Metahelotella alatonotata, Huang & Gu, 2025
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publication ID |
https://doi.org/10.3897/zookeys.1258.171034 |
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publication LSID |
lsid:zoobank.org:pub:D8E8EF68-4D5A-408E-8088-3EE39312377A |
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DOI |
https://doi.org/10.5281/zenodo.17532413 |
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persistent identifier |
https://treatment.plazi.org/id/13FBBC52-F149-5237-9F42-2F6DA57AC31E |
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treatment provided by |
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scientific name |
Metahelotella alatonotata |
| status |
sp. nov. |
Metahelotella alatonotata sp. nov.
Figs 1 A – G View Figure 1 , 2 A – H View Figure 2
Type materials.
Holotype: China • ♂; Yunnan, Dehong, Yingjiang County, Mangyun Village ; 2023. V – VI; local collector leg.; SYSU . Paratype: China • 1 ♀; Yunnan, Gaoligong Mountains, Baihualing ; 2019. V. 22; local collector leg.; SYSU .
Differential diagnosis.
This species is similar to Metahelotella schawalleri Lee, 2009 , but can be easily distinguished by the combination of the following characters: elytral markings larger, not reaching suture; protibiae with green only at basal one-third; apical notch of tegmen deeper (Fig. 2 A View Figure 2 ); penis broader at the apex and more distinctly concave at mesal margin (Fig. 2 B View Figure 2 ) and apical margin of abdominal ventrite V slightly sinuate (Fig. 2 D View Figure 2 ). This species is also similar to M. semifulva ( Ritsema, 1881) , but can be distinguished by the different elytral color patterns and male genital structures.
Description.
Male. Body (Fig. 1 A, B View Figure 1 ) flat, surfaces shiny, sides nearly parallel. Eyes black; ventral surface, antennae and legs generally yellowish brown; head, apices of femora and bases of tibiae metallic green with a brownish sheen; tarsi reddish brown; pronotum yellowish brown with a greenish sheen; lateral margin of pronotum and elytra blackish brown; each elytron with one brownish markings from striae 1 to striae 8, reaching apical one-quarter but not reaching the basal margin; remaining areas yellowish green with metallic reflection.
Head triangular, distinctly constricted behind eyes; anterior margin densely covered by tiny punctures and remaining dorsal surface randomly punctate; ventral surface (Fig. 1 D View Figure 1 ) densely punctured on gular area, with even pubescence coverage, and genal area with dense elliptical punctures. Mentum (Fig. 1 D View Figure 1 ) transverse, nearly rectangular, with anterior margin concave. Antenna with 11 antennomeres, including a 3 - segmented club.
Thorax. Pronotum nearly trapezoidal, widest across posterior one-third; pronotal disc punctate, weakly convex, punctures denser and larger laterally; anterior angles obtuse, moderately protruding anteriad, posterior angles acute; anterior margin convex, slightly concave at middle; lateral margins weakly serrated, posterior margin distinctly bisinuate. Prothoracic hypomera with sparse punctures. Prosternum, meso- and metaventrites smooth, without punctures at middle. Scutellar shield glabrous, nearly semicircular, lateral margins truncate.
Elytra oblong, widest at basal two-fifths, parallel-sided at basal three-quarters, then gradually narrowing, with apices rounded; each elytron with 10 punctured striae, intervals flat, evenly covered with micro-punctures; lateral margins weakly bordered, apex of each elytron with 1–2 obscure notches (Fig. 1 F View Figure 1 ); epipleura wide, without punctures.
Legs. Femora surfaces smooth, weakly dilated. Protibiae (Fig. 1 E View Figure 1 ) curved, inner side notched and clothed with sparse pubescence on apical one-third. Tarsi simple, tarsomeres I – IV clothed with dense pubescence on ventral surface, tarsomere V longer than the combined length of tarsomeres I – IV.
Abdomen slightly convergent from abdominal ventrite I towards apex; abdominal ventrite V (Fig. 2 D View Figure 2 ) with sparse short setae at middle; apical margin slightly sinuate, with dense short setae that are densest at the apex. Abdominal tergite VIII (Fig. 2 C View Figure 2 ) subquadrate, antero-lateral angles rounded; apical margin truncate, with long setae.
Male genitalia. Penis (Fig. 2 B View Figure 2 ) elongate, with rounded lateral margins, narrowing towards the rounded apex, apical orifice elongate, elliptical (from basal fourth to apical fourth), with long subparallel lobes. Tegmen (Fig. 2 A View Figure 2 ) slender, apical margin with sparse apical setae and a relatively deep notch at middle, basal margin truncate. Internal sac (Fig. 2 E, F View Figure 2 ) with four sclerites basally, one dorsal sclerite long and slender, strongly curved, hooked at base, one ventral sclerite oblong, two paramedian sclerites short, basally expanded.
Measurements (in mm). BL 8.02, HL 1.22, HW 1.79, PL 1.86, PW 2.55, EL 5.30, EW 3.02, HL / HW 0.68, PL / PW 0.73, EL / EW 1.74.
Female (Figs 1 C, G View Figure 1 , 2 G, H View Figure 2 ). Similar to male but with body larger; protibiae straight, without notches; and elytral apices (Fig. 1 G View Figure 1 ) with 2–3 distinct teeth. Ovipositor short; paraproct and proximal gonocoxite moderately sclerotized; and distal gonocoxite and gonostylus elongated, slender, and well sclerotized (Fig. 2 G, H View Figure 2 ).
Measurements (in mm). BL 8.33, HL 1.28, HW 1.84, PL 1.88, PW 2.64, EL 5.45, EW 3.03, HL / HW 0.69, PL / PW 0.71, EL / EW 1.79.
Etymology.
The specific epithet is derived from the Latin words alatus and notatus, referring to its wing-like elytral markings.
Distribution.
China: Yunnan (Fig. 5 View Figure 5 ).
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.
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Cucujoidea |
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