Orthotrichia cuspidigera Zhou & Yang

Lei, Zhou, Lian-Fang, Yang & Morse, John C., 2010, Six new species and 1 new species record of Orthotrichia (Trichoptera: Hydroptilidae) from China, Zootaxa 2560, pp. 29-41 : 38-40

Orthotrichia cuspidigera Zhou & Yang , sp. nov.

Figs 33–37

Material. Holotype ɗ, Jiangxi Province, Jiu Lian Shan National Nature Reserve, Da-Qiu-Tian, 8.2 KM northwest of Da-Qiu-Tian (114°25'50"E, 24°34'15"N), elev. 425 m, 2005-vi-10, Coll. Zhou Xin.

Etymology. The Latin word " cuspidigera " means "with acute apex", in reference to the acute apex of tergum X.

Description. Male. Distal ends of antennae broken, only 20 segments remaining. Anterior wing length 2.0 mm. Ventral process of segment VI short spine in lateral view (as in Fig. 22 ). Ventral process of segment VII absent.

Male genitalia ( Figs 33–37 ). Tergum IX very short, with its anterior margin sinuous, asymmetrically incised ( Fig. 35 ), pleural regions nearly triangular with anterior margins inclined 30º–40º ( Figs 33, 34 ), venter IX broadly oval ( Fig. 36 ); posterolateral processes (p.l. pr.) of segment IX located dorsally, asymmetrical, left process stout, gradually narrowed to downcurved apex ( Fig. 33 ), right one directed backward with apex slightly twist and tilted upward ( Fig. 34 ). Tergum X (X) fused with tergum IX, in dorsal view ( Fig. 35 ) positioned in right half of tergum IX, narrow triangular, with acute apex turned caudodorsad and toward left; dorsal spine of X arising on left basal corner, hook-like with apex directed caudoventrad and toward right. Inferior appendages (inf. app.) long and slender, asymmetrical, with fine, sparse setae on dorsal margins ( Figs 33, 34 ), in ventral view ( Fig. 36 ) each appendage broad at base and fused in semicircular plate, right appendage deeply divided into 2 branches, inner branch slender and shorter than outer one and with distal half narrowed to acute apex and curved mesad, length and shape of outer branch identical with left appendage apically, long cylindrical, each bearing apical seta; left appendage with rounded basomesal shoulder. Bilobed process (bil. pr.) short, digitate, hidden above bases of inferior appendages, each branch bearing distal seta. Pair of long, tube-like processes (t. pr.) further above bases of inferior appendages, arranged in U shape in ventral view. Paramere spine long, slightly shorter than genitalia. Phallus ( Fig. 37 ) slender, basal portion about 1.6 times as long as distal portion, with its apex slightly enlarged, titillator circling segment once.

Diagnosis. This species is not assignable to any group. It is somewhat similar to Or. tyro Malicky & Chantaramongkol, 2007 , from Thailand, in the general shape of segment IX and the inferior appendages composed of three branches, but it differs in that 1) the dorsal spine of tergum X is a strong hook with an acute apex (it is a short, stout process with a blunt, notched apex in Or. tyro ) and 2) the inner branch of the right inferior appendage is slender, about 3/4ths as long as the outer branch (it is only a short spine in Or. tyro ).

Distribution. Type locality only.

1. Orthotrichia tragetti Mosely, 1930 China (Henan, Hubei, Jiangsu); Palearctic 2. Orthotrichia wellsae Xue & Yang, 1990 China (Guangxi) Or. angustella Group

3. Orthotrichia bencana Oláh 1989 China (Guangxi, Guizhou, Jiangxi); Vietnam 4. Orthotrichia bucera Yang & Xue, 1992 China (Guangxi, Guizhou, Jiangxi, Yunnan) 5. Orthotrichia apophysis Zhou & Yang , sp. nov. China (Guangxi, Jiangxi) 6. Orthotrichia udawarama ( Schmid, 1958) China (Hainan, Yunnan); Sri Lanka Or. costalis Group

7. Orthotrichia cornuta Zhou & Yang , sp. nov. China (Sichuan) 8. Orthotrichia costalis (Curtis, 1834) China (Guangxi, Hainan, Henan, Hubei, Jiangsu, Jiangxi,

Shandong); Palearctic 9. Orthotrichia latiramifera Zhou & Yang , sp. nov. China (Jiangxi) 10. Orthotrichia terpsichore Malicky & China (Jiangxi); Thailand Chantaramongkol, 2007, n. rec.

Incertae sedis

11. Orthotrichia discedata Zhou & Morse , sp. nov. China (Fujian) 12. Orthotrichia cuspidigera Zhou & Yang , sp. nov. China (Jiangxi) 13. Orthotrichia obtecta Wells & Dudgeon, 1990 China ( Hong Kong) 14. Orthotrichia subrhomba Zhou & Morse , sp. nov. China (Fujian)

Figures

FIGURES 33 – 37. Orthotrichia cuspidigera, sp. nov., male genitalia. 33, left lateral view; 34, right lateral view; 35, dorsal view; 36, ventral view; 37, phallus. Abbreviations explained in text.

FIGURES 17 – 22. Orthotrichia terpsichore Malicky & Chantaramongkol, 1997, male genitalia. 17, left lateral view; 18, right lateral view; 19, dorsal view; 20, ventral view; 21, phallus; 22, left lateral view of ventral process of segment VI. Abbreviations explained in text.