Perspicuusoperla lata, Chen, 2022
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publication ID |
https://dx.doi.org/10.3897/fr.25.81862 |
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publication LSID |
lsid:zoobank.org:pub:C905FCB0-7880-4990-931D-8BCC98CD85C3 |
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persistent identifier |
https://treatment.plazi.org/id/D6B8C72C-2175-49E4-9B03-56C4DDDA509A |
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taxon LSID |
lsid:zoobank.org:act:D6B8C72C-2175-49E4-9B03-56C4DDDA509A |
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treatment provided by |
by Pensoft |
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scientific name |
Perspicuusoperla lata |
| status |
sp. nov. |
Perspicuusoperla lata sp. nov.
Figs 1 View Figure 1 , 2 View Figure 2 , 3 View Figure 3 , 4 View Figure 4 , 5 View Figure 5
Etymology.
The specific epithet means ‘broad’ and is derived from Latin ' Perspicuusoperla lata ', refers to the broad female subgenital plate.
Type material.
Holotype male (No. CZT-PLE-MA11), deposited in the Insect Collection of Jiangsu University of Science and Technology (ICJUST). The specimen is well preserved, but its hindwings are covered by forewings.
Type locality.
Hukawng Valley, southwest Maingkhwan, Kachin State (26°20N, 96°36E), Myanmar, uppermost Albian-lowermost Cenomanian (mid-Cretaceous).
Description.
Macropterous (Fig. 1A-C View Figure 1 ); body long and stout, length (excluding antennae and cerci) ca. 7.5 mm, generally brown.
Head (Figs 1 View Figure 1 , 2A-C View Figure 2 ) short and wide, width three times longer than length, mostly dark brown, anterolateral and posterior margins pale. Triocellate, anterior ocellus large and elevated. Compound eye large, oval and strongly protruded laterad. Antenna brown and filiform, with 25 segments preserved, basal segments much shorter than wide, each antennal segment covered with dense short hairs. Maxillary palp slender, with five segments, apical segment unmodified. Labial palp short, length near 2/3 of maxillary palp, three-segmented, apical segment slightly shorter than second segment. Cervical gills invisible.
Pronotum (Figs 1A-B View Figure 1 , 2A-B View Figure 2 ) slightly narrower than head, transversely kidney-shaped, anterior margin longer than posterior margin, surface densely pubescent, with thick rugosity. Meso- and metanota mostly sclerotized, nearly as wide as pronotum. Legs mostly dark brown, femur longer and thicker than tibia (Fig. 1 View Figure 1 ); two giant tibial spurs present ventrally; first two tarsal segments shortest (Fig. 2D-F View Figure 2 ), euplantulae developed; third tarsal segment apically with long bristles; arolium without setae.
Wings (Figs 1 View Figure 1 , 3 View Figure 3 ) hyaline, veins dark brown. Forewings length ca. 10.0 mm. In right forewing (Fig. 3 View Figure 3 ), ScP reaching RA after ra-rp; h stout and with regular obliquity, another 12 crossveins present between Sc and the anterior margin; one extra crossvein present beyond ScP; RA not reaching wing apex; RP originating at basal ⅓ of RA and with three branches; two crossveins present between RA and RP; M forked at near half of wing length; at least six crossveins present between M and CuA; other longitudinal veins invisible. In left forewing (Fig. 3 View Figure 3 ), RA, RP and M similar to right forewing; two crossveins present between RA and RP; single crossvein present between RP and M; area between M and CuA with seven crossveins; CuA with four branches, two posterior branches fused basally; three crossveins present between CuA and CuP; CuP and AA1 simple; AA2 seems unforked and abruptly curved backwards at apical half. Hind wings length ca. 9.0 mm, veins invisible; anal area extremely broad, with multiple folds.
Abdomen (Figs 1 View Figure 1 , 4 View Figure 4 ) length ca. 4.5 mm, stout, generally brown. Abdominal terga unmodified; posterior margin of tergum 10 near truncate (Fig. 1A-B View Figure 1 ). Paraproct strongly sclerotized, thumb-shaped, two times longer than wide, apex blunt and curved (Fig. 4A-C View Figure 4 ). Subgenital plate originating from sternum 8, broad and rounded, lateral margins near parallel at anterior half; posterior margin of subgenital plate extended beyond posterior margin of tergum 10 (Fig. 4A-C View Figure 4 ). Cerci (Fig. 4A View Figure 4 ) membranous and dark brown, with 12 segments preserved; each segment covered with dense, moderately long bristles; boundaries of segments clear.
Egg mass (Figs 1 View Figure 1 , 4A View Figure 4 , 5A-B View Figure 5 ) composed of dozens of cylindrical eggs, diameter ca. 1.2 mm; posterior poles of all eggs stuck together in the center of egg mass, whereas collars of anterior poles pointing outward. Egg length ca. 0.75 mm, slender, slightly enlarged at middle (Fig. 5A-E View Figure 5 ). Chorion entirely membranous, transparent and smooth. Collar very short, narrow, simple and weakly sclerotized, boundary with chorion inconspicuous, inner area circular and medially depressed, forming a funnelform median channel (Fig. 5C-E View Figure 5 ). Anchor and pedicel absent.
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