Rhyacophila farkasi Kiss 2013, sp. n.
Creators: name: Kiss, O.
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Trichoptera
Rhyacophilidae
Rhyacophila
Rhyacophila farkasi

description: Rhyacophila farkasi sp. n.
(Figs 1–4, 7–9)
Male: Body length 9.0 mm, forewing length 12.0 mm, forewing width 3.8 mm, forewing and hindwing with sporadically arranged circular pale spots, length of each antenna 17.0 mm. Body, antennae, palpi, and wings yellowish brown, abdomen brown with black spots, legs and genitalia yellowish brown (Figs 8–9).
Male genitalia (Figs 1–4): Apicodorsal lobe of segment IX (a.l.IX, Figs 1–2, 9) longer than phallicata, with slender proximal half, stout distal half and obtuse apex in lateral view, furcate and V-shaped in dorsal view (Figs 1–2). Segment X (X., Fig. 1) triangular with ventral spine in lateral view. Anal sclerites (a.s., Fig. 1) form bulges in lateral view, apical band (a.b., Fig. 1) U-shaped and narrow in lateral view. Endotheca (end., Figs 1, 3–4) with funnel-like proximal end in lateral and ventral views, phallicata (ph., Figs 1, 3–4) long tube, tapering distally in lateral and ventral views. Dorsal appendage (d.app., Fig. 1) of phallic apparatus concave with nearly parallel margins in lateral view. Lateral lobes of apical band (l.l.a.b., Figs 1, 3–4) furcate and bent upward distally with short spike in lateral and ventral views. Parameres (par., Figs 1, 3–4) elongate tapering spikes curved distally, half as long as phallicata or lateral lobe of apical band in lateral and ventral views. First segment of each inferior appendage (f.s., Fig. 1) short (or moderate in length), uniformly broad, shorter than apicodorsal lobe of segment IX (a.l.IX., Fig. 1), second joint (s.j., Fig. 1) of paired inferior appendages directed ventrocaudad with smooth ventral margin, minute spines on dorsal margin, and with obtuse apex.
Female: Body length 10.0 mm, forewing length 12.0 mm, wings scattered with circular pale spots, length of each antenna 17.0 mm. Body, antennae, palpi, legs, and wings yellowish brown, abdomen brown with black spots.
Female genitalia (Fig. 7): Simple, of medium length. Segments VIII and IX with setose tergum and sternum. Segment IX roughly trapezoidal in lateral view. Segment XI with dorsal apodemes extending anteriorly into segment VII. Segment X with basal apodemes also extending anteriorly into segment VII. Basal apodemes with short subapicodorsal point. Segment XI with pair of terminal papillae and pair of cerci.
Material – Holotype: male, Northern Thailand, Doi Inthanon National Park, 18°35’N 98°28’E, 2300 m elevation, by light trapping, 03–04 August, 1999, leg. Tibor Csővári and László Mikus (gen. prep. No. 115, Ottó Kiss, coll. Mátra Museum, Gyöngyös, Hungary).
Paratype: 1 female, Northern Thailand, Doi Inthanon National Park, 18 ° 35’N 98 ° 28’E, 2300 m elevation, by light trapping, 03–04 August, 1999, leg. Tibor Csővári and László Mikus (gen. prep. No. 116, Ottó Kiss, coll. Mátra Museum, Gyöngyös, Hungary).
Diagnosis: This new species resembles Rhyacophila trashipa Schmid, 1970 (1970, p. 132, pl. XLIII, figs 3–4; herein Figs 5–6) and Rhyacophila voccia Malicky et Chantaramongkol, 1993 (2010, p. 4), in the R. bifida group that comprises 7 species (approximately 0.9% of the size of Rhyacophilidae) recorded from Asia by Schmid (5 species 1970), Ross (one species, 1956), and MalicKy and ChantaramongKol (one species, 1993).
The outstanding similarities among the species in this group are the form of apicodorsal lobes of segment IX and that of the second joint of inferior appendages.
The most useful characters to recognize the new species are: second joint of paired inferior appendages, apicodorsal lobe of segment IX, lateral lobe of apical band, parameres and anal sclerites.
The characters that indicate the close relationship of R. farkasi sp. n. to R. trashipa are:
− phallicata of similar shape;
− first segments of paired inferior appendages of same length;
− tergal band of resembling form.
The distinguishing characters of R. farkasi sp. n. in comparison to R. trashipa are:
− apicodorsal lobe of segment IX longer than phallicata (not as long as phallicata),
− proximal half slender (not broad);
− segment X triangular with ventral spine (not lateral spine);
− lateral lobe of apical band bent upward, distal end furcate with spike (not single ended, bent downward and without spike);
− parameres half of the length of phallicata and curved upward (not as long as phallicata and not undulating);
− anal sclerite forms tiny bulge (not nearly ellipse).
The characters that indicate the relationship of the new species to R. voccia MalicKy et ChantaramongKol, 1993 are:
− second joint of paired inferior appendages of similar form;
− phallicata of resembling shape.
The distinguishing characters of the new species in comparison to R. voccia MalicKy et ChantaramongKol, 1993 are:
− apicodorsal lobe of segment IX longer than phallicata (not much shorter than phallicata);
− parameres long and curved, directed caudad (not short, with pointed apex and not directed caudoventrad).
description: Published as part of Kiss, O., 2013, Three New Species Of Rhyacophila (Trichoptera, Rhyacophilidae) From Asia, pp. 13-29 in Acta Zoologica Academiae Scientiarum Hungaricae 59 (1) on pages 15-19, DOI: 10.5281/zenodo.5732090