Deretaphrus carinatus 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 : 23-25

Deretaphrus carinatus Lord and McHugh , new species

( Figs. 36 , 63 , 94–95 , 146 , 174 , 195–196 )

Diagnosis. This species can be readily distinguished from congeners by the strongly and evenly

carinate elytral interstitial intervals 3–9, with even carinate intervals ending before odd intervals, the posterior face of abdominal ventrite V with a distinct dorsal point when viewed posteriorly, the head with well-developed, laterally expanded supra-ocular ridges, and strongly protuberant eyes. It most closely resembles D. antennatus , but we feel this group is distinct enough to warrant a new species. In D. carinatus , the pronotal median longitudinal groove is more strongly developed with a slightly depressed anterior portion, the interstitial intervals of the elytra are more strongly carinate, the antennal club segments bear minute setae, the anterior apical angle of antennomere 11 lacks a patch of minute, erect setae, the club segments are asymmetrical but with expanded portions of the leading edge rounded and not distinctly angulate, the head has distinct laterally expanded supra-ocular ridges, the eye is strongly protuberant, the anterior margin of the submentum is sinuate, and the apex of abdominal ventrite V bears a distinct dorsal point.

Description. L e n g t h 8 –11. 5 m m. Wi d t h 2.4 –3.2 mm. Body elongate, parallel, dark red to black; dorsal surface glabrous, matte to moderately shiny; ventral surface moderately shiny, glabrous except for minute setae that arise from punctures. Head ( Fig. 36 ): In dorsal view, narrowed anteriorly, dorsal surface subtriangular; with laterally expanded supra-ocular ridges; eyes partially concealed from above; eye strongly protuberant, not uniformly convex; punctures fairly dense. Frontoclypeal suture distinct. Clypeus distinctly narrower than head. Anterior margin of clypeus incised medially. Submentum strongly produced anteroventrally over oral cavity, mentum completely concealed, only apices of palpi visible, if at all. Submentum shape similar to Fig. 52 ; narrowly separated from subgenal braces, without paired setose pits; anterior margin sinuate. Antennal groove well-developed, impunctate internally. Antenna minutely setose, appearing glabrous; segments 3–8 with a single transverse row of minute setae. Antennal club segments with minute setae. Antennal club asymmetrical, leading edge of club segments distinctly curved, much more inflated than trailing edge, trailing edge straight. Dorsal surface (external face) of mandible without median setose groove. Thorax ( Fig. 63 ): Pronotum large, slightly impressed medially, distinctly tapering to base, widest near anterior margin; dorsal surface convex, deflexed near anterior and posterior angles; anterior margin straight; anterior angles distinctly pronounced, nearly right angles; base narrower than elytral bases; posterior margin weakly sinuate; posterior angles with small denticle; lateral margin arcuate, slightly to moderately sinuate, with incomplete carina, forming a distinct raised margin in dorsal view. Pronotal disc with large, deep, round to oval punctures. Pronotal median longitudinal canal present, distinct, interrupted to form a small, narrow anterior portion and a long posterior portion; anterior portion a small slit, surrounding area slightly depressed; posterior portion wide, shallow at base, abruptly tapering anteriorly to a narrow, more distinctly impressed canal. Hypomeron sparsely punctate, punctures large, round, and deeper than punctures of pronotal disc. Lateral walls strongly deflexed, subparallel. Prosternum flat medially, strongly deflexed at lateral margin. Tergosternal suture more or less straight. Mesoventrite impunctate medially, punctures increase in size towards posterolateral corners. Punctures on metaventrite increase in size anterolaterally. Elytra ( Figs. 94–95 ): Elytron slightly flattened dorsally; interstitial intervals 3–9 distinctly carinate for entire length, shiny; raised even intervals not as long as odd intervals, ending before apex; raised odd intervals nearly extending to apical margin; interval 3 more strongly raised near apex; interval 4 more strongly raised in apical half. Basal elytral margin with interstitial intervals 3 and 5 each ending in a knob-like protuberance; protuberance on interval 5 merges with finger-like callosity on elytral shoulder. Legs: Femur and tibia with short, sparse setae; inner face of tibia with small setae near apical portion. Tarsus sparsely setose except for 2 pockets of dense setae on the ventral surface at the apex of tarsomeres 1–3. Abdomen: Posterior face of ventrite V with a distinct dorsal point when viewed posteriorly, present in both sexes. Punctures on abdominal ventrite I distinctly sparser anteriorly. Intercoxal process impunctate. Punctures on abdominal ventrites increase in size anteriorly. Aedeagus: Phallobase as in Fig. 146 . Tegmen consisting of paired, subtriangular plates at middle; plates narrowly touching medially. Basal piece with short anterolateral struts; struts slightly curved anteriorly. Parameres moderately short, broadly rounded, well-separated and individually articulated to phallobase, internal lateral margins arcuate; paramere sparsely setose with short setae at apical margin; dorsal surface of paramere with moderately developed, subtriangular process; process evenly curved, narrowing anteriorly, slightly shorter than half the length of the paramere, apex slightly swollen; processes narrowly separated, parallel medially. Penis similar to Fig. 169 ; short, moderately thick, more or less straight; apex narrowed and pointed; base slightly expanded, bearing short, paired anterior struts. Penis bicolored, lighter in basal 1/3.

Variation. The degree of carination of the interstitial intervals of the elytra varies slightly within this species. The lateral margins of the pronotum range from more or less evenly curved

to slightly sinuate. The size of the supra-ocular ridge on the head and degree of protuberance of the eyes is also somewhat variable.

Distribution. Australia: Northern Territory, South Australia, Victoria, and Western Australia ( Fig. 174 ). Deretaphrus carinatus is the most widely distributed species of the genus.

Biology. Several specimens were collected from under the bark of Eucalyptus .

Etymology. The epithet carinatus (Latin, carina = keel) refers to the distinct carination of elytral interstitial intervals 3–9.

Remarks. A holotype is here designated and deposited in the WAMP. Six paratypes are here designated and deposited in the ANIC, SAMA, NZAC, and QDPI.

Type Locality. Narrogin , Western Australia .

Type Material Examined. H O L O T Y P E ( Figs. 195–196 ) ( WAMP, card-mounted) label data: “36-3562 Narrogin [hand-written] // Western Australian Museum Entomology Reg. no. 65194 [yellow label]” [ WAMP 13 NL, examined]. Sex not determined. PARATYPE ( ANIC, cardmounted) label data “Pinjarra, W.A. E. Goerling ” [ ANIC 241 NL, examined]. Sex not determined. PARATYPE ( ANIC, pinned) label data “Beverley, W.A. F.H. du Boulay // D. gracilis Blkb [in Carter’ s hand] Det. H.J. Carter ” [ ANIC 31 NL, examined]. Sex not determined. PARATYPE ( ANIC, pointed) label data “ 30.40S 118.55E 38km NNW of Bullfinch, WA. 20 Sep. 1981 A.A. Calder // under bark Eucalyptus ” [ ANIC 132 NL, examined]. Sex not determined. PARATYPE ( SAMA, cardmounted) label data “Geraldton & Mullewa W.A., Lea // D. fossus Newm HJC [in Carter’ s hand]” [ SAMA 43 NL, examined]. Male. Abdomen and genitalia are dissected and in glycerine in a vial below specimen. PARATYPE ( QDPI, pointed) no label data [ QDPI 15 NL, examined]. Female. Abdomen and genitalia are dissected and in glycerine in a vial below specimen. PARATYPE ( NZAC, pointed) label data: “ Mullewa Miss F. May // D. ignarus Pasc HJC [in Carter’ s hand] // typical sp. of a common sp. [in Carter’ s hand] // F.E. Wilson Collection ” [ NZAC 2 NL, examined]. Female. Abdomen and genitalia are dissected and in glycerine in a vial below specimen .

Additional Material Examined (13). AUSTRALIA: NORTHERN TERRITORY: Henbury, Finke River Gorge ( ANIC 199 NL). SOUTH AUSTRALIA: Serpentine Lakes, East side ( SAMA 234–235 NL); Yelpawaralinna HW ( SAMA 170 NL); no locality ( MAMU 4 NL). VICTORIA: Kerang ( AMSA 38 NL); no locality ( ANIC 41 NL). WESTERN AUSTRALIA: Nedlands (Perth) ( HNHM 6 NL, HNHM 10 NL); Roebourne ( SAMA 37 NL). NO LOCALITY: ( HNHM 14 NL, MNHUB 58 NL, QDPI 19 NL).

Figures

Figs. 35–41. Deretaphrus species, head. 35) D. bucculentus, dorsal view; 36) D. carinatus, dorsal view; 37) D. incultus, dorsal view; 38) D. parviceps, dorsal view; 39) D. rodmani, dorsal view; 40) D. ocularis, dorsal view; 41) D. ocularis, lateral view.

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

Figs. 94–99. Deretaphrus species, elytra, dorsal and lateral views. 94–95) D. carinatus; 96–97) D. erichsoni;

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

Figs. 173–174. Distribution of Deretaphrus species. 173) D. alveolatus, D. antennatus, D. parviceps, and D. rodmani;

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;

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.