Limnocentropus kritsaneepaibooni, Laudee, Pongsak & Malicky, Hans, 2016

Laudee, Pongsak & Malicky, Hans, 2016, Limnocentropus kritsaneepaibooni new species (Limnocentropodidae: Trichoptera) from Shan State, Myanmar, with faunistic data for the family, Zootaxa 4137 (3), pp. 439-444 : 440-441

Limnocentropus kritsaneepaibooni n. sp.

( Figs. 1–4 )

Type material. Holotype male (PSUNHM). Myanmar: Shan State, Keng Tung Province, Water Electric Power Station, Jo Stream, 21°28’18”N, 99°34’40”E, 1149 m a.s.l., 28 Feb 2015, leg. Pongsak Laudee.

Paratypes: Myanmar: Same data as holotype, 1 male ( CHM). Myanmar: Shan State, Keng Tung Province, Sip Sam Lak, Kheun River, 21°27’23”N, 99°36’56”E, 764 m a.s.l., 27 Feb 2015, leg. Pongsak Laudee, 1 male (PSUNHM).

Etymology. Named for Asst. Prof. Dr. Saeng Kritsaneepaiboon, Entomologist who worked at the Faculty of Natural Resources, Prince of Songkla University, Hat Yai Campus.

Description. Length of each male forewing 13 mm (n=3); antennal length 8 mm; specimens in alcohol with head, thorax, abdomen yellowish brown; wings light gray.

Male genitalia ( Figs. 1–4 ). In lateral view ( Fig. 1 ), segment IX C-shaped with strong lateral protuberance on each side anteromesally and deep lateral excavation on each side posteromesally. Preanal appendages not evident. Segment IX fused with segment X. Segment X divided into 2 parts, upper part and lower part: Upper part long, isosceles triangle with ventral margin sinuous, posterior apex acute and directed dorsocaudad; lower part long, isosceles triangle beneath and between arms of upper part. Inferior appendages single-segmented, shorter than tergum X, each forming isosceles triangle, with basal part stout, massive, distal part tapered to blunt apex, with short hair except mesodorsal tuft of long hair. In dorsal view ( Fig. 2 ), upper part of segment X blade-like, sinuous laterally, divided 1/2 of its length apicomesally, with pointed apices; lower part of segment X also divided apicomesally, slightly longer than upper part, with pointed apices. In ventral view ( Fig 3 ), segment IX anterior margin with U-shaped incision nearly 1/2 as deep as length of segment, segment with transverse band of subapicomesal setae, posteromesal margin with acute tip. Inferior appendages each axe-like, basal half rectangular with tuft of setae subapicomesally, apical half cylindrical with beak-like apex. Phallus ( Fig. 4 ) cylindrical, slightly curved downward, with dark apicodorsal hook.

Diagnosis. The male genitalia of L. kritsaneepaibooni n. sp. appear very similar to those of L. inthanonensis Malicky & Chantaramongkol 1989 and L. auratus Malicky & Chantaramongkol 1989 , which are found in Doi Inthanon National Park, and Fang District, Chiang Mai Province, northern Thailand, respectively. These three species have similar lateral shapes of male genitalia and dorsal views of segment X. However, they can be distinguished by (1) the length of a forewing which is 13 mm in L. kritsaneepaibooni n. sp. but 15–16 mm in L. auratus and L. inthanonensis , (2) the upper part of segment X of L. kritsaneepaibooni n. sp. in dorsal view is blade-like, but triangular in both of L. auratus and in L. inthanonensis , (3) segment X of L. kritsaneepaibooni n. sp. is divided into 2 parts, upper and lower parts but not divided in L. auratus or L. inthanonensis , and (4) inferior appendages of L. kritsaneepaibooni n. sp. and L. auratus are triangular in lateral view, but those of L. inthanonensis are rectangular basally and tubular distally.

Figures

FIGURES 1 – 4. Male genitalia of Limnocentropus kritsaneepaipooni n. sp. 1, genitalia, left lateral: segment IX (IX), segment X (X), upper part of segment X (Up X), lower part of segment X (Lo X), inferior appendages (Inf); 2, segments IX and upper part of Segment X (Up X), lower part of segment X (Lo X), dorsal; 3, segment IX and inferior appendages (Inf), ventral; 4, phallus, left lateral.