Passalus (Passalus) bucki Luederwaldt, 1931

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) bucki Luederwaldt, 1931

( Fig. 2 )

Type locality. Brazil.

Diagnosis. 34 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, on their exterior side at base are the interior tubercles that are same size as medio-frontal tubercles. Central tubercle of MFS with apex not free, basolateral tubercles marked. Antennal club tetralamellate, with the forth lamella reduced. Apex of lacinia bidentate. Mentum with medial base swollen and glabrous. Prosternal process rhomboidal, truncate. Mesosternum glabrous with scars marked and elongate. Antero-lateral metasternum and lateral groove pubescent, disc delimited by punctures posterior to middle. Humeri pubescent, epipleura pubescent in basal third.

Material examined. One specimen. TRINIDAD AND TOBAGO: Trinidad, St. Andrew County, 2.5 mi. E of Valencia, ex large (very hard) logs on ground, coll. P. Hunter, W.T. Atyeo, 27.III.1987, Passalus (Passalus) bucki Lued. Reyes-Castillo det. 87 (1♂ IEXA).

Distribution. Argentina, Brazil, Colombia, French Guiana, and Trinidada and Tobago ( Luederwaldt 1931, Hincks & Dibb 1935, Reyes-Castillo 1973, Amat-García et al. 2004, Jiménez-Ferbans et al. 2013).

Comments. This species is sometimes confused with P. interstitialis , from which it differs by its smaller size and the elytral pubescence that only covers the basal third of the epipleura and the tenth interstriae. Also, the basolateral prothorax has less dense pubescence than P. interstitialis .

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.