Iviephengus ferreirai, Roza, 2023

Roza, André Silva, 2023, A new genus and a new species of railroad-worm beetle from Peru (Coleoptera, Phengodidae, Mastinocerinae), European Journal of Taxonomy 864 (1), pp. 64-76 : 69-71

Iviephengus ferreirai gen. et sp. nov.

urn:lsid:zoobank.org:act:B494D7AF-5567-4E31-B733-450E353A4F1A

Figs 1–5

Diagnosis

Body overall yellowish brown, with meso- and metanotum, anterior half of metasternum, and abdominal tergites and ventrites dark brown (with the exception of the last two) ( Fig. 1A–C ). Eyes occupying about 1/5 of head width in dorsal view; in lateral view, posterior margin vertical, slightly reniform ( Fig. 2D ). Antennomere IV length subequal to III, crescent until X, X–XII decrescent ( Fig. 2G ). Pronotum slightly wider than long, anterior margin straight, posterior margin slightly curved ( Fig. 1D ). Elytron 2.5 × as long as wide ( Fig. 1A ).

Etymology

The species name is given in honour of Vinicius S. Ferreira, a good friend and fellow Coleoptera researcher ( Lycidae specialist). Vinicius received me during my visit to MAIC and guided my search through the available material. Vinicius also has contributed to my research through collaborations, discussions, and other contributions. Singular genitive, masculine.

Type material

Holotype

PERU • ♂; San Martín, 30 km S of Picota; 6–16 Mar. 2005; M.E. Irwin leg.; Malaise trap; PE11-02; MUSM.

Paratypes

PERU • 2 ♂♂; same collection data as for holotype; DZRJ • 13 ♂♂; same collection data as for holotype; MAIC .

Type locality

Picota, San Martín, Peru.

Description

Male

MEASUREMENTS (n = 13). Total length: 3.3–3.8 mm (aver. 3.6 mm). Head length: 0.63–0.68 mm (aver. 0.66 mm). Head width: 0.80–0.90 mm (aver. 0.87 mm). Pronotum length: 0.77–0.84 mm (aver. 0.80 mm). Pronotum maximum width: 0.93–0.96 (aver. 0.95 mm). Elytron length: 1.61–1.64 mm (aver. 1.63 mm). Elytron maximum width: 0.62–0.65 mm (aver. 0.64 mm).

MORPHOLOGY. Head slightly wider than long, integument glossy, smooth, coarsely punctate, eyes small, feebly protruding, occupying 1/5 of the width in dorsal view ( Figs 1D , 2A ) post-ocular area subequal to eye length in lateral view, posterior margin straight, slightly reniform ( Fig. 2D ); antennomere IV length subequal to III, progressively longer from IV to X, X–XII decrescent, XII slightly lanceolate, antennomere IV flabellae 4× as long as antennomere body ( Fig. 2G ); maxilla with last palpomere as long as the three preceding ones ( Fig. 2J ); labium with last palpomere five times longer than the first one ( Fig. 2K ). Pronotum slightly wider than long, integument glossy, smooth, coarsely punctate, anterior margin straight, lateral margins dorsally subparallel, posterior margin slightly curved ( Fig. 1D ). Elytron heavily setigerous punctate, around 2.5 × as long as wide ( Fig. 1A ). Posterior wings with venation as in the genus description ( Fig. 1E ). Tergite IX transverse, 3× as wide as long in the middle line; tergite X 1.5 × as long as wide ( Fig. 4E ). Sternite VIII with posterior margin slightly curved ( Fig. 4C ); sternite IX 2× times as long as wide when including membranous area, posterior margin slightly emarginate ( Fig. 4F ). Aedeagus as in the genus description ( Fig. 4D, G–H ).

COLORATION. Body overall yellowish brown, with meso- and metanotum, anterior half of metasternum, and tergites and ventrites dark brown (with the exception of the last two).

Immatures and females

Unknown.

Biology and distribution

Iviephengus ferreirai gen. et sp. nov. is only known to occur in the Peruvian Amazon ( Fig. 5 ). All specimens were collected in March, the end of the Summer in the southern hemisphere. Specimens were never seen alive, so there is no data regarding their habits.

Figures

Fig. 1. Iviephengus ferreirai gen. et sp. nov. A–D. Holotype, ♂ (MUSM). A. Habitus, dorsal. B. Habitus, lateral. C. Habitus, ventral. D. Head and pronotum, lateral. E. Paratype, ♂ (DZRJ). Posterior wing, dorsal.

Fig. 2. Iviephengus ferreirai gen. et sp. nov., paratype, ♂ (DZRJ). A. Head, dorsal. B. Head, ventral. C. Head, frontal. D. Head, lateral. E. Head, posterior. F. Head, occipital. G. Antenna, lateral. H. Left mandible, dorsal. I. Left mandible, frontal. J. Maxilla, ventral. K. Labium, ventral.

Fig. 3. Iviephengus ferreirai gen. et sp. nov., paratype, ♂ (DZRJ). Scanning electron micrographs. A. Protarsus, lateral. B. Protarsus, protarsomere I, comb, ventral, detail. C. Protarsus, claw, frontal.

Fig. 4. Iviephengus ferreirai gen. et sp. nov., paratype, ♂ (DZRJ). A. Abdomen, dorsal. B. Abdomen, ventral. C. Sternites VII and VIII, ventral. D. Aedeagus, lateral. E. Tergites IX and X, dorsal. F. Sternite IX, ventral. G. Aedeagus, dorsal. H. Aedeagus, ventral.

Fig. 5. Distribution (type locality) of Iviephengus ferreirai gen. et sp. nov.