Sinacroneuria lateralis, Sivec & Stark, 2020

Sivec, Ignac & Stark, Bill P., 2020, Systematic notes on Sinacroneuria Yang & Yang, 1995 (Plecoptera: Perlidae), with descriptions of two new species from China, Zootaxa 4732 (4), pp. 580-584 : 582-583

Sinacroneuria lateralis , sp. nov.

( Figs. 2 a–2f)

Material examined. Holotype ♂ from China, Fujian Province, Kuatun , 2300 m, 28 April 1938, J. Klapperich ( ZFMK).

Adult habitus. Triocellate. General color brown with darker markings. Wings pale brown with darker veins ( Fig. 2d ).

Male. Forewing length 18 mm. Tergum 9 bearing a small, raised mesal lobe and a sparse patch of sensilla basiconica; tergum 10 slightly notched on anteromesal margin and bearing a faint dark median line narrowly dividing large sensilla basiconica patch ( Fig. 2a ). Paraprocts broadly triangular, flattened but with strongly recurved, spinelike tips ( Figs. 2a, 2b ). Hammer small, oval and set near posterior margin of sternum 10 ( Fig. 2c ). Y-stem of aedeagal sclerite shorter than arms, laterally compressed and blunt apically; arms ca. 1.3 times as long as stem, strongly narrowed to a stiletto-type shape in apical half; lateral projections very prominent ( Fig. 2f ).

Etymology. The species name refers to the prominent lateral projections of the aedeagal sclerites.

Diagnosis. This species is distinguished from related congeners by the strongly projecting extensions present at the bases of the aedeagal arms. In addition, tergum 9 bears a slight, median dome sparsely covered with sensilla basiconica ( Fig. 2a ).

Figures

FIGURE 2. Sinacroneuria lateralis male holotype terminalia, aedeagus and wing. a. Male terminalia, dorsal. b. Male paraproct, dorsal. c. Male terminalia, ventral. d. Wing. e. Male aedeagal stem apex. f. Male aedeagal sclerite, dorsal.