Gauromaia (Celebesa) striata (Pic, 1923) Telnov & Ruzzier, 2024

Telnov, Dmitry & Ruzzier, Enrico, 2024, A redefinition of Gauromaia Pascoe, 1866 (Coleoptera: Tenebrionidae: Stenochiinae), Zootaxa 5551 (3), pp. 531-555 : 550-551

Gauromaia (Celebesa) striata (Pic, 1923) comb. nov.

( Figs 10D–F )

Celebesa striata : Pic 1923a: 23 (description); Ando 2011 (unnumbered plate 1 fig. k, misidentification).

Type material examined. Syntype 1 specimen MNHN [not sexed]: S. Celebes Lompa-Battau 3000´März 1896 H. Fruhstorfer [printed, black frame] // type [handwritten] // 151 [handwritten] // Celebesa striata n sp [handwritten] // striata Pic [handwritten] // Muséum Paris Coll. M. Pic [printed] // TYPE [printed, label red] // SYNTYPE [printed, label red] // Syntype Celebesa striata Pic, 1923 [printed] // MNHN, Paris EC20366 [printed, supplemented with a QR code].

Redescription. Total body length 14 mm (syntype). Body elongate in dorsal view. Dorsum and venter glabrous. Head subrectangular in dorsal view, flattened in lateral aspect, glossy. Left mandible apex bidentate, right mandible apex shortly notched. Terminal labial palpomere elongate subtriangular. Terminal maxillary palpomere securiform. Mentum poorly preserved (deformed), transversely subrectangular, possible with indistinct impression on each side of the slightly longitudinally elevated (in ventral aspect) median portion. Epistoma subtrapezoid, broadly emarginate at anterior margin. Epistomal suture present. 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 in lateral view, anterior margin broadly emarginate at insertion of canthus. Tempus short, slightly bulged dorso-laterally and immediately constricted posteriad, ~ 1/3 dorsal eye length. Interfacetal setae not present. Labrum subtruncate at anterior margin, with a row of short, orange, anteriad-directed setae. Head dorsal punctures circular, variably sparse. Dorsal setation not observed (this might be because of the non-perfect conservation of the specimen). Intervening spaces much wider than punctures, smooth. Antenna 11-segmented with the 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. Antennomere III is longest among six basal antennomeres, antennomere II is shortest among them. Antennomere VI slightly inflated. Antennomeres VII–XI strongly widened and flattened, truncate to barely emarginate at distal margin. Terminal antennomere apically broadly rounded, ~ 1.7‒1.8× as long as penultimate antennomere. Pronotum transverse, slightly convex in dorsal aspect, glossy. Pronotal length to maximum width ratio is ~ 0.9. Anterior pronotal margin subtruncate, posterior margin very broadly rounded. Anterolateral angles rounded, posterolateral angles nearly right-angled in dorsal view. Anterior pronotal edge shortly margined at anterolateral angles, margin broadly interrupted medially. Posterior and lateral edge of pronotum margined, including at posterolateral angles. Lateral margin of pronotum visible in dorsal view. Transition of pronotal disc to hypomeron carinate. Dorsal pronotal punctures, intervening spaces and setation similar as those on head; punctures somewhat denser. Prothoracic hypomeron barely punctured, glossy. Scutellar shield small, triangular, obtusely pointed posteriorly, glossy and glabrous. Elytra distinctly elongated, convex in dorsal aspect, widened laterally postmedium, glossy. Base of elytra narrowly transversely impressed in lateral aspect. Elytral length to maximum combined width ratio 1.7–1.8. Humerus broadly rounded, no humeral callosity observed. Lateral margin of elytron slightly deflected, visible from above at elytral apex. Each elytron presenting eight shallow longitudinal striae and a short, inconspicuous scutellar stria; interstriae convex; striae impunctate. Stria I conjoins lateral margin of elytron at elytral apex, stria II joining stria eight at elytral apex. Elytral setae not observed. Ratio width of elytra across humeri through apex of scutellar shield versus basal width of pronotum across posterolateral angles 1.1. Epipleuron broad in humeral area, narrows posteriad, stretches nearly to elytral apex. Procoxa widely separated, prosternal intercoxal process rather wide, distinctly margined laterally and at anterior edge of procoxal cavity, step-like shaped at posterior extent of procoxal cavity in lateral view and with distinct preapical ventral hump, touches posterior margin of prosternum and with subtruncate apex. Mesoventrite flat, its lateral margins not elevated, somewhat convex ventrally between mesocoxae, apex emarginate between mesocoxal cavities. Mesanepisternum separated from mesoventrite and mesepimeron by distinct suture. Mesocoxa broadly separated by short, broad, apically obtuse angulate intercoxal process of metaventrite. Metaventrite convex in ventral aspect. Median length to maximum width of metaventrite ratio ~ 0.44. Metathoracic discrimen distinct, incomplete. Metacoxal cavities broadly separated by long, apically 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, curved in apical 1/3. Meso- and metatibia shorter than corresponding femur, 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. Unknown.

Ecology. Unknown.

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

Figures

FIGURE 10. Gauromaia subgenus Celebesa Pic, 1921, adult morphology. A–C–G. (C.) latipennis (Pic, 1921) comb. nov., syntype in dorsal (A), lateral (B) and ventral (C) view; D–F–G. (C.) striata (Pic, 1923) comb. nov., syntype in dorsal (D), lateral (E) and ventral (F) view [images courtesy Christophe Rivier, MNHN].