Difference between revisions of "Triaenodes rebellus"
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Ordo: Trichoptera
Familia: Leptoceridae
Genus: Triaenodes
Name
Triaenodes rebellus Eriksson & Johanson sp. n. – Wikispecies link – ZooBank link – Pensoft Profile
Diagnosis
Triaenodes rebellus resembles the New Guinean species Triaenodes mondoanus Kimmins, 1962 by having the dorsal right posterior margin of segment IX strongly produced posteriorly into a needle-shaped process. The new species is easily separated from mondoanus by the upper part of tergum X being about as long as the cerci, not much longer than cerci as in Triaenodes mondoanus; and the basomesal process and dorsal branch of each coxopodite is present, while absent in mondoanus.
Description, male
Wings (Fig 1). Forewing 5.2 mm, hind wing 4.3 mm (N=1). Forewing: stem of M absent; forks I and V present; wing membrane with pale area along apical margin, mid-anterior margin, and basal two-thirds of posterior margin. Hyaline area present at anastomosis. Hind wing: uniformly gray without apparent patterns.
Genitalia (Figs 4–8). Segment IX wide, asymmetric; in lateral view with ventral part produced posteriorly, anterior margin slightly convex, ventral margin concave; in dorsal view almost rectangular, anterior margin with central part slightly produced anterad; in ventral view broad anterior half and slightly narrower posterior half separated by narrow incision, anterior margin of segment IX deeply concave, lateral margins slightly concave, posterior margin straight. Dorsal right posterior margin of segment IX strongly produced posterad, forming almost straight, needle-shaped process exceeding processes of tergum X (visible in dorsal view and right lateral view), bow-shaped, gently curved mesally. Cerci straight, thin, elongate; covered with long, robust, and short, weak setae. Tergum X with well-developed upper and lower part, upper part about as long as cerci; forming central, slender, elongate, slightly dorsoventrally flattened process, setose at apical one-third; in lateral view with basal half almost straight, curving ventrally from mid-length (Fig. 4); in dorsal view slender, hourglass-shaped, with irregular lateral margins at distal one-third. Lower part of tergum X bilobed from base, each lobe thin, strongly elongate, significantly longer than cerci, right lobe slightly shorter than left lobe and tuboid at apex, left lobe slightly club-shaped at apex; in lateral view each lobe curved ventrally; in dorsal view almost parallel. Coxopodites in lateral view, with basal half almost circular, each divided at mid-length into dorsal and ventral branch, posterior margin above dorsal branch undulating. Each dorsal branch about one-third as long as total length of each coxopodite, originating from mid-height of basal part, tube-shaped, with two long apical setae; weakly bent dorsally at mid-length in lateral view; diverging apically in ventral view. Ventral branch of each coxopodite abundantly setose, more densely posteriorly; in lateral view bent dorsad at mid-length, apical part thin; in ventral view widest at base, lateral margin undulating, mesal margin sigmoid, apically diverging. Each basomesal process slender, apically club-shaped with abundant thick spines; in lateral view curved ventrally, reaching as far out as apex of dorsal branch; in ventral view straight or weakly curving mesally. Phallic organ about as long as dorsal part of tergum X; strongly curved ventrally immediately before mid-length, phallobase subtriangular, phallotheca slender immediately after phallobase, uniformly widening apically; endotheca apparently trilobed, membranous, without spines.
Material examined
Holotype male: Fiji: Viti Levu Island, Naitasiri Province, Nakobalevu Mt., rainforest, 18°03'S, 178°25'E, 340 m, Malaise trap, 22.ix–9.x.2002, leg. M. Irwin, E. Schlinger & M. Tokoka’a. [FNIC, alcohol]
Etymology
Rebellus, from Latin rebellis, insurgent in English, referring to genitalia being armed by many pointed processes.
Original Description
- Johanson, K; Eriksson, M; Müller, H; Li, H; 2012: Description of three new Triaenodes species from Fiji (Trichoptera, Leptoceridae) ZooKeys, 244: 21-31. doi
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