-impressed irregularly-spaced punctulate, apex slightly obliquely prolonged and slightly rounded at extreme sutural apex. Metasternum sparsely setiferous in male. Legs: Normal in male; foreleg femur (as in Fig. 23 ) with slightly produced ridge along postero-ventral margin, not dentate, without short dorsal ridge at base of longer ridge; posterior trochanter tapered to rounded point in male, length half that of femur. Abdomen: Abdominal sterna moderately setiferous, densely so medially on II and III; sternum III of male with short dense patch of decumbent setae medially set between two ambulatory setae; sternum VII shallowly and medially notched in male. Male genitalia: Median lobe ( Fig. 26 ) short and robust with ostium moderately elongate, over half the length of the median lobe; apex a short blunt distal end that is less prominent than in Mizotrechus brulei , slightly curved in lateral aspect, ventral margin proximal to apex evenly curved; endophallus with complexly folded tracheal fields; phallobase hooded, opening more or less 20 degrees off axis of shaft. Parameres large, left a third longer than the right, both broadly rounded, asetose. 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 holotype was active in February, the rainy 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 7. Digital Photo-illustrations, male genitalia, median lobe and parameres, left lateral, dorsal, and right lateral aspects: 25 Mizotrechus bellorum sp. n., ADP 124890; type locality. 26 Mizotrechus belvedere sp. n., ADP 129201; type locality. 27 Mizotrechus brulei sp. n., ADP 127159, Guyane, Montagne des Chevaux, Commune de Roura.

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.