Orthotrichia latiramifera Zhou et Ya

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 : 32-34

publication ID

https://doi.org/ 10.5281/zenodo.197113

DOI

https://doi.org/10.5281/zenodo.6199227

persistent identifier

https://treatment.plazi.org/id/03C67477-443B-1747-FF09-1D3686392D17

treatment provided by

Plazi

scientific name

Orthotrichia latiramifera Zhou et Ya
status

 

Orthotrichia latiramifera Zhou et Ya n g, sp. nov.

Figs 12–16 View FIGURES 12 – 16

Material. Holotype ɗ, Jiangxi Province, Jiu Lian Shan National Nature Reserve, Unnamed trib. of Xia-Gong- Tang Stream (114°28'08"E, 24°32'05"N), elev. 630 m, 2005-vi-07, Coll. Zhou Xin, Sun Chang-Hai.

Etymology. The compounded Latin words “ latus- ” (side), “ ramus ” (branch), and feminine suffix “-fera" (bearing) mean "side-branch-bearing", in reference to the spine arising subapically from the right lateral margin of segment X.

Description. Male. Distal ends of antennae lost, only 29 segments remaining. Anterior wing length 3.5 mm. Ventral process of segment VI short spine in lateral view (as in Fig. 22 View FIGURES 17 – 22 ). Ventral process of segment VII absent.

Male genitalia ( Figs 12–16 View FIGURES 12 – 16 ). Anterior margin of segment IX entire, straight in dorsal view ( Fig. 14 View FIGURES 12 – 16 ), but deeply excised in “U” shape in right pleural region ( Fig. 13 View FIGURES 12 – 16 ) and shallowly excised lateroventrally in left pleural region ( Fig. 12 View FIGURES 12 – 16 ), such that venter of IX forming asymmetrical triangular plate ( Fig. 15 View FIGURES 12 – 16 ); right posterolateral process of IX (p.l. sp.) forming huge spine ( Fig. 13 View FIGURES 12 – 16 ), longer and stouter than left process with distal half gradually narrowed to acute apex and turned caudodorsad, left process turned caudoventrad ( Fig. 12 View FIGURES 12 – 16 ). Tergite X fused with segment IX, about 1/3rd as broad as IX in dorsal view ( Fig. 14 View FIGURES 12 – 16 ), distal margin of X serrated and with its right apical end produced in lateral spine; dorsal spine (d. s.) long, slender, protruded laterally from right margin, about 1/3rd distance from apex in dorsal view ( Fig. 14 View FIGURES 12 – 16 ). Inferior appendages (inf. app.) short and stout, symmetrical; in ventral view ( Fig. 15 View FIGURES 12 – 16 ), triangular, broad basally, each with blunt apex bearing 1 seta, its anterolateral margin much longer than its inner margin and about 2/3rds as long as its basal width, at basomesal corners each with small, vertical, beak-like projection, with its apex curved mesad. Bilobed process (bil. pr.) stout, finger-like, shorter than inferior appendages, curved downward in lateral view ( Figs 17, 18 View FIGURES 17 – 22 ), in ventral view ( Fig. 15 View FIGURES 12 – 16 ) broadly V-shaped, with left lobe longer than right one, each lobe with 1 seta apically. Paramere spine (pa.) long, almost as long as genitalia. Phallus ( Fig. 16 View FIGURES 12 – 16 ) slender, basal portion about 3 times as long as distal portion, distal portion slightly protruded in small triangular “wings” at 1/4rth distance from its base, its apex enlarged and slightly bilobed, titillator encircling phallus 1 time.

Diagnosis. This species belongs to the Or. costalis Group. It is somewhat similar to Or. tombak Wells & Malicky, 1997 , from Indonesia, and Or. sibuyan Malicky & Chantaramongkol, 2007 , from the Philippines, in the general shapes of segment IX, tergum X, and the inferior appendages, but differs in that 1) tergum X has a long, slender branch protruding laterally from its right margin, (without such a branch in Or. tombak and Or. sibuyan ); 2) the right posterolateral process of segment IX is longer and stouter than the left one (with the left posterolateral process absent in Or. sibuyan ); and 3) the inferior appendages each have a small, vertical, beaklike projection at its basomesal corner (without such projections in Or. tombak ).

Distribution. Type locality only.

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