Mesonemoura dilatata Du & Ji, 2015

Du, Yu-Zhou, Ji, Xiao-Yu & Wang, Zhi-Jie, 2015, Description of three new Chinese species of the genus Mesonemoura (Plecoptera: Nemouridae), Florida Entomologist 98 (1), pp. 130-130 : 130

publication ID

https://doi.org/ 10.1653/024.098.0122

persistent identifier

https://treatment.plazi.org/id/03FC87C8-FFF2-0F1F-FCB5-B442FAD480CD

treatment provided by

Felipe

scientific name

Mesonemoura dilatata Du & Ji
status

sp. nov.

Mesonemoura dilatata Du & Ji View in CoL , sp. nov. ( Figs. 1–4 View Figs )

MATERIAL EXAMINED

HOLOTYPE 3, CHINA, Tibet, Leiwuqi county, Jiasangka township , 25-VI-2009, N 31° 52.494' E 96° 17.573', 3,722 m asl, Leg. Qian Yu-Han GoogleMaps . PARATYPES, 2 33, the same data as holotype.

1 School of Horticulture and Plant Protection and Institute of Applied Entomology, Yangzhou University, Yangzhou 225009, China

2 Department of Horticulture, Suqian College, Suqian 223800, China

MALE

Head and antennae dark brown; pronotum dark brown, transverse oblong, with rugosities. Wings hyaline, veins brown. Legs brown, the middle of femora slightly brown.

Forewing length 6.3-6.5 mm, hind wing length 5.3-5.4 mm. Tergum 9 ( Fig. 2 View Figs ) slightly sclerotized, with a small, asymmetrical notch mid-posteriorly, bearing several spinules posteriorly. Tergum 10 sclerotized, with several spinules each side of middle line. Hypoproct ( Fig. 1 View Figs ) broad basally, abruptly tapering toward the apex; vesicle long, more than half length of hypoproct, length 3 × width, ventral membranous, but slightly sclerotized dorsally, sclerotized laterally. Paraprocts ( Figs. 1, 3 View Figs ) divided into 3 lobes; inner lobe small, slightly sclerotized, fused with middle lobe; median lobe broad basally, slightly sclerotized, branched into 2 portions, inside portion of median lobe membranous, bearing many hairs, fused with outer lobe, another portion sclerotized, slender, short- er than membranous portion; outer lobe slender, sclerotized, basal part recurved along basal of cerci, other part fused with membranous portion of median lobe. Epiproct ( Figs. 2, 4 View Figs ) long and narrow; dorsal sclerite mostly slightly sclerotized, apical portion membranous, extending over onto ventral sclerite; lateral sclerite slender, sclerotized; ventral sclerite slightly sclerotized, broad basally, tapering towards apex, apical portion inserted between folds of dorsal sclerite, the apex extended distally forming a long flagellum; the flagelliform projection sclerotized, slender, with a swollen membranous apex, length of the flagellum about 1.5 × length of the epiproct; epiproct ventral sclerite with 2 rows of spinules.

FEMALE

Unknown.

DISTRIBUTION

CHINA (Tibet Autonomous Region).

ETYMOLOGY

The Latin “ dilatata ” refers to the flagelliform projection with a swollen membranous apex.

REMARKS

This species is characterized by the flagellum of the epiproct being long and curved, forming a swollen membranous apex. The new species is close to M. spiroflagellata ( Wu 1973) in having the median lobe branched into 2 portions. But in M. spiroflagellata , the sclerotized portion is equal to the membranous portion, ventral sclerite of epiproct without spines, and the apex of flagellum narrow.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Plecoptera

Family

Nemouridae

Genus

Mesonemoura

Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF