Deretaphrus interruptus Grouvelle, 1903

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 : 36-37

Deretaphrus interruptus Grouvelle, 1903

( Figs. 42 , 45, 47 , 49 , 70 , 108–109 , 153 , 180 , 216–217 )

Deretaphrus interruptus Grouvelle, 1903: 184 . Fauvel 1903: 341; Heinze 1943: 119.

Diagnosis. This species can be readily distinguished from congeners by the New Caledonian distribution, the shape of the submentum, and the posterior portion of the pronotal median longitudinal canal tapering posteriorly. It most closely resembles D. hoplites and can be distinguished by the characters given in the diagnosis for that species.

Redescription. Length 6.0– 11.9 mm. Width 2.5–3.3 mm. Body elongate, parallel, dark red to black; dorsal surface glabrous, moderately 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 not distinct, arcuate anteromedially. Anterior margin of clypeus slightly arcuate medially. Clypeus with a row of long erect setae. Submentum shape as in Fig. 49 ; narrowly separated from subgenal braces, with paired setose pits; anterior margin sinuate, strongly produced anteroventrally over oral cavity, mentum completely concealed. Antennal groove well-developed, impunctate. Antenna moderately setose; segments 2–4 with a single transverse row of short setae; segments 5–11 with long, golden setae that extend beyond distal margin of antennal segment from which they arise. Antennal club segments 9–10 with 2 transverse rows of setae, penultimate segment with a single transverse row of setae arising near the distal margin of the segment. Antennal club subsymmetrical. Dorsal surface (external face) of mandible with median setose groove. Thorax ( Fig. 70 ): Pronotum elongate, widest near anterior ¼; dorsal surface flattened along longitudinal midline, convex laterally; anterior margin slightly sinuate, slightly wider than head; anterior angles rounded; base narrower than elytral bases; posterior margin slightly sinuate; posterior angles with small denticle; lateral margin with incomplete carina, forming a distinct raised border in dorsal view. Pronotal disc with small, relatively dense punctures. Pronotal median longitudinal canal well-developed, interrupted to form a small, anterior fovea and a posterior canal; raised interruption of the canal impunctate; anterior fovea ovoid, deepest posteriorly; posterior canal wide, deeply impressed, smooth; internal lateral margins not grooved; posterior canal rounded and closed anteriorly, open posteriorly. Hypomeron with large, shallow, dense punctures in middle, margins smooth; strongly deflexed medially. Prosternum flat medially, strongly deflexed at lateral margin. Tergosternal suture more or less straight. Elytra ( Figs. 108–109 ): Elytron convex; punctures of elytral puncture rows 2, 3, and 4 abruptly increasing in size towards the apex; interstitial intervals 3 and 5 feebly raised, more pronounced near apex; intervals 7 and 9 raised for entire length, interval 7 more prominent. Raised intervals with micropunctures at crest. Basal elytral margin with intervals 3 and 5 each ending in a knob-like protuberance; protuberance of interval 5 merges with finger-like callosity on the elytral shoulder. Legs: Base of femur and trochanter with long, 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 simple. Aedeagus: Phallobase as in Fig. 153 . 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, narrowly separated and individually articulated to phallobase, internal lateral margins arcuate; paramere sparsely setose with short setae at apical margin; dorsal surface of paramere with short subtriangular process; process thickest at base, narrowing apically, about as long as 1/3 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. Other than the expected variation in size, the sculpture of this species varies little. More material may reveal additional variation.

Distribution. New Caledonia ( Fig. 180 ).

Biology. Eleven specimens were collected in association with the larvae of Agrianome fairmairei ( Coleoptera : Cerambycidae ) under the bark of dead Aleurites moluccana (Euphorbiaceae) .

Remarks. Grouvelle (1903) did not mention the number of specimens examined. In order to stabilize this name, a lectotype and two paralectotypes are here designated from the syntype series of D. interruptus .

Type Locality. K a n a l a a n d O u r a i l, N e w Caledonia.

Type Material Examined. L E C T O T Y P E ( Figs. 216–217 ) ( MNHUB, card-mounted) label data: “Coll. R.I.Sc.N.B. [underline] Nouvelle Calédonie Ourail [“Ourail” is a label in Grouvelle’ s hand glued onto larger label] rec Lécard [handwritten] ex. coll. Fauvel [pink label] // Coll. A. Fauvel Deretaphrus interruptus Grouv. [“ Deretaphrus interruptus Grouv. is a label in Grouvelle’ s hand glued onto larger label] // LECTOTYPE Deretaphrus interruptus Gr S.A. Ślipiński 1989 [red border]” [ ISNB 1 NL, examined]. Sex not determined. PARALECTOTYPE ( MNHUB, card-mounted) label data: “Coll. R.I.Sc.N.B. [underline] Nouvelle Calédonie Kanala [“Kanala” is in Grouvelle’ s hand glued onto larger label] rec Bougier [handwritten] ex. coll. Fauvel [pink label] // Coll. A. Fauvel Deretaphrus interruptus Grouv. [handwritten] R.I. Sc.N.B. 17.673 // PARALECTOTYPE Deretaphrus interruptus Gr S.A. Ślipiński 1989 [red border]” [ ISNB 2 NL, examined]. Sex not determined. PARALECTOTYPE ( MNHN, card-mounted) label data: “N lle Caledon [in Grouvelle’ s hand on red label] // Type // interruptus 5. Grouv [in Grouvelle’ s hand] // PARALECTOTYPE [red label] // Deretaphrus interruptus Gr [handwritten] det. S.A. Slipinski ‘89” [ MNHN 2 NL, examined].

Additional Material Examined (14). N E W CALEDONIA: PROVINCE SOUTH: La Foa ( ANIC 302 NL, FSCA 23–25 NL); Mount Ouenarou ( ANIC 301 NL); Pocquereux ( SRFP 1–8 NL); Sarramea ( AAIC 4 NL).

Figures

Figs. 42–43. Deretaphrus species, head showing clypeal emargination, mandibular setae, and areas of metal incorporation. 42) D. interruptus, anterior view; 43) D. piceus, anterior view.

Figs. 44–47. Deretaphrus species, antenna showing setal density. 44) D. erichsoni, right antenna; 45) D. interruptus, right antenna; 46) D. puncticollis, left antennal club; 47) D. interruptus, left antennal club.

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

Figs. 66–74. Deretaphrus species, pronotum. 66) D. gracilis; 67) D. hoplites; 68) D. ignarus; 69) D. incultus;

Figs. 106–111. Deretaphrus species, elytra, dorsal and lateral views. 106–107) D. incultus; 108–109) D. interruptus;

Figs. 149–157. Deretaphrus species, phallobase. 149) D. gracilis; 150) D. hoplites; 151) D. ignarus; 152) D. incultus;

Figs. 179–180. Distribution of Deretaphrus species. 179) D. analis, D. bucculentus, D. hoplites, and D. lateropunctatus;

Figs. 210–218. Primary type specimens and specimen labels of Deretaphrus species. 210–211) D. ignarus, lectotype, BMNH; 212–213) D. pascoei, lectotype, ANIC; 214–215) D. incultus, lectotype, AMSA; 216–217) D. interruptus, lectotype, MNHUB; 218) D. iridescens, lectotype, BMNH.

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.