TABLE 2 in A new species of the genus Ostrovus Ricker, 1952 (Plecoptera: Perlodidae) from northern Kyushu, Japan, with notes on the male drumming signal

TABLE 2. Characteristics of the species of the genus Ostrovus and the known distribution of each species. SpeciesHeadAntennaPronotumWing colorMaleFemaleKnownGeneral color pattern of the dorsalVentral colorScape colorPedicel colorcolorProjection on abdominal tergum 7Projection on abdominal tergum 8Shape of the weakly sclerotized area at abdominal tergum 9Shape of the sclerotized median support of the epiproctShape of a paraproctWidth of subgenital platePosterior edge of subgenital plateParaproct color in ventral viewdistribution in JapanOstrovus kyushuensis sp. nov.Dark brown, or Dark brown dark brown with a pale brown area near the ocelli and on the occiput (Figs. 1 & 2)Dark brown (Figs. 1 & 2)Dark brown or sometimes pale brown (Fig. 1)Dark brown with a median pale brown band (Figs. 1 & 2)Dark smoky, but the costal region whitish yellow (Fig. 1)Absence (Fig. 4)Projecting over onto tergum 9 (Figs. 4 & 5)Semi-ellipse, occupying 1/3 of the width of tergum 9 (Figs. 5 & 6)With a semicircular dorsal top and a beak-shaped apex in lateral view (Figs. 4 & 10 middle & 11)Round and protruded dorsally (Figs. 5 & 7)Wider than sternum 9 (Figs. 14 & 16)With a median shallow concave (Fig. 16)Pale brown, but the outer margin dark brown (Fig. 14)KyushuOstrovus mitsukonisDark brown with a yellow area outside of each ocellus and around the center of the occiput, not extending to the compound eyes (Fig. 22)Brown to dark brown or brown with a pale colored submentumDark brown (Fig. 22)Dark brown or sometimes yellowish brownDark brown with a median yellowish brown band, but rarely with a pale brown band (Fig. 22)Brown or sometimes dark brown. The costal region yellowPresence (Figs. 26 & 27)Projecting over onto tergum 9 (Figs. 26 & 27)T-like shape (Figs. 27 & 28)No projections near the apex. With a triangular protrusion near the base (Fig. 34 lower)Rounded square (Figs. 27 & 29)Wider than sternum 9 (Figs. 35 & 36)With a median shallow concave or sometimes two shallow concaves (Fig. 36)Pale yellowish brown, but the outer margin darker (Fig. 35)Honshu, Shikoku, KyushuOstrovus nikkoensisDark brown with a yellowish brown area at front of the anterior ocellus and on the occiput, extending to compound eyes (Fig. 23)Pale yellowish brown, but postgenae brown (Fig. 25)Dark brown (Figs. 23 & 24)Yellowish brown (Fig. 24)Dark brown with a median yellowish brown band, but a rarely with a pale brown band (Fig. 23)Dark smoky in the original description by Okamoto (1912) but brown in ethanol. The costal region yellowAbsence (Fig. 37)Projecting over onto tergum 9 (Figs. 37 & 38)I-like shape (Fig. 40)With rounded triangular dorsal and ventral tops in lateral view (Fig. 42 lower)Oval (Figs. 38 & 41)Wider than sternum 9 (Figs. 43 & 44)With a median shallow concave (Fig. 44)Pale brownHonshu