Acanthocollum Opitz, 2010

Opitz, Weston, 2010, New taxa of Epiphloeinae Kuwert (Cleridae) and Chaetosomatidae Crowson (Coleoptera: Cleroidea), Insecta Mundi 2010 (123), pp. 1-28 : 2-3

Acanthocollum Opitz , new genus

Type Species. Enoplium melanurum Klug, 1842: 376 . By present designation.

Diagnosis. The extensive setal tuft along the sides of the pronotum will distinguish the members of this genus from others in subfamily Epiphloeinae .

Description. Size: Length 11.3 mm; width 3.3 mm. Form: Oblong triangular. Integument: Cranium bicolorous; pronotum bicolorous; elytral disc with combinations of yellow and dark regions. Vestiture: Integument highly setose; cranium and pronotum often densely vested with decumbent setae; elytra very densely vested with short 2 o setae and less profusely distributed 1 o. Head: Cranium subrugose, frons vertically indented; antennal carina very prominent; eyes very prominently bulged, finely faceted and deeply broadly incised along frontal margin; antenna inserted at lower angle of eye incision, comprised of 10 antennomeres, capitate, scape with dorsal carina, funicular antennomeres compressed together so that their combined length is about as long as length of antennomere 8; labrum deeply incised, medial tormal processes horizontal and contiguous; mandible subfalciform, dens well developed, mandibular penicillus well developed; maxilla, palpomere 4 conate, laterolacinia present; labium, palpomere 3 conate; gula triagonal. Thorax: Pronotum transverse PL/PW 0.9, lateral tubercle subacute, disc densely sculptured with small coarse punctations; anterior transverse depression absent, posterior transverse depression prominent, pronotal collar very narrow, discal and lateral trichobothria prominent, bothria domed, pronotal projections only slightly extended towards the middle, lateral carina confluent with pronotal hem; elytral epipleural margin gradually broadened to distal four-fifths, then gradually rounded to apex, about 5 times longer than pronotum, about 3 times longer than broad, disc with three vertical carinae, epipleuron not explanate, outer sides strongly deflexed behind humerus, elytral disc adjacent to epipleuron strongly indented, punctations small, much narrower than width of interstitial spaces, subseriate at basal half; mesoscutellum subglobose; protibial anterior margin with 16 spines; tibial spur formula 0-1-1; tarsal pulvillus formula 3-3-1; tarsal claw with basal denticle; metendosternite without furcal lamina. Abdomen: Six visible sterna.

Distribution. This monotypic genus is known only from central and southeastern Brazil.

Etymology. The genus name Acanthocollum is a neuter name that originates from the Greek akanta (= thorn) and the Latin collum (= neck). I refer to the extensive vertical setal tuft on the side margins of the pronotum.