Longipectus circulus Yu et Liu H., 2025
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publication ID |
https://doi.org/10.11646/zootaxa.5723.3.6 |
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publication LSID |
lsid:zoobank.org:pub:FB18CF17-B727-41BF-B5B4-173A98F73882 |
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persistent identifier |
https://treatment.plazi.org/id/03907146-2171-1E05-D1AB-7F8BFE85FE4E |
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treatment provided by |
Plazi |
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scientific name |
Longipectus circulus Yu et Liu H. |
| status |
sp. nov. |
Longipectus circulus Yu et Liu H. , sp. nov.
( Figure 2–3 View FIGURE 2 View FIGURE 3 ).
( urn:lsid:zoobank.org:act:)
Type material. Holotype: MHBU-ORT-0001, A female fossil in the present study is well preserved, except that the posterior margin of the wings is not clear. Specimen deposited at the Museum of Hebei University (MHBU), Baoding, China.
Locality and horizon. The lowermost Cenomanian, middle Cretaceous. Myanmar: An amber-mine near Tanai Village in the Hukawng Valley.
Diagnosis. As for genus.
Etymology. The species name was derived from the Latin for “ circulus ” (circular figure, ring, hoop), referring to its subrounded head.
Description. Head hypognathous, slightly longer than wide; frontal tubercle flat, smooth; vertex smooth, exist some irregular dark spots; eyes large, ovoid, outer protruding slightly; interocular distance large, twice the width of the scape; scape cylinder, longer and thicker than pedicel; pedicel pyriform, basal width near two-thirds of scape; both sides of frontoclypeal sulcus are straight, middle little upward curved; maxillae laciniae curved inward, distal with three denticles, galea large, with hair; maxillary palpi only three segments visible distally, the length ratio 1.58: 1: 1.08, the apical segment clavate, distally enlarged; labial palpi with three segments, segment ratio 2.42: 1: 1.33, two distal segments have an enlarge apices ( Fig. 2A, B, C View FIGURE 2 ).
Pronotum saddle-shaped, smooth, with some irregular dark spots; length of disc more than half of body, cover wings base and most of abdomen; anterior and middle area of disc almost flat, posterior area distinctly convex, posterior margin prolonged and reached metafemur middle, lateral margins roundly bent into paranota; anterior margin of lateral lobe slightly flat, anterior lower angles widely rounded, lower margin rather drops backward, posterior lower angles nearly rounded, posterior margin widely arc concave ( Fig. 2A, B,C View FIGURE 2 ).
Tegmina membranous and narrow, distinctly extending over apex of metafemora; CP straight and raise to anterior margin, parallel with ScA; ScP almost fused with RA medially, two cross-veins between ScA and ScP; stem R+M+CuA divided into RA and RP+M+CuA in basal, between RA and the anterior margin have a narrow, dark pterostigma and two branches, three cross-veins between RA and RP; RP separated basally at approximately one-third its length, straight, with six distal longitudinal branches, between two branches with one or two cross-veins; M diverged from RP and forked into three branches: MA1, MA2, MP; MA1 diverged from RP basal third, three cross-veins present between MA1 and the closest RP branches, MA2 diverged in basal fourth, three cross-veins between MA1 and MA2, MP diverged in basal fifth approximately, with a cross-vein between MA2 and MP, three branches end in posterior margin; CuPa divided into CuPaα and CuPaβ posterior to the origin of RP+M+CuA form, CuPaα fused with RP+M+CuA short distance and separated from RP+M, CuA+CuPaα curves downward, far from MP; CuPaβ down curved, fused with CuPb, CuPaβ+CuPb merged with CuA+CuPaα, at last, 1A fused with CuA+CuPaα+CuPaβ+CuPb, end in posterior margin; hindwing slightly longer than tegmina ( Fig. 3C, D View FIGURE 3 ).
Legs covered with short hairs, metafemora with dark spots. Pro- and mesofemora with a pair of round apical lobules; pro- and mesotibiae have a pair of ventral apical spurs and round lobule; pro- and mesotarsomere I slightly longer than III, I half of distal ventral have stout spine-like setae and a pair of apical spurs; pro- and mesotarsomere II short, with a pair of ventral apical spurs; pro- and mesotarsomere III simple; metafemora long and stout; metatibiae slightly shorter than metafemora, with a single proximal dorsal spur and three pairs of large, spine-like dorsal spurs, have two pairs of apical spurs, one pair large spurs located dorsal, the other one little smaller ventrally; metatarsomere I as twice long as the length of III, with three spine-like ventral spines, a pair of different sizes apical spurs, the outer spur longer and stronger than inner; metatarsomere II very short, with a small apical lobe; metatarsomere III simple ( Fig. 2A,B,D View FIGURE 2 , 3A View FIGURE 3 ).
Abdomen distinctly short, distal approximately reached to near two-thirds the length of the metafemora; cercus slender, with dense short hairs, setae distributed uniformly; ovipositor developed, sword-like, extended to metafemora distal, curved upward, ventral distal margin with uniformly distributed denticles, distal acuity ( Fig. 2A, B View FIGURE 2 , 3B View FIGURE 3 ).
Measurements. Length of body 2.95 mm; body with wings 6.20 mm; body with cercus 3.50 mm; eyes long 0.84 mm, wide 0.63 mm; scape 0.19 mm long, 0.15mm wide; pedicel 0.12 mm long, 0.10 mm wide; every antennomere
0.05-0.06 mm long, 0.03-0.05 mm wide; the length of 3 visible distally segments maxillary palpi from basal to distal are 0.19 mm, 0.12 mm, 0.13 mm; labial palpi three segments length from basal to distal is 0.29 mm, 0.12 mm and 0.16 mm; length of pronotum 1.74 mm; lateral lobe 1.00 mm high; abdomen 1.53 mm long; cercus long 0.69 mm; ovipositor length 1.53 mm; profemora 1.00 mm long, 0.20 mm wide; mesofemora 1.38 mm long, 0.26 mm wide; protibiae 0.78 mm long, 0.08 mm wide; mesotibiae 1.06 mm long, 0.10 mm wide; protarsomere I 0.34 mm long, 0.04mm wide; mesotarsomere I 0.42 mm long, 0.07 mm wide; metafemora 2.63 mm long and 0.73 mm wide; metatibiae 2.57 mm long; ds1-ds4 long 0.31, 0.58, 0.57, 0.51 mm; metatarsomere I 0.90 mm long, 0.10 mm wide; metatarsomere II 0.08 mm wide; metatarsomeres III 0.51 mm long and 0.06 mm wide; tegmina 4.65 mm long, 1.14 mm wide.
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.