Epicharmeropsis hexavenulosus Huang, Ren & Shih, sp. nov.
Creators: name: Huang, Jiandong
name: Ren, Dong
name: Shih, Chungkun
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Ephemeroptera
Hexagenitidae
Epicharmeropsis
Epicharmeropsis hexavenulosus

description: Epicharmeropsis hexavenulosus Huang, Ren & Shih, sp. nov.
(Fig. 1–4.)
Etymology. Latin prefix hexa- (six) and venulosus (veinlet).
Holotype. CNU-E-YX-2007001-1, CNU-E-YX-2007001-2 (Fig. 1–3). Well preserved part and counterpart of imago; antennae and tarsi of middle and hind legs are not preserved; the Late Jurassic to the Early Cretaceous, Yixian Formation, Shimen Village, Yangshuling Township, Pingquan County, Hebei Province, China.
Material. Holotype and from the same locality, paratypes: male imago, No. CNU-E-YX-2007021-1, No. CNU-E-YX-2007021-2; male imago, No. CNU-E-YX-2007023; male imago, No. CNU-E-YX-2007024; male imago, No. CNU-E-YX-2007025-1, No. CNU-E-YX-2007025-2; female imago, No. CNU-E-YX- 2007004 (Fig. 4.).
Diagnosis. In addition to the diagnosis for the new genus, the species can be diagnosed as follows: CuA1 of forewing with 6 triads (loop-shaped veinlets) leading to wing margin.
Description. Male imago (dorsal view) (Fig. 1–3.).
Eyes relatively large, contiguous. Pterothorax well-developed; mesonotal suture (MNs) in anterior part of mesonotum strongly stretched backwards medially, not transverse; paired medioparapsidal sutures (MPs) jointed at middle area of mesonotum, not parallel; metanotum long, with evident scutum.
Forewing: broad and triangular with costal brace; costal margin slightly curved; tornoapical (outer) margin longer than basitornal (anal) margin; costal area relatively wide, narrowing toward tip; RA subparallel to SC; membrane slightly thickened at distal part of the field between C and RA; RSa formed two triads, RSp non-branched; MA branched after middle area of wing; MA1 and MA2 uniformly diverging; iMA approximated MA2; MP1 and MP2 diverged at an angle of approximately 30 degree; distinct intercalary veins existing between MP2 and CuA1; CuA bifurcated to CuA1 and CuA2, from the bifurcation a vein iCu formed 6 triads following one another: anterior branch of each triad forms next triad; each of these triads has anterior branch arched by its convexity anteriorly; all branches of these triads go to basitornal margin of wing.
Hind wing: broad with fairly obtuse tip; venation relatively profuse; the base of C strongly arched, far from SC; subcostal area broad, more than 3 times as wide as costal area; RA terminated near wing apex; RS formed triad RSa-iRS-RSp, RSa and RSp non-branched; MA bifurcated near middle; MP bifurcated near the base of wing; iMP approximated with MP1; CuA and CuP un-forked; more than 4 A present; anal area broad; numerous crossveins and intercalary veins near wing margin.
Legs (preserved): relatively sturdy and long; femora longer than tibia; three-segmented tarsi of fore legs preserved, slender; tarsi of middle and hind legs absent.
Abdomen: the posterolateral projections of the ninth segment, very long and sharp, nearly as long as the tenth abdominal tergum.
Paracercus, very short; cerci, long.
Female imago (Fig. 4.). Eyes relatively small, separate; mouth apparatus vestigial, only anterior margin of the frons forming a projected lamella; coxa, trochanter and femur of fore and middle legs preserved, sturdy; the posterolateral projections of the ninth segment not extended posterolaterally. Other characters are as in male.
Male and female subimagoes, and nymph are unknown.
Measurements (mm). Holotype: body length (excluding caudalii) 31.0 (head length 3.0, pronotum length 0.5, pterothorax length 9.5, abdomen length 18.0); forewing length 34.0, its width 14.0; hind wing length 18.0, its width 11.0; length of fore leg fragment 27.0 (femur 9.0, tibia 7.0, first tarsus 4.0, second tarsus 5.0, third preserved tarsus 2.0); femora of middle and hind legs 6.0; tarsi of middle and hind legs 5.0. Paratype: female imago No.CNU-E-YX-2007004, forewing length 34.0, its width 14.5.
description: Published as part of Huang, Jiandong, Ren, Dong & Shih, Chungkun, 2007, New genus and species of Hexagenitidae (Insecta: Ephemeroptera) from Yixian Formation, China, pp. 39-50 in Zootaxa 1629 on page 41, DOI: 10.5281/zenodo.179369