Angusta, Wang & Wei, 2024

Wang, Jiali & Wei, Cong, 2024, Angusta gen. n. of the cicada tribe Leptopsaltriini, with description of a new species from China (Hemiptera: Cicadidae), Zootaxa 5403 (5), pp. 571-586 : 574

Angusta gen. n.

Type species. Angusta fangtingyui sp. n., by present designation.

Etymology. The genus name is a Latin feminine adjective meaning “slender”, signifying the slender body of the type species. The gender is feminine.

Diagnosis. Body small and slender. Head including eyes wider than the base of mesonotum. Pronotum longer than head and distinctly shorter than mesonotum excluding cruciform elevation, lateral part of pronotal collar not dentate. Forewing and hindwing hyaline, with eight and six apical cells, respectively. Abdomen longer than the distance from head to cruciform elevation in both sexes; timbals mostly concealed by timbal covers in dorsal view; male opercula short, widely separated and slightly longer than wide, not extending the posterior margin of abdominal sternite II. Neither abdominal sternite III nor IV in male with tubercle-like projections. Pygofer with dorsal beak and distal shoulders; upper lobes of pygofer absent; basal lobes of pygofer present; uncus with a small lateral lobe on each side in addition to paired uncal lobes.

Remarks. Angusta gen. n. has the following common characters with taxa of Euterpnosiina (e.g., Miniterpnosia Lee, 2013 , Paranosia Lee, 2014 , Yezoterpnosia Matsumura, 1917 and Euterpnosia Matsumura, 1917 ): lateral part of pronotal collar not dentate; basal portion of RA 2 vein of forewing almost equal or slight longer than the apical portion of RA 2 vein; male abdominal sternites without tubercle-like projections; male opercula short, scarcely reaching or extending just beyond posterior margin of sternite II; basal lobe of pygofer present. Accordingly, Angusta gen. n. is assigned to Euterpnosiina of Leptopsaltriini . Angusta gen. n. can be distinguished from Miniterpnosia by the larger timbal cover and the uncus which has a small lateral lobe on each side in addition to the two uncal lobes. This new genus can be distinguished from Paranosia by the head including eyes being wider than the base of mesonotum, the presence of marginal series of minute fuscous spots on apices of longitudinal veins of apical cells, and the uncus with a small lateral lobe on each side in addition to the two uncal lobes. Angusta gen. n. can be distinguished from Yezoterpnosia by the smaller body size, the male opercula which are separated widely from each other, the posterior margin of male abdominal tergite III which is narrower than mesonotum, the large basal lobes of pygofer, and the uncus which has a small lateral lobe on each side in addition to the two uncal lobes. Angusta gen. n. can be distinguished from Euterpnosia by the larger timbal covers, the absence of molar-like projections laterally on the segment IV of the male abdomen, and the uncus which has a small lateral lobe on each side in addition to the two uncal lobes.

In addition, Angusta gen. n. is similar to Puranoides of Leptosemiina with the following common characters: lateral pronotal collar not dentate; male opercula small, widely separated; timbal cover well developed. But it can be distinguished from Puranoides by the node of forewing not swollen (big and slightly swollen in Puranoides ), the M 3+4 vein of the forewing distinctly curved (nearly straight in Puranoides ), and the uncus with a small lateral lobe on each side in addition to the two uncal lobes (uncus simple, wide, with blunt bicuspid apex in Puranoides ). A. fangtingyui gen. & sp. n. is also morphologically similar to Minipomponia (type species: Pomponia littldollae Boulard, 2002 ) but can be distinguished by the bifurcated paired uncal lobes together with the lateral lobe on each side (uncus simple in Minipomponia ).