Ceraclea satasookae, 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 : 265-266

Ceraclea satasookae n. sp.

( Figs. 1–4 )

Type material. Holotype male (PSUNHM). Myanmar: Shan State, Keng Tung Province, Moung Ping, Nam Lok Stream, 21°21’52”N, 099°00’51”E, ca. 443 m a.s.l., 0 3 May 2015, leg. Sai Aye.

Paratypes: Myanmar: Same data as holotype, 1 male (PSUNHM). Myanmar: Shan State, Keng Tung Province, Naw-awn, Nam Hlong Stream, 21°13’17”N, 098°44’52”E, 374 m a.s.l., 0 4 May 2015, leg. Sai Aye, 1 male ( CHM).

Etymology. Named for Assoc. Prof. Dr. Chutamas Satasook, who is the Director of the Princess Maha Chakri Sirindhorn Natural History Museum (PSUNHM).

Description. Length of each male forewing 9 mm (n=3); antennal length 1.6 mm (n=3); specimens in alcohol with head and thorax dark brown, mesoscutum dark brown in middle and light brown laterally, forewings brown, abdomen light brown with dark brown terga.

Male genitalia ( Figures 1–4 ). In lateral view ( Fig. 1 ), segment IX subrectangular; preanal appendages subtriangular, ventral margins broadly rounded, with long setae subapicoventrally. Segment X long, subquadrate in basal 1/3, cylindrical in apical 2/3, apex blunt, with row of short setae subdorsoapically and tufts of short setae basoventrally and subapicoventrally; inferior appendages complex, connected with each other on huge basal plate; each with subapicodorsal lobe shuttle-like with long setae; its harpago tubular, as long as subapicodorsal lobe; basal part of basal segment rectangular with long, curved, acute basoventral lobe. In dorsal view ( Fig. 2 ), segment IX rounded apically; preanal appendages semicircular, separated for most of their length by deep U; segment X oval with stout setae apical and laterally. In ventral view ( Fig. 3 ), basoventral lobe of each inferior appendage bowling-pin-like, knob with short setae on mesal surface of basal segment of each inferior appendage and claw with long setae subbasolaterally. Phallus with two phallic spines curved upward, membranous apically, sclerotized apicoventrally ( Fig. 4 ).

Diagnosis. The male genitalia of the new species are most similar to those of C. senilis ( Burmeister 1839) , which is common in European countries and Siberia. These two species have similar lateral character of genitalia and dorsal view of preanal appendages. However, they can be distinguished by (1) the length of the forewing which is 12–13 mm (n=5) in C. senilis and 9 mm in C. satasookae n. sp.; (2) the preanal appendages of C. senilis are fused about 1/4 their length and separated apically by a V-shaped incision, but those of C. satasookae n. sp. are fused only at the base and are much more widely separated by a U-shaped incision; (3) the harpago of each inferior appendage of C. senilis is 2/3 as long as its subapicodorsal lobe, but the harpago of the new species is subequal in length to its subapicodorsal lobe; and (4) the new species has a long pointed basoventral lobe of each inferior appendage, which is short and blunt in C. senilis .

Figures

FIGURES 1 – 4. Male genitalia of Ceraclea satasookae n. sp. 1, genitalia, left lateral: preanal appendages (Pre), segment X (Seg X), basal plate (Bas), inferior appendages (Inf), subapicodorsal lobe (Sua), harpago (Har), basoventral lobe (Bav); 2, segment IX, dorsal: preanal appendages, and segment X (Seg IX); 3, segment IX and inferior appendages, ventral; 4, phallus, left lateral.