Gauromaia (Celebesa) elongata ( Pic, 1921 ) Telnov & Ruzzier, 2024

Telnov, Dmitry & Ruzzier, Enrico, 2024, A redefinition of Gauromaia Pascoe, 1866 (Coleoptera: Tenebrionidae: Stenochiinae), Zootaxa 5551 (3), pp. 531-555 : 545-546

Gauromaia (Celebesa) elongata ( Pic, 1921) comb. nov.

( Figs 9A–C )

Celebesa elongata : Pic 1921: 23 (description).

Type material examined. Lectotype ♀ [herewith designated] MNHN: S. Celebes Lompa-Battau 3000´März 1896 H. Fruhstorfer [printed, black frame] // type [handwritten] // Celebesa n g. elongata n sp [handwritten] // elongata Pic [handwritten] // Muséum Paris Coll. M. Pic [printed] // SYNTYPE [printed, label red] // Syntype Celebesa elongata Pic, 1921 [printed] // MNHN, Paris EC20357 [printed, supplemented with a QR code].

New material examined. 2♂ BMNH: Tjamba. S. Celebes. [printed] // C.E.Tottenham Collection B.M. 1969‒77 [printed] .

Redescription. Total body length 16 mm (lectotype). Body subcylindrical. Dorsum and venter glabrous. Head subrectangular, subopaque, flattened in dorsal aspect. Left mandible apex bidentate. Terminal maxillary palpomere securiform. Mentum transversely subrectangular, flattened in ventral aspect. Canthus moderately developed, laterally not carinate, completely concealing antennal insertion and basal antennomere from above. Epicranial ‘neck’ wide, transition point from occiput not indicated. Eye strongly reniform, anterior margin broadly emarginate at insertion of canthus. Tempus moderate, slightly bulged dorso-laterally and immediately constricted posteriad, approx. dorsal eye length. Interfacetal setae not present. Head dorsal punctures circular to elliptical, variably dense, becoming smaller towards epicranial ‘neck’. Intervening spaces variable wide, microscopically wrinkled. Antenna 11-segmented with five terminal antennomeres composing club. Antennomeres III–IV slender, I–VI rather slender, glossy and nearly glabrous; antennomeres VII to XI variably strongly widened and dorso-laterally flattened, densely punctured and setose. Terminal antennomere apically broadly rounded. Pronotum transverse, moderately convex in dorsal aspect, moderately glossy. Pronotal length to maximum width ratio ~ 0.8 (this calculation is approximate since the only available syntype is in suboptimal condition). Anterior pronotal margin subtruncate, posterior margin slightly sinuous. Anterolateral angles rounded, posterolateral angles nearly right-angled in dorsal view. Posterior and lateral edge of pronotum margined, including at posterolateral angles. Lateral edge of pronotum visible in dorsal view, broadly rounded. Pronotal disc dorsally on basal portion with a track of vague transverse impression. Transition of pronotal disc to hypomeron carinate. Dorsal pronotal punctures somewhat larger than those on head dorsum, intervening spaces variable. Prothoracic hypomeron barely punctured. Scutellar shield broadly triangular, obtusely pointed apically, glossy and glabrous. Elytra elongate subcylindrical, slightly convex in dorsal aspect, slightly widened laterally in posterior 1/3, moderately glossy, glabrous. Elytral length to maximum combined width ratio ~ 1.5. Humerus obsolete, humeral callosity present, weak. Lateral margin of elytron slightly deflected, visible from above at humerus and near apex. Deflection continues to anterior margin of elytron near humerus in a form of shallow impression. Elytron with eight shallow longitudinal striae and short, inconspicuous scutellar stria; no visible punctures in striae. Complete striae I and II stretch to nearly elytral apex. Interstriae flat. Ratio width of elytra across humeri through apex of scutellar shield versus basal width of pronotum across posterolateral angles nearly 1.2 (this calculation is approximate since the only available syntype is in suboptimal condition). Epipleuron broad, stretches to elytral apex where it narrows. Procoxa widely separated, prosternal intercoxal process rather wide, flat, distinctly margined laterally and at anterior edge of procoxal cavity, step-like shaped in lateral view immediately beyond posterior margin of procoxal cavity, touches posterior margin of prosternum and apically subtruncate. Mesoventrite slightly transversely impressed antero-ventrally between mesocoxa, its lateral margins not elevated, median portion somewhat convex in ventral aspect, apex subtruncate between mesocoxal cavities. Mesanepisternum separated from mesoventrite and mesepimeron by distinct suture. Mesocoxa broadly separated by short, broad, apically rounded intercoxal process of metaventrite. Median length to maximum width of metaventrite ratio ~ 0.5. Metathoracic discrimen distinct, nearly complete. Metacoxal cavities broadly separated by moderately long, apically obtuse angulate to rounded intercoxal process of first abdominal ventrite. Last visible tergite and ventrite broadly rounded at posterior margin. Legs long, femora long and narrow, not clavate. Protibia subequal in length to profemur, slightly curved. Meso- and metatibia shorter than corresponding femur, slightly curved, slightly thickened distally. Tarsomeres ventrally each with a brush of dense orange setae. Penultimate tarsomere subcylindrical, not bilobate. Terminal tarsomere slightly curved, pretarsal claws with short empodium. Basal metatarsomere much shorter than combined length of remaining tarsomeres.

Sexual dimorphism. Male unknown.

Ecology. The studied syntype comes from a lower montane rainforest.

Distribution. Southern arm of Sulawesi (Southern Sulawesi Province).

Figures

FIGURE 9. Gauromaia subgenus Celebesa Pic, 1921, adult morphology. A–C–G. (C.) elongata (Pic, 1921) comb. nov., lectotype in dorsal (A), lateral (B) and ventral (C) view; D–F–G. (C.) impressa (Pic, 1923) comb. nov., syntype in dorsal (D), lateral (E) and ventral (F) view [images courtesy Christophe Rivier, MNHN].