Peltocercyon latifossus Mai, Jia, Ryndevich
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publication ID |
https://doi.org/10.11646/zootaxa.5671.1.1 |
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publication LSID |
lsid:zoobank.org:pub:60D33D8C-BDC2-4C2A-B840-90014815E8CB |
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DOI |
https://doi.org/10.5281/zenodo.16981910 |
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persistent identifier |
https://treatment.plazi.org/id/1032930E-FF98-6B31-FF2C-25C1B5A8EF81 |
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treatment provided by |
Plazi |
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scientific name |
Peltocercyon latifossus Mai, Jia, Ryndevich |
| status |
sp. nov. |
Peltocercyon latifossus Mai, Jia, Ryndevich , Angus & Fikáček sp. nov.
Figs 13A–F View FIGURE 13 , 14A–D View FIGURE 14 .
Type material examined. Holotype: male ( NMP), “SUMBA-CENTRAL / LEWA env. 300–500 m. n. m / 3– 5.1.2002, P. Votruba lgt” . Paratypes: 2 males, 2 females ( NMP, NHMUK), same data as the holotype .
Diagnosis. Length 3.4–3.8 mm. Dorsum dark brown to black with posterior half of elytra yellow brown ( Fig. 13A View FIGURE 13 ). Pronotum with uniform crescent-shape punctures. Elytra shiny, spaces between ground punctation smooth. Mentum with sparse fine punctures ( Fig. 14A View FIGURE 14 ). Posterior tentorial pits forming large depressions ( Fig. 14A View FIGURE 14 ). Prosternum tectiform medially, smooth throughout; middle portion not demarcated by ridges; prosternal process pointed posteriorly ( Fig. 14B View FIGURE 14 ). Antennal grooves rather broad ( Fig. 14B View FIGURE 14 ). Mesoventral plate spindle-shaped. Arcuate ridge of metaventrite strongly bent backwards and distinct ( Fig. 14C View FIGURE 14 ). Lateral areas of metaventrite without coarse punctures ( Fig. 14C View FIGURE 14 ). First abdominal ventrite without longitudinal sculpture basally ( Fig. 14D View FIGURE 14 ). Male genitalia ( Fig. 13D–F View FIGURE 13 ): paramere slightly widened subapically and then gradually narrowing towards apex, apex bluntly pointed and slightly curved inwards; inner face of the paramere with a fringe of long setae subapically and with several apical setae ( Fig. 13D, F View FIGURE 13 ). Median lobe widest in the base, gradually narrowing towards apex; apex bluntly pointed ( Fig. 13E View FIGURE 13 ).
Description. Form and Colour ( Fig. 13A–C View FIGURE 13 ). Total length 3.1–3.5 mm; maximum width 1.8–2.0 mm. Body broadly oval, not parallel-sided in the middle, moderately convex. Dorsum shiny, dark brown to black; posterior half of elytra yellow brown, gradually blurring with the anterior black part. Maxillary and labial palpi yellowish brown; antennae yellowish brown with club darker. Prosternum, hypomeron, epipleuron and metepisternum yellowish brown; metaventrite dark brown to black; abdominal ventrites yellowish brown, except first ventrite dark brown to black basally. Legs yellowish brown.
Head. Dorsal surface with uniform dense and fine crescent-shaped punctures; interstices between punctures smooth. Anterior margin of clypeus with a marginal bead. Eyes of moderate size, separated by ca. 5× the width of one eye. Mentum subtrapezoid, ca. 1.5× as wide as long, moderately depressed anteromedially; anterior margin of mentum slightly concave; with fine and sparse punctures ( Fig. 14A View FIGURE 14 ). Posterior tentorial pits forming two large depressions ( Fig. 14A View FIGURE 14 ). Antennae with 9 antennomeres; antennal club (antennomeres 7–9) compact and densely pubescent. Maxillary palpomere 2 strongly swollen in apical half, longer than palpomere 3; palpomere 4 almost symmetrical, slightly longer than palpomere 3. Each maxilla with a sucking-disc shaped appendage in male.
Thorax. Pronotum widest posteriorly, gradually narrowed anteriad, with finer and sparser crescent-shaped punctures than those on head. Lateral margins of pronotum narrowly rimmed, the rim overlapping anterior and posterior corners, anterior and almost all of posterior margin without rim. Prosternum gradually raised and tectiform medially; prosternum smooth throughout; prosternal process pointed posteriorly ( Fig. 14B View FIGURE 14 ). Antennal grooves broad, outer lateral margin strongly convex ( Fig. 14B View FIGURE 14 ). Mesoventral plate spindle-shaped and elongate, surface slightly convex and shining; ca. 6 × as long as wide, posterior apex overlapping the anterior ridge of metaventrite in a single point ( Fig. 14C View FIGURE 14 ). Scutellar shield triangular, longer than wide, with punctures finer than those on pronotum. Elytra widest at anterior third; each elytron with 10 rows of punctate striae, striae moderately impressed; striae 6, 8 and 9 not reaching anterior margin of elytron; stria 10 short, only ending at posterior third of elytron; intervals of striae flat, with fine ground punctures, intervals between punctures smooth. Epipleuron wedge-shaped and strongly oblique at anterior half of elytron. Central area of metaventrite uniformly punctate and bare, lateral areas of metaventrite densely pubescent and without coarse punctures; anterior ridge of metaventrite strongly bent backwards at anterolateral corner and forming an arcuate ridge; metaventrite with complete femoral lines crossing anterolateral arcuate ridges and reaching anterolateral corners of metaventrite ( Fig. 14C View FIGURE 14 ). Anterior ridge of metaventrite continuous with the arcuate ridge at the crossing point ( Fig. 14C View FIGURE 14 ).
Legs. Profemora bare ventrally, with very fine punctures; mesofemora with coarser setiferous punctures than those on metafemora. Tibiae with small lateral spines. Tarsi with sparse gold ventral setae, first metatarsomere about as long as metatarsomeres 2–3 combined.
Abdomen. Abdominal ventrites densely pubescent. First ventrite sharply carinate medially, without longitudinal sculptures basally ( Fig. 14D View FIGURE 14 ).
Male genitalia. Paramere widest basally, gradually narrowing towards apical fourth, slightly widened and then gradually narrowing towards apex; apex of paramere bluntly pointed, slightly curved inwards; inner face of paramere with a fringe of long setae subapically and several apical setae ( Fig. 13D, F View FIGURE 13 ). Phallobase slightly shorter than parameres; nearly parallel sided, manubrium gradually narrowed and asymmetrical at the base ( Fig. 13D, F View FIGURE 13 ). Median lobe widest basally, gradually narrowing towards apex and bluntly pointed; gonopore triangular, situated subapically ( Fig. 13E View FIGURE 13 ). Sternite 9 was not examined (missing in specimens dissected by previous researcher).
Biology. Unknown.
Etymology. The species name combines the Latin latus (broad) and fossa (groove), referring the broad antennal grooves and two large depressions on posterior tentorial pits of head of this new species.
Remarks. This new species can be distinguished from other species of this genus by the combination of following morphological characters: (1) dorsum dark brown to black with posterior half of elytra yellow brown ( Fig. 13A View FIGURE 13 ), (2) prosternum tectiform and without lateral ridges ( Fig. 14B View FIGURE 14 ), and (3) posterior tentorial pits forming two large depressions ( Fig. 14A View FIGURE 14 ).
Distribution ( Fig. 45 View FIGURE 45 ). Indonesia (Sumba).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.