Endelomorphus, Bílý, 2007

Bílý, Svatopluk, 2007, New genus and species of the subtribe Anthaxomorphina Hołyński, 1993 from Eastern Indonesia, with taxonomic and bionomical notes on the genus Anthaxomorphus Deyrolle, 1864 (Coleoptera: Buprestidae: Aphanisticini), Zootaxa 1583 (1), pp. 43-50 : 43-45

Endelomorphus gen. nov.

( Figs. 1, 2, 4, 6–8 )

Type species: Endelomorphus biakensis sp. nov. (present designation).

Diagnosis. Body flattened, slightly wedge-shaped, finely microsculptured, completely asetose ( Figs. 1 , 7, 8 ); hind femora conspicuously swollen, all femora with only very shallow and wide groove for tibiae in repose; tarsomeres 1–4 with well-developed adhesive pads; body-shape resembling that of some short and stout species of the genus Endelus Deyrolle, 1865 .

Description. Head wide, frons feebly concave, frontoclypeus as wide as long, delta-shaped, not separated from frons; eyes nearly reniform, their inner margins only very slightly S-shaped; antennae short, antennomeres 6–10 trapezoid, nearly twice as wide as long; sculpture of head consisting of very fine microsculpture and sparse, simple punctures.

Pronotum regularly convex, about twice as wide as long and as wide as elytra; anterior pronotal margin twice deeply incurved, medial lobe wide and strongly projecting anteriad; posterior pronotal margin deeply bisinuose with large and wide prescutellar lobe; lateral margins rounded, very finely denticulate; anterior pronotal angles sharp, posterior angles widely rounded. Scutellum wide, triangular, much wider than long.

Elytra slightly wedge-shaped, regularly convex with poorly developed humeral swellings and without basal, transverse depression; elytral apices narrowly and separately rounded with very fine lateral serration; elytral sculpture homogenous consisting of fine microsculpture and shallow, wide punctures which are transversely enlarged on basal half of elytra; epipleura well-developed and well-limited by sharp carina but not reaching elytral apex.

Ventral side lustrous, very finely microsculptured only with indistinct, very sparse puncturation; anal ventrite ( Fig. 4 ) obtusely rounded with transverse, preapical depression. Legs relatively short, hind tibiae straight with wide, external, preapical incurvation armed with characteristic comb of bristles and with group of external, apical spines ( Fig. 6 ); first tarsomere of hind tarsi as long as tarsomeres 2 and 3 together. Claws hookshaped with large and obtuse basal tooth.

Aedeagus ( Fig. 2 ) flattened, widened apically, medial lobe flat, robust, widely bilobed apically, with deep medial groove.

Etymology. The genus name Endelomorphus (masculine) is derived from the genus name Endelus and Greek substantive morf ē (shape) to stress the external similarity with some species of Endelus .

Differential diagnosis. There is no doubt that the genus Endelomorphus gen. nov. is closely related to the genus Anthaxomorphus (see the paragraph “Taxonomical notes on the genus Anthaxomorphus ” below) from which it differs in the following characters: frontoclypeus as wide as long, delta-shaped (much wider than long in Anthaxomorphus ), frons slightly concave with simple, fine puncturation on microsculptured backround and without any knoll-shaped elevations (roughly wrinkled and with nearly concentric wrinkled sculpture on two large frontal knolls in Anthaxomorphus ), both pronotum and elytra regularly convex (uneven or with more or less developed, blister-shaped elevations in Anthaxomorphus ), anal ventrite, in addition to sternal groove, transversely impressed apically in both sexes ( Fig. 4 ) (only with simple sternal groove in Anthaxomorphus – Fig. 5 ) and by completely different male genitalia with obtuse tips of parameres and robust, apically bilobed medial lobe (male genitalia of Anthaxomorphus species are rather uniform with acuminate parameres and slender, acuminate medial lobe – compare Figs. 2, 3 and Figs. 2 and 3 in Williams & Weir, 1992). Also the bionomy of both genera seems to be different: larvae of Endelomorphus biakensis gen. nov., sp. nov. develope in leaves of Euphorbiaceae (genus Macaranga Thouras ; Fig. 9 ) unlike larvae of Anthaxomorphus which are leaf-miners on Moraceae (genus Ficus Linnaeus ; Fig. 10 ).

Figures

FIGURES 1–6. Fig. 1, Endelomorphus biakensis gen. nov., sp. nov., holotype, male, 3.3 mm; Fig. 2, the same, aedeagus, holotype; Fig. 3, Anthaxomorphus papuanus Deyrolle, 1864, aedeagus; Fig. 4, E. biakensis gen. nov., sp. nov., anal ventrite, holotype; Fig. 5, A. papuanus, anal ventrite; Fig. 6, E. biakensis gen. nov., sp. nov., right metatibia, holotype. Scale bars: a – 1 mm; b – 0.5 mm.

FIGURES 7–10. Fig. 7, Endelomorphus biakensis gen. nov., sp. nov., holotype, male, 3.3 mm; Fig. 8, the same, allotype, female, 3.4 mm; Fig. 9, Macaranga sp. (Euphorbiaceae), host plant of E. biakensis gen. nov., sp. nov. (Biak, Adidakam); Fig. 10, Ficus wassa Thouras (Moraceae), host plant of Anthaxomorphus papuanus Deyrolle, 1864; three leaves in the lower part of the plant with old larval mines (Biak, Adidakam).