Ceraclea (A.) thongnooi Laudee & Seetapan, 2017

Laudee, Pongsak, Seetapan, Kriengkrai & Malicky, Hans, 2017, Three new species of Ceraclea Stephens 1829 (Trichoptera: Leptoceridae) from Southeast Asia, Zootaxa 4362 (2) : -

Ceraclea (A.) thongnooi Laudee & Seetapan , n. sp.

Figs. 5–8 .

Type material. Holotype male ( PSUNHM). Thailand: Prachuap Khiri Khan Province, Kuiburi River , 12o04’52”N 99o37’43” E, ca. 150 m a.s.l., 15 February 2015, leg. Pongsak Laudee.

Paratypes: Myanmar, Tanintharyi Division, Myeik, Tanintharyi, Ngawun Chaung River , 12o03’49”N 99o00’57” E, 18/11/2016, 15 a.s.l. m. leg. Pongsak Laudee, 16 males: 4 males ( PSUNHM ), 4 males ( CHM ), 4 males ( CPL ), and 4 males ( CUAC, database number CUAC 000044767) .

Etymology. Dedicated to Assoc. Prof. Dr. Krerkchai Thongnoo who was Vice President of Prince of Songkla University, Hat Yai Campus, during 2013–2015.

Description. Length of each male forewing 7–8 mm (n = 12), specimens in alcohol with head and thorax dark brown, mesoscutum dark brown in middle and light brown laterally, forewings light gray, abdomen light brown with dark brown terga.

Male genitalia ( Figures 5–8 ). In lateral view ( Fig. 5 ), segment IX forming triangle, straight ventrally and with acuminate process dorsally; preanal appendages subtriangular, 3/4 as long as segment X, each bulbous basally, with ventral margin very slightly concave, tapered and directed caudad apically; segment X sigmoid, broad basally, with posterior ventral margin concave, apex directed caudad and curved downward, longer than ventral margin of segment IX. Inferior appendages each shaped like head of seahorse with numerous short setae basomesally, long setae basoventrally; harpago needle-like. In dorsal view ( Fig. 6 ), dorsomesal process of segment IX triangular with small V-shaped apical incision, preanal appendages fused basally, rounded basolaterally, concave subapicolaterally, directed caudad, and separated by deep U-shaped incision for nearly 2/3 of their length; segment X parallel-sided, slender, slightly longer than preanal appendages, with short setae mesolaterally. In ventral view ( Fig. 7 ), segment IX quadrilateral, each side projecting caudad; inferior appendages shaped like head of seahorse, with numerous mesobasal and basoventral setae. Phallus elongate-oval, convex dorsally and concave ventrally, with 2 dark spearlike paramere spines ( Fig. 8 .).

Diagnosis. The new species belongs to subgenus Athripsodina Kimmins 1 963. The male genitalia of the new species are similar to those of several other species found in Southeast Asia including C. hersilia Malicky & Changthong 2002 (in Malicky et al. 2002) from Laos and Thailand; C. hesione Malicky 2002 (in Malicky et al. 2002) from Sumatra; C. hebe ; and C. hektor . The genitalia of all of these species including the new species are similar in lateral view. Ceraclea thongnooi n. sp. is distinguished from these species by its segment X longer than its inferior appendages, unlike to C. hersilia , C. hesione , C. hebe , and C. hector that have segment X shorter than or as long as their inferior appendages, in lateral view. The lateral view of the inferior appendages of C. hersilia , C. hesione , C. hebe , and C. hector are tubular and very different from those of the new species in which the inferior appendages are each shaped like a seahorse head.

Figures

FIGURES 5–8. Male genitalia of Ceraclea (A.) thongnooi n. sp. 5, genitalia, left lateral; 6, segments IX, X, and preanal appendages, dorsal; 7, segment IX and inferior appendages, ventral; 8, phallus, left lateral.