Mizotrechus marielaforetae, 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 : 97-98

Laforêt’s trough beetle Mizotrechus marielaforetae sp. n. Figs 13 30 40

Holotype.

GUYANE, Montagne des Chevaux, Commune de Roura, RN2 PK22, 90 m, 4.7127°N, 52.3966°W, 28 November 2010 (S Brule, PH Dalens, & E Poirier)(NMNH: ADP127183, male).

Derivation of specific epithet.

The epithet “marielaforetae” is an eponym, based on the full stage name of Marie Laforêt, the famous French actress and singer, 5 October 1939 - present, whose voice has a range of diversity like that found in the carabid species richness of Guyane, and who sang a variety of "torch songs", and here I play on the word “torch”, the same word that applies to that being used to ignite the forests of the unique tropical rainforests of South America, an Armageddon in our own times.

Proposed English vernacular name.

Laforêt’s trough beetle.

Diagnosis.

With the attributes of the genus as described above and medium 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 without evident rugae, punctulate. Occiput at sides with evident rugae, punctulate. Pronotum nearly quadrate, quite narrowed behind, with lateral margins straight to hind angle, hind angle dentate, tooth small; base densely punctate. Elytra moderately broad and short, slightly wider than the width of pronotum across anterior third, and with only interneur 1 deeply engraved, 2-5 readily evident yet more shallowly impressed, 6-8 traceable, none punctate; margins behind humeri entire, slightly emarginate. Foreleg femur with slightly produced ridge on postero-ventral margin.

Description.

( Figs 13 , 30 ). Size: See Appendix 1. Moderately small sized for the genus, ABL = 5.9 mm, SBL = 5.12 mm, TW = 2.18 mm. Color: see diagnosis, above. Luster: Head, pronotum, and legs shiny, elytra duller due to shallowly engraved slightly stretched microsculpture. Head: Labrum quadrate and apico-medially emarginate. Eye large, moderately convex. Gena moderately long, straight. Frons, occiput, and gena glabrous. Prothorax: Narrow, quadrate, narrowed moderately toward base, margins straight before hind angle, angle dentate, tooth small, margin moderately explanate except wider at hind angle; surface punctulate, punctures widespread, glabrous. Pterothorax: Elytron moderately convex, intervals flat, proximal interneurs not punctate, distal interneurs somewhat punctate, apex moderately oblique and straight, sutural apex narrowly rounded. Metasternum sparsely setiferous in male. Legs: Normal in male; foreleg femur (as in Fig. 23 ) with slightly produced ridge on postero-ventral margin, not dentate; posterior trochanter narrowly rounded at apex, about half the length of the femur. Abdomen: Abdominal sterna moderately setiferous; sternum IV of male with narrow and dense patch of decumbent setae. Male genitalia: Median lobe ( Fig. 30 ) short and robust with ostium moderately elongate, over half the length of the median lobe; apex with a short narrowly rounded distal end, ventral margin proximal to apex straight, then abruptly curved to apex; endophallus with complexly folded tracheal fields; phallobase hooded, opening more or less 40 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. Adults are 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 4. Digital Photo-illustrations, habitus, dorsal aspect: 13 Mizotrechus marielaforetae sp. n., dorsal aspect, ABL = 5.9 mm, male paratype, ADP 127183, type locality. 14 Mizotrechus minutus sp. n., ABL = 4.4 mm, female paratype, ADP 124920; Guyane, Commune de Sauel, Belvedere de Sauel. 15 Mizotrechus neblinensis sp. n., dorsal aspect, ABL = 6.9 mm, female holotype, ADP 124944; type locality. 16 Mizotrechus novemstriatus Bates 1872, ABL = 7.2 mm, female lectotype, ADP 127163; 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.

Plate 8. Digital Photo-illustration, male genitalia, median lobe and parameres, left lateral, dorsal, and right lateral aspects: 28 Mizotrechus costaricensis sp. n., ADP 128620: type locality. 29 Mizotrechus dalensi sp. n., ADP 129203, Guyane, Saut Parare, Arataie River, Nouragues Field Station. 30 Mizotrechus edithpiafae sp. n., ADP 129203; Ger? locality (see text).

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.