Gauromaia (Celebesa) angustior ( 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 : 543-545

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

( Figs 3 , 6–8 , 11B, D )

= Celebesa purpurea Pic, 1921 syn. nov. ( Figs 7C–E )

Celebesa angustior : Pic 1921: 23 (description).

Celebesa purpurea : Pic 1921: 23 (description); Ando 2011: unnumbered plate 1 fig. i (misidentification).

Type material examined. Celebesa angustior . Lectotype MNHN [herewith designated, sex unknown]: S. Celebes Patumuang Jan.1896 H. Fruhstorfer. [printed, black frame] // Muséum Paris Coll. M. Pic [printed] // SYNTYPE [printed, label red] // Syntype Celebesa angustior Pic, 1921 [printed] // MNHN, Paris EC20359 [printed, supplemented with a QR code]; Paralectotype 1 specimen MNHN [not sexed]: S. Celebes Patumuang Jan.1896 H. Fruhstorfer. [printed, black frame] // C. angustior n sp [handwritten] // angustior Pic [handwritten] // TYPE [printed, label red] // Muséum Paris Coll. M. Pic [printed] // SYNTYPE [printed, label red] // Syntype Celebesa angustior Pic, 1921 [printed] // MNHN, Paris EC20358 [printed, supplemented with a QR code]; Paralectotype 1 specimen MNHN [not sexed]: S. Celebes Patumuang Jan.1896 H. Fruhstorfer. [printed, black frame] // Muséum Paris Coll. M. Pic [printed] // SYNTYPE [printed, label red] // Syntype Celebesa angustior Pic, 1921 [printed] // MNHN, Paris EC20360 [printed, supplemented with a QR code]; Paralectotype 1 specimen MNHN [not sexed]: S. Celebes Patumuang Jan.1896 H. Fruhstorfer. [printed, black frame] // Muséum Paris Coll. M. Pic [printed] // SYNTYPE [printed, label red] // Syntype Celebesa angustior Pic, 1921 [printed] // MNHN, Paris EC20361 [printed, supplemented with a QR code].

Type material examined. Celebesa purpurea . Lectotype MNHN [herewith designated, not sexed, presumably a female]: Lompa-Battau 3000´März 1896 H. Fruhstorfer [printed, black frame] // type [handwritten] // purpurea n sp [handwritten] // purpurea Pic [handwritten] // Muséum Paris Coll. M. Pic [printed] // TYPE [printed, label red] // SYNTYPE [printed, label red] // Syntype Celebesa purpurea Pic, 1921 [printed] // MNHN, Paris EC 20365 [printed, supplemented with a QR code] .

New material examined. 1 specimen BMNH: Celebes. 96-120. [handwritten] ; 1 specimen BMHH: Celebes. G. Heinrich. B. M. 1933-117. [printed] // Celebes Bantimoeroeng 8. 1931 G Heinrich [printed, label yellow] ; 1 ♂ DTPC: INDONESIA, Sulawesi, South Sulawesi Prov., Palopo 12 km NWW, Battang vill., 2°57’S, 120°05’E, 07.I. 2018, 770 m, disturbed lowland rainforest, day collecting [printed] ; 2 ♂ & 1 ♀ DTPC: INDONESIA, Sulawesi, South Sulawesi Prov., Palopo 12 km NWW, Battang vill., 2°57’S, 120°05’E, 24.I.2018, 800‒900 m, disturbed lowland rainforest, day collecting [printed] .

Synonym. The type material of Gauromaia (C.) angustior and G. (C.) purpurea appears conspecific in the external morphology, including the shape of pronotum and mentum, the shape and structure of prosternal intercoxal process, and the slightly convex elytral interstriae.

Redescription. Total body length 11–14 mm (syntypes G. (C.) angustior ) and 11 mm (syntype G. (C.) purpurea ). Body subcylindrical in dorsal view. Dorsum and venter glabrous and glossy. Head subrectangular in dorsal view and flattened in lateral aspect, slightly glossy. Left mandible apex bidentate, right mandible apex shortly notched.Terminal labial palpomere elongate subtriangular. Terminal maxillary palpomere securiform. Mentum trapezoid, widened anteriorly, flattened in ventral aspect or with longitudinally elevated central portion and slightly impressed lateral portions along of it. Epistoma subtrapezoid, broadly emarginate at anterior margin. Epistomal suture forms vague impression (epistoma fused to frons). 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 short, slightly bulged dorso-laterally and immediately constricted posteriad, approximately as long as dorsal eye length. Interfacetal setae not present. Labrum subtruncate at anterior margin, with row of short, orange, anteriad-directed setae. Head dorsal punctures circular to slightly elliptical, variably dense, becoming smaller towards epicranial ‘neck’. Tiny, scale-like seta raises from centre of each puncture, not surpassing margin of corresponding puncture. Intervening spaces variable wide, smooth to 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.Antennomere III is longest among six basal antennomeres, antennomere II is shortest among them. Antennomeres V and VI slightly inflated. Antennomeres VII–XI strongly widened and flattened, truncate to barely emarginate at distal margin. Terminal antennomere apically broadly rounded, ~ 1.4× as long as penultimate antennomere. Pronotum transverse, slightly convex in dorsal aspect, subopaque. Pronotal length to maximum width ratio ~ 0.8–0.9.Anterior margin subtruncate, posterior margin slightly sinuous. Anterolateral angles rounded, posterolateral angles nearly right-angled in dorsal view. Anterior pronotal edge shortly margined at anterolateral angles, sulcus broadly interrupted medially. Posterior and lateral edge of pronotum margined, including at posterolateral angles. Lateral margin of pronotum visible in dorsal view. Pronotal disc dorsally on basal portion with a track of vague transverse impression.Transition of pronotal disc to hypomeron carinate. Dorsal pronotal punctures, intervening spaces and setation similar as those on head. Anterior margin of pronotum with a row of short, dense yellowish setae. Prothoracic hypomeron barely punctured. Scutellar shield broadly triangular, obtusely pointed apically, glossy and glabrous. Elytra subcylindrical, slightly convex in dorsal aspect, slightly widened laterally in posterior 1/3, glossy and glabrous. Elytral length to maximum combined width ratio ~ 1.3–1.6. Humerus obsolete, no humeral callosity present. Lateral margin of elytron slightly deflected, visible from above at around midlength. Deflection continues to anterior margin of elytron near humerus in a form of shallow impression. Elytron with eight moderately deep longitudinal striae and a short, inconspicuous scutellar stria; punctures in striae not visible. Complete striae one and two nearly reach elytral apex. Interstriae slightly convex. Ratio width of elytra across humeri through apex of scutellar shield versus basal width of pronotum across posterolateral angles ~ 1.1–1.2. Epipleuron broad in humeral area, narrows posteriad, stretches nearly to elytral apex. Procoxa widely separated, prosternal intercoxal process rather wide, distinctly margined laterally and (in some paralectotypes) at anterior edge of procoxal cavity, flattened to slightly convex in lateral view, declivous at posterior extent of procoxal cavity, touches posterior margin of prosternum and apically rounded. Mesoventrite shallowly V-shapely impressed antero-ventrally, its lateral margins not elevated, apex emarginate to 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 0.4–0.5. Metathoracic discrimen distinct, incomplete. Metacoxal cavities broadly separated by moderately 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, 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 arched in lateral view, pretarsal claws with short empodium. Basal metatarsomere much shorter than the combined length of remaining tarsomeres.

Sexual dimorphism. Female elytra stronger widened, body shape more obese than in male, protibia comparatively less curved.

Ecology. Species of lower to mid-montane rainforests.

Distribution. Southern arm of Sulawesi (Central and Southern Sulawesi provinces).

Figures

FIGURE 3. Gauromaia subgenus Celebesa Pic, 1921, adult morphology. A–G. (C.) sp., ♀ from Central Sulawesi Province, dorsal forebody; B–G. (C.) angustior (Pic, 1921) comb. nov., ♀ from near Battang village, South Sulawesi (DTC), dorsal forebody; C–ditto, mentum and mouthparts, ventral view; D–ditto, lateral forebody; E–Pro-, meso-, and metathorax, ventral view [not to scale].

FIGURE 6. Gauromaia (Celebesa) angustior (Pic, 1921) comb. nov., adult habitus. A–C–Lectotype in dorsal (A), lateral (B) and ventral (C) view; D–F–Paralectotype No 1 in dorsal (D), lateral (E) and ventral (F) view [images courtesy Christophe Rivier, MNHN].

FIGURE 7. Gauromaia (Celebesa) angustior (Pic, 1921) comb. nov., adult habitus. A–Paralectotype No 2, habitus, dorsal view; B–Paralectotype No 3, habitus, dorsal view; C–E–G. (C.) purpurea (Pic, 1921), syn. nov. of G. (C.) angustior, lectotype, dorsal (C), lateral (D) and ventral (E) view [images courtesy Christophe Rivier, MNHN].

FIGURE 8. Gauromaia (Celebesa) angustior (Pic, 1921) comb. nov., dorsal habitus, specimens from near Battang village, South Sulawesi (DTC).

FIGURE 11. Gauromaia Pascoe, 1866 species, genitalia.A–G.(s. str.) dives Pascoe, 1866, ♀ from Sumatra (BMNH), ovipositor, entire view and apex (magnified); B–G. (Celebesa) sp., ♀ from Tambusigi, Central Sulawesi (BMNH), ovipositor, entire view and apex (magnified); C–G. (Falsogauromaia) annulipes (Pic, 1921), ♀ from Crocker Range, Sabah (BMNH), ovipositor, entire view and apex (magnified); D–G. (Celebesa) angustior (Pic, 1921) comb. nov., ♀ from near Battang village, South Sulawesi (DTC), aedeagus in ventral, lateral and dorsal view [not to scale]. Abbreviations:A1–Gonostylus; A2–Coxite lobe 4; A3–Coxite lobe 3; A4–Coxite lobe 2; A5–Coxite; A6–Paraproct and a connecting membrane; B1–Gonostylus; B2–Coxite lobe 4; B3– Coxite lobe 3; B4–Coxite lobe 2; B5–Coxite lobe 1; B6–Paraproct and a connecting membrane; C1–Gonostylus; C2–Coxite lobe 4; C3–Coxite lobe 3; C4–Coxite lobe 2; C5–Coxite lobe 1; C6–Paraproct and a connecting membrane.