Setodes siribumrungsukhai, Laudee, Pongsak & Malicky, Hans, 2016

Laudee, Pongsak & Malicky, Hans, 2016, Three new species of Leptoceridae Leach 1815 (Insecta: Trichoptera) from Shan State, Myanmar, Zootaxa 4097 (2), pp. 263-270 : 266

Setodes siribumrungsukhai n. sp.

( Figs. 5–8 )

Type material. Holotype male (PSUNHM). Myanmar: Shan State, Keng Tung Province, Naw-awn, Salween River, 21°13’46”N, 098°42’32”E, ca. 251 m a.s.l., 0 4 May 2015, leg. Sai Aye.

Paratypes: Same data as holotype, 2 males (PSUNHM); Myanmar: Shan State, Keng Tung Province, Nam Lok Stream, 21°22’50”N, 099°00’49”E, 442 m a.s.l., 0 3 May 2015, leg. Sai Aye, 2 males ( CHM).

Etymology. Named for Assoc. Prof. Dr. Boonsom Siribumrungsukha who was President of Prince of Songkla University in 2006–2012.

Description. Length of each male forewing 6 mm (n=5); antennal length 11 mm; specimens in alcohol with head, thorax, abdomen, and forewings light yellowish brown.

Male genitalia ( Figures 5–8 ). In lateral view ( Fig. 5 ), segment IX trapezoidal; preanal appendages apparently absent (fused with base of segment X); segment X deeply divided apically into 2 saber-like blades, very long, gradually curved downward, with tuft of long subbasal setae dorsolaterally; inferior appendages each bilobed: dorsal lobe tubular with long setae, curved downward and ventral lobe scale-like, subapically with numerous long setae. In dorsal view ( Fig. 6 ), segment X long, isosceles triangle, basal 1/4 fused, with many short and long setae subbasally, distal blades subparallel and convergent apically. In ventral view ( Fig. 7 ), inferior appendages rectangular, fused in basal half, each with round knob basolaterally and broad and shallow incision apically, with numerous long setae subapically. Phallus long, curved downward, pointed apically; basal part larger than apical one and separated by a step, tapered and curved downward and pointed apically ( Figure 8 ).

Diagnosis. This species belongs to the Setodes hungaricus Group of Schmid (1987). The male genitalia of Setodes siribumrungsukhai n. sp. appear very similar to those of S. spinosellus Ulmer 1930 , found in the Philippines. However, the pictures by Ulmer are not very detailed. These species can be distinguished by the shapes of the inferior appendages. The inferior appendages of the new species was are each divided into 2 obvious lobes, with the dorsal lobe cylindrical and curved downward. In contrast, S. spinosellus has undivided inferior appendages, with the dorsal part of each inferior appendage forming a short spine dorsoapically. The ventral lobe of each inferior appendage of the new species is round apically, but this region is truncated in S. spinosellus . The shape of the phallicata of S. spinosellus is falciform and the parameres are paired, long, and spine-like. However, the phallicata in S. siribumrungkhai n. sp. is not so shaped and no parameres are shown.

Figures

FIGURES 5 – 8. Male genitalia of Setodes siribumrungsukhai n. sp. 5, genitalia, left lateral: segment IX (Seg IX), segment X (Seg X), inferior appendages (Inf); 6, segments IX and X and phallus (Pha), dorsal; 7, segment IX and inferior appendages, ventral; 8, phallus, left lateral.