Mizotrechus minutus, Erwin, 2011
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publication ID |
https://dx.doi.org/10.3897/zookeys.145.2274 |
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publication LSID |
lsid:zoobank.org:pub:94F032BD-93F2-4652-B7A3-E914EAB8BB92 |
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persistent identifier |
https://treatment.plazi.org/id/90504CC6-C4AD-4077-98F4-D5E501F72EB7 |
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taxon LSID |
lsid:zoobank.org:act:90504CC6-C4AD-4077-98F4-D5E501F72EB7 |
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treatment provided by |
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scientific name |
Mizotrechus minutus |
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sp. n. |
Minute trough beetle Mizotrechus minutus sp. n. Figs 14 View Plate 4 19 View Plate 6 34 View Plate 10 40 View Figure 40
Holotype.
GUYANE, Saül, Commune de Saül, Belvédère de Saül, 283-325 m, 3.6223°N, 53.2159°W, 10 December 2010 (S Brule, PH Dalens, & E Poirier)(NMNH: ADP124966, male).
Derivation of specific epithet.
The epithet “minutus” is a Latin adjective that adequately describes this species with very small adults.
Proposed English vernacular name.
Minute trough beetle.
Diagnosis.
With the attributes of the genus as described above and very 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 with rugae nearly effaced, punctulate. Occiput punctulate. Pronotum quadrate with lateral margins shallowly emarginated; base nearly smooth. Elytra broad and short, slightly wider than the width of pronotum across anterior third, and with 8 well-impressed punctate interneurs; margins behind humeri not serrulate.
Description.
( Figs 14 View Plate 4 , 19 View Plate 6 , 34 View Plate 10 ). Size: See Appendix 1. Very small, ABL = 4.4-4.6 mm, SBL = 3.77-3.88 mm, TW = 1.49-1.58 mm. Color: see diagnosis, above. Luster: Head, pronotum, elytra, and legs shiny; microsculpture effaced. Head: Labrum quadrate and apico-medially emarginate. Eye moderately large, moderately convex. Gena moderately long, straight. Frons, occiput, and genae glabrous. Prothorax: Broad, narrowed slightly toward base, margin slightly explanate to hind angle, angle about right, not dentate; surface punctulate, punctures widespread, glabrous. Pterothorax: Elytron moderately convex, intervals slightly convex, interneurs striato- punctate, apex moderately oblique and straight, sutural apex narrowly rounded. Metasternum sparsely setiferous in male. Legs: Normal in both sexes; foreleg femur unmodified ( Fig. 19 View Plate 6 ); trochanter narrowly rounded. Abdomen: Abdominal sterna moderately setiferous; sternum IV of male with narrow and dense patch of decumbent setae. Male genitalia: Median lobe ( Fig. 34 View Plate 10 ) elongate and narrow with ostium moderately elongate, over half the length of the median lobe; apex with a long narrow distal end, straight in lateral aspect and narrowly rounded, ventral margin proximal to apex straight; endophallus with complexly folded tracheal fields; phallobase hooded, opening more or less 15 degrees off axis of shaft. Parameres large, left a third longer than the right, both broadly rounded, asetose. Female genitalia: Not investigated; however, it is likely similar to that illustrated on Plate 11 View Plate 11 .
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 December, at the end of the dry season.
Other specimens examined.
Paratypes: Guyane, Saut Pararé, Arataie River, Nouragues Field Station, 51 m, 4.0378°N, 52.6725°W, 11 December 2009 (S Brule, PH Dalens, & E Poirier)(NMNH: ADP124902, male), Saül, Commune de Saül, Belvédère de Saül, 283-325 m, 3.6223°N, 53.2159°W, 10 December 2010 (S Brule, PH Dalens, & E Poirier)(NMNH: ADP124920, female).
Geographic distribution.
( Fig. 40 View Figure 40 ). This species is currently known only from two localities in the lowlands of Guyane.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.