Deretaphrus boliviensis Lord and McHugh

Lord, Nathan P. & McHugh, Joseph V., 2013, A Taxonomic Revision of the Genus Deretaphrus Newman, 1842 (Coleoptera: Cucujoidea: Bothrideridae), The Coleopterists Bulletin (mo 12) 67, pp. 1-107 : 21-22

Deretaphrus boliviensis Lord and McHugh , new species

( Figs. 61 , 90–91 , 144 , 165 , 181 , 191–192 )

Diagnosis. This species can be readily distinguished from congeners by the Bolivian distribution, distinct male genitalia, rugosely punctate pronotal disc, sinuate pronotal median longitudinal canal, distinct submentum shape, and eye with a slight cuticular expansion of the head capsule posteriorly. This species is most similar to the North American D. oregonensis but is separated by the shape of the posterior portion of the longitudinal canal, the distinctly smaller elytral punctures, and the form of the aedeagus.

Description. Length 9.8 mm. Width 2.8 mm. Body elongate, parallel, dark red; dorsal surface glabrous, rugose, matte to slightly shiny; ventral surface moderately shiny, glabrous except for minute setae that arise from punctures. Head: In dorsal view, slightly narrowed anteriorly; without laterally expanded supra-ocular ridges; eyes visible from above; punctures small and dense except sparse along posterior margin. Frontoclypeal suture distinct, arcuate anteromedially. Anterior margin of clypeus broadly arcuate. Eyes evenly convex; eye slightly emarginate posteriorly by a swollen strip of cuticle. Submentum shape as in Fig. 50 ; distinctly separated from subgenal braces, without paired setose pits; anterior margin biangulate, distinctly emarginated medially, slightly expanded anteroventrally over oral cavity, a portion of the mentum visible. Antennal groove welldeveloped, impunctate. Antenna sparsely setose; segments 3–8 with a single transverse row of short setae. Antennal club segments 9 and 10 with 2 transverse rows of short setae, 1 row at midline, the second row arising near apex of the segment. Penultimate segment with a single median transverse row of minute setae. Antennal club slightly asymmetrical, leading edge of club segments much more inflated than trailing edge. Dorsal surface (external face) of mandible without median setose groove. Thorax ( Fig. 61 ): Pronotum elongate, widest near anterior ¼; dorsal surface evenly convex; anterior margin weakly sinuate, slightly wider than head; anterior angles rounded; base narrower than elytral bases; posterior margin weakly sinuate; posterior angles with small denticle; base with an obtuse groove that extends from the lateral margins and terminates on either side before the midline; midline raised, raised portion continues laterad of the posterior pronotal longitudinal canal; portion on either side of posterior longitudinal canal is depressed anterior to the obtuse groove; lateral margin with incomplete carina, forming a distinct raised border in dorsal view. Pronotal disc with moderately small, dense punctures. Pronotal median longitudinal canal well-developed, interrupted to form a deep, anterior fovea and a posterior canal; raised interruption of the canal impunctate; anterior fovea oval, not punctured internally; posterior canal deeply impressed, expanded and rounded anteriorly, narrowed medially then expanded and narrowed posteriorly; posterior canal closed at base. Hypomeron sparsely punctate, punctures slightly larger than found on pronotal disc; lateral walls nearly vertical. Prosternum flat medially, strongly deflexed at lateral margin. Tergosternal suture weakly sinuate. Elytra ( Figs. 90–91 ): Elytron convex. Interstitial intervals 3, 5, 7, and 9 carinate, intervals 3, 5, and 7 shiny; intervals 3, 5, and 7 carinate for entire length, intervals 5 and 7 merge and continue toward apex, merging with interval 9 at raised apical margin of the elytra; intervals 3, 5, 7, and 9 with micropunctures at crest. Apical elytral margin with small, dense punctures. Basal elytral margin with intervals 3 and 5 each ending in a knob-like protuberance; protuberance of interstitial interval 5 merges with finger-like callosity on the elytral shoulder. Legs: Base of femur with short, sparse setae; inner face of tibia with fringe of long, dense setae. Tarsus densely setose with long setae that extend beyond the segment from which they arise. Abdomen: Ventrite V with a slightly raised, thickened apical margin. Aedeagus: Phallobase as in Fig. 144 . Tegmen consisting of paired, slender subtriangular plates at middle; plates narrowly touching medially. Basal piece with longer anterolateral struts; struts curved anteriorly. Parameres reduced, extremely short, transverse, distinctly separated and individually articulated to phallobase; paramere densely setose with long, thin setae at apical margin; dorsal surface of paramere without process. Penis as in Fig. 165 ; elongate, slender,

straight; apex narrowed and pointed; base slightly expanded, bearing long, slender, paired anterior struts. Penis unicolored.

Distribution. Known only from one locality in Bolivia ( Fig. 181 ).

Biology. Not known.

Etymology. The epithet boliviensis (Latin) refers to the country in which it was collected, representing the only species of South American Deretaphrus .

Remarks. A holotype is here designated.

Type Locality. “Boyuibe to Charagua via. Cueva,” Santa Cruz Province, Bolivia .

Type Material Examined. H O L O T Y P E ( Figs. 191–192 ) (♂, USNM, pinned) label data: “ Bolivia S. Ana. G L Harrington Jul. 15-Sept.1 ’20 // Boyuibe to Charagua via. Cueva Ingri, etc. // USNM [handwritten]” [ USNM 68 NL, examined]. The abdomen [glued to a card, bearing a ♂ symbol] and genitalia [in glycerin in genitalia vial] are pinned beneath the specimen .

Figures

Figs. 57–65. Deretaphrus species, pronotum. 57) D. aequaliceps; 58) D. alveolatus; 59) D. analis; 60) D. antennatus;

Figs. 88–93. Deretaphrus species, elytra, dorsal and lateral views. 88–89) D. antennatus; 90–91) D. boliviensis;

Figs. 140–148. Deretaphrus species, phallobase. 140) D. aequaliceps; 141) D. alveolatus; 142) D. analis;

Figs. 165–172. Deretaphrus species, penis (left: dorsal view; right: lateral view; phallobase, to scale with penis). 165) D. boliviensis; 166) D. bucculentus; 167) D. gracilis; 168) D. hoplites; 169) D. ignarus; 170) D. oregonensis; 171) D. parviceps; 172) D. puncticollis.

Figs. 181–182. Distribution of Deretaphrus species. 181) D. boliviensis; 182) D. oregonensis.

Figs. 183–191. Primary type specimens and specimen labels of Deretaphrus species. 183–184) D. aequaliceps, lectotype, BMNH; 185–186) D. alveolatus, holotype, SAMA; 187–188) D. analis, lectotype, SAMA; 189–190) D. antennatus, holotype, WAMP; 191) D. boliviensis, holotype, USNM.

Figs. 192–200. Primary type specimens and specimen labels of Deretaphrus species. 192) D. boliviensis, holotype labels; 193–194) D. bucculentus, holotype, AMSA; 195–196) D. carinatus, holotype, WAMP; 197–198) D. erichsoni, lectotype, BMNH; 199–200) D. granulipennis, lectotype, MNHN.

Figs. 48–53. Deretaphrus species, head capsule, ventral view, showing setae and shape of submentum. 48) D. ignarus;