Leptocerus suwannarati Laudee and Malicky, 2018

Laudee, Pongsak & Malicky, Hans, 2018, Five new species of Caddisflies (Trichoptera: Insecta) from Upper Tenasserim Range, Thailand and Myanmar, Zootaxa 4524 (3), pp. 351-358 : 355-356

Leptocerus suwannarati Laudee and Malicky n. sp.

Figs. 17–21

Type material. Holotype male ( PSUNHM). Thailand: Prachuap Khiri Khan Province, Kuiburi National Park, Kui Buri , 12°04’52”N, 99°37’43”E, ca. 150 m a.s.l., 2 February 2016, leg. Pongsak Laudee.

Etymology. Named for Asst. Prof. Wasin Suwannarat who is the Vice President of Prince of Songkla University, Hat Yai Campus.

Description. Length of each male forewing 6.0 mm; specimens in alcohol with head, thorax, abdomen, and legs light brown. Forewings white.

Male genitalia ( Figs. 17–21 ). Segment IX in lateral view flask-like, longitudinally short (narrow) dorsally and long (expanded) ventrally, rounded basoventrally, projected apicoventrally; in dorsal view with small sharp projection anteriorly and rounded excision posteriorly; in ventral view transverse anterior margin nearly straight, posteriorly with deep V-shaped incision nearly dividing venter into two parts. Preanal appendages reduced to pair of setal patches on posterodorsal submesal margins of segment IX. Segment X divided into pair of long, slender rods, slightly diverging through most of their length and then curved ventrad and slightly asymmetrically mesad apically. Inferior appendages stout, protruding upward, fused basally with U-shaped space between them in ventral view; each with middle portion broader and with short setae on mesal margin especially in ventral view, distal portion rounded apically in lateral view, in ventral view narrow and curved slightly mesad subapically, blunt apically. Phallus tubular with long slender acute spine dorsally in lateral view, torpedo-shaped with very long slender spine in ventral view.

Diagnosis. The male genitalia of the new species are very similar in lateral aspect to those of L. agaue Malicky and Chantaramongkol 1996 and L. ganymedes Malicky and Chantaramongkol 2002 (in Malicky et al. 2002) found in Thailand, but can be distinguished from them by the characters of segment X. In L. agaue and L. ganymedes , the long slender processes of segment X are asymmetrical, but nearly symmetrical in the new species. The phallus of L. suwannarati n. sp. is cylindrical, but oval in L. agaue and stout and tubular in L. ganymedes .

Figures

FIGURES 17–21. Male genitalia of Leptocerus suwannarati n. sp. 17, left lateral; 18, dorsal; 19, ventral; 20, phallus, left lateral; 21, phallus, ventral. Inf = inferior appendage (paired), IX = segment IX, X = tergum X.