Amphinemura cordiformis Li & Yang

Li, Weihai & Yang, Ding, 2006, Three new species of Amphinemura (Plecoptera: Nemouridae) with a key to the species from Guizhou Province, China, Zootaxa 1154, pp. 41-48 : 42-43

Amphinemura cordiformis Li & Yang , sp. nov.

( Figs. 1–5 )

Diagnosis

Dorsal sclerite of epiproct with a pair of longitudinal straps bilaterally and a cordiform projection. Outer lobe of paraproct finger­like with acute tip; median lobe strongly directed proximally and curved outward posteromedially into a large hook, with many tiny black spines along its tip.

Description

MALE. Forewing length 8.5 mm, hindwing length 7.1 mm.

Head, antennae, mouthparts and thorax dark brown; compound eyes dark. Wings hyaline; legs dark brown except femora brown. Abdomen brownish; hypoproct and cerci brownish yellow; hairs on abdomen mostly pale.

Terminalia. ( Figs. 1–5 ): Tergum nine weakly sclerotized except along anterior margin which is distinctly sclerotized, rather constricted medially, with large triangular midanterior incision and narrow mid­posterior indention, with two bundles of black tiny spines posteromedially. Sternum nine with slender vesicle; hypoproct rather wide basally, then distinctly tapering toward papillate tip. Tergum ten weakly sclerotized, except anterior and posterior margins which are distinctly sclerotized, with large, shallow median concavity, bearing several tiny black spines along anterolateral margin. Cerci slightly sclerotized, longer than wide, slightly produced medially. Epiproct with dorsal sclerite bearing a pair of longitudinal straps bilaterally and a cordiform projection, with its inner margin sclerotized as two dark belts; ventral sclerite long and narrow in dorsal view, forming a triangular keel, bearing many black spines ventrally. Paraprocts divided into three lobes: outer lobe heavily sclerotized, about as long as inner lobe, finger­like and with acute tip; median lobe distinctly sclerotized, strongly directed proximally and curved outward posteromedially into a large hook, with many tiny black spines along its tip; inner lobe weakly sclerotized, much shorter than median lobe, with inner margin quite straight.

FEMALE: Unknown.

Distribution

China (Guizhou).

Etymology

The Latin name of this species refers to the shape of the cordiform, or heart­shaped, projection on the dorsal sclerite of the epiproct.

Remarks

The new species is similar to A. guangdongensis from Guangdong in the shape of the paraprocts, but may be separated from the latter by comparing the dorsal sclerite of the epiproct which bears a heart­shaped bulge and the median lobe of the paraprocts with a single tip. In guangdongensis , the epiproct has the dorsal sclerite separated as two long spine­like processes, and the median lobe of the paraproct has a bifurcate tip ( Yang, Li & Zhu, 2005).

Figures

FIGURES 1 – 5. Amphinemura cordiformis sp. nov. 1. Male genitalia, dorsal view. 2. Male genitalia, ventral view. 3. Epiproct, dorsal view. 4. Epiproct, lateral view. 5. Right paraproct, caudal view.