Passalus (Passalus) coarctatus Percheron, 1835

Jiménez-Ferbans, Larry, Reyes-Castillo, Pedro & Schuster, Jack C., 2015, Passalidae (Coleoptera: Scarabaeoidea) of the Greater and Lesser Antilles, Zootaxa 3956 (4), pp. 491-512 : 494

Passalus (Passalus) coarctatus Percheron, 1835

( Fig. 3 )

Type locality, Brazil

Diagnosis. 34.9–38.3 mm total length. Clypeus hidden below frons, not visible dorsally, with anterior angles developed. Frons border with two secondary mediofrontal teeth separated by a distance slightly less than the distance separating the secondary mediofrontal tooth from its respective mediofrontal tooth. Frontal fossae glabrous. Medio-frontal tubercles developed, basolaterally with interior tubercles that are smaller. Central tubercle of MFS with apex very free, basolateral tubercles. Antennal club trilamellate. Apex of lacinia bidentate. Mentum with medial base swollen and pubescent. Prosternal process rhomboidal, acute. Mesosternum pubescent with scars not marked. Antero-lateral mesosternum and lateral groove pubescent, disc delimited by punctures except anteriorly. Humeri pubescent, epipleura pubescent in the basal two-thirds.

Material examined. 12 specimens. TRINIDAD AND TOBAGO: Trinidad: Arima Valley, Log 7''dia., 580 m, 19.XII.1981, J.C. Schuster. Passalus unicornis // Passalus (Passalus) coarctatus Percheron, 1835 Det. : Jiménez- Ferbans, 2012 (5 UVGC); St. Andrew County, 2,5 mi. E of Valencia, ex. Large (very hard) logs on ground, 27.III.1987, coll. P. Hunter, W.T. Atyeo, Passalus (Passalus) unicornis Lep. et Serv. Reyes-Castillo , det. 87// Passalus (Passalus) coarctatus Percheron, 1835 Det. : Jiménez-Ferbans, 2012 (1♀, 1♂ IEXA); George County mountains, 7 mi. N Port of Spain, ex decaying log, 26.III.1987, coll: P. Hunter, W.T. Atyeo. Passalus (Passalus) unicornis Lep. et Serv. Reyes-Castillo , det. 87// Passalus (Passalus) coarctatus Percheron, 1835 Det. : Jiménez- Ferbans, 2012 (2♀♀, 2♂♂ IEXA). St. George Co., Simla Research Station, Arima Valley, N. Range, 800 ft. 10°41'34''N 61°17'22''W, 23.v.2000, Alistair S. Ramsdale (1 UVGC).

Distribution. Brazil, Trinidad and Tobago ( Percheron, 1835).

Comments. The prominent central tubercle of P. coarctatus causes confusion with P. unicornis ; however, P. coarctatus has 8–10 glabrous elytral striae, medial basal region of mentum pubescent, and mesosternal scar pubescent. Another similar species is P. c on i f er us Eschscholtz, from which P. coarctatus differs by having a very free central tubercle.

Figures

FIGURES 1 – 4. Head and pronotum, dorsal view. 1. Passalus abortivus. 2. P. bucki. 3. P. coarctatus. 4. P. interruptus. Scale bars: 1 mm.