Rhyacophila vajoni, Kiss, 2011

Kiss, O., 2011, Two New Species Of Rhyacophila (Trichoptera, Rhyacophilidae) From Nepal, Acta Zoologica Academiae Scientiarum Hungaricae 57 (2), pp. 111-116 : 114-116

Rhyacophila vajoni sp. n.

( Figs 10–12, 15–16)

Body length of male 9 mm, forewing length 11 mm, forewing width 4 mm, length of antenna 18 mm. Body, antennae, palpi and wings as well as legs and abdomen brown, genitalia yellowish brown ( Figs 15–16).

Male genitalia ( Figs 10–12, 16): Apicodorsal lobe of segment 9 relatively short with broad base and conical distal part in dorsal view ( Fig. 11). Praeanal appendages subtriangular in lateral view ( Fig. 10). Aedeagus tubular, basal part broad, middle portion undulated, distal part thin with apex pointing upwards in lateral view ( Figs 10, 16). Paramere shorter than aedeagus, basal part protruding ventrally, then attentuating, middle part bulging dorsally, distal part slender and slightly curved upwards with tapering apex in lateral view ( Figs 10, 16). Ventral lobe of aedeagus short with tips curved outwards ( Fig. 12). First joint of inferior appendages relatively short, broad at base, dorsal and ventral edges slightly curved, distal edge broad in lateral view ( Figs 10, 16). Posterior edge of second joint of inferior appendages deeply excised forming small dorsal auricle with curved tip and big concave tapering ventral part in lateral view ( Figs 10, 16).

Female. Unknown.

Material – Holotype: male, 2 km N of Tarebhir ( 27°23’N, 86°04’E, 2600 m), Mt. Kalinchok , Central Nepal, by light trapping, 02.07.1997, leg. MÁRTON HREBLAY and KRISZTINA CSÁK . Holotype is deposited in Mátra Museum , Gyöngyös, Hungary .

Paratypes: 1male, 2 km N of Tarebhir (27°63’N, 86°09’E, 2600 m), Mt. Kalinchok , Central Nepal, by light trapping, 02.07.1997, leg. MÁRTON HREBLAY and KRISZTINA CSÁK (coll. OTTÓ KISS) . 1male, 5 km W of Bigu, 2300 m, Mt. Kalinchok , Central Nepal, by light trapping, 03.07.1997, leg. MÁRTON HREBLAY and KRISZTINA CSÁK (coll. OTTÓ KISS) .

Differential diagnosis: This species is similar to Rhyacophila lepcha SCHMID 1970 ( Figs 13–14) but differs from it in that:

– apicodorsal lobe of segment 9 not short;

– aedeagus not evenly broad in 2/3 length from base, distal 1/3 thinner;

– paramere not uniform in width;

– first joint of inferior appendages shorter;

14

radix of anal sclerite; s.j. = second joint of inferior appendages, v.l. = ventral lobe of aedeagus)

– dorsal tip of second joint of inferior appendages not blunt, concave ventral portion not stout.

Derivatio nominis: This species is cordially dedicated to Prof. Dr. IMRE VAJON, who was my professor and encouraged me in my professional career.

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Acknowledgements – The author is grateful to † Dr. MÁRTON HREBLAY and KRISZTINA CSÁK for the light trap material.