Coloana Dworakowska, 1971

Yang, Meixia, Cao, Yanghui & Zhang, Yalin, 2014, Review of the leafhopper genus Coloana Dworakowska (Hemiptera: Cicadellidae: Typhlocybinae: Erythroneurini), Zootaxa 3802 (3), pp. 346-358 : 346-347

Coloana Dworakowska, 1971

Type species: Coloana cinerea Dworakowska

Coloana Dworakowska, 1971e: 346 ; Chiang & Knight, 1990a: 197

Body robust. Head slightly narrower than maximum width of pronotum, vertex with anterior margin subparallel to posterior margin, coronal suture distinct basally. Face broad, convex in profile, frontoclypeus with width subequal to length, lorum broad. Fore wing (Fig. 2a) semitransparent, first and third apical cell broad, second apical cell narrowest, nearly parallel-sided, fourth apical cell short and broad, no longer than half length of third; AA and AP veins distinct. Hind wing (Fig. 2b) venation as usual for Erythroneurini , RA vein present. Apex of fore and hind wings narrow.

Male 2S abdominal apodemes broad but short, not exceeding hind margin of 4th sternite. Anal tube well sclerotized at distal half, with two separate sclerites basally on lateral sides.

Genital capsule spherical, pygofer side broad, provided with numerous hairlike setae scattered at lower caudal margin and group of hairlike setae at lower basal angle, with several microsetae scattered on inner membrane near caudal margin; inner membrane with narrow dorsal edge and broad longitudinal cephalic edge (Figs 8b, c) well sclerotized (this character and the sclerotization of anal tube can be greatly ignored when abdomen is weakly sclerotized or over disposed in KOH solution); dorsal appendages slender, fused to the pygofer side basally; ligament (Fig. 8e) well pigmented, articulated with basal sclerite of anal tube. Subgenital plate long and narrow, obviously exceeding hind margin of pygofer side, with prominent angulate projection subbasally bearing group of hairlike setae and several rigid microsetae, with row of rigid microsetae marginally and numerous hairlike setae scattered from near base to apex, with about two macrosetae near subbasal projection. Style slender, apex footlike, transversely rugose, preapical lobe small. Connective shieldlike, length longer than width. Aedeagal shaft thin tubular, curved dorso-cephalad, with unpaired dorsal process apically; usually preatrium small, dorsal apodeme moderately developed; gonopore subapical, on ventral surface.

Remarks. This genus can be distinguished with other Erythroneurini by bearing numerous hairlike setae on pygofer side and subgenital plate. In the original ( Dworakowska, 1971) and following ( Chiang & Knight, 1990) descriptions of Coloana , the external morphology resembles that of Imbecilla Dworakowska, 1970 . Whereas examination of both genera and other related genera indicates that Coloana ( Figs 1a, b , 2a, b) is similar to Thaia Ghauri, 1962 ( Figs 1 c–f) rather than Imbecella ( Figs 1 g–j) in view of the body size, shape of vertex and fore wing venation. Body size of Coloana and Thaia are relatively larger, length of vertex in midline shorter than half of the pronotum, fourth apical cell short, not reached apex of fore wing; Imbecilla is smaller, length of vertex as long as or longer than half of the pronotum, fourth apical cell long, reached apex of fore wing.

Distribution. China (Guangdong, Guangxi, Hainan, Taiwan, Yunnan); India; Thailand; Vietnam.

Figures

FIGURE 1. a, b. Coloana arcuata Dworakowska, 1981; c – f. Thaia subrufa (Motschulsky, 1863); g – j. Imbecilla cretinica Dworakowska, 1974; a, c, g. anterior dorsum (crown, pronotum and mesonotum); b, d, h. face; e, i. fore wing; f, j. hind wing.