Rhyacophila szaboi, Kiss, 2013

Kiss, O., 2013, Three New Species Of Rhyacophila (Trichoptera, Rhyacophilidae) From Asia, Acta Zoologica Academiae Scientiarum Hungaricae 59 (1), pp. 13-29 : 23-26

publication ID	https://doi.org/ 10.5281/zenodo.5732090
DOI	https://doi.org/10.5281/zenodo.6909239
persistent identifier	https://treatment.plazi.org/id/5730879F-FFB6-D908-5515-D987FC68FAA0
treatment provided by	Felipe
scientific name	Rhyacophila szaboi
status	sp. nov.

Treatment

Rhyacophila szaboi sp. n.

( Figs 21–24 View Fig View Figs 22–24 , 28–29 View Figs 28–29 )

Male: Body length 7.0 mm, forewing length 8.5 mm, forewing width 3.5 mm, length of the antennae 6 mm. Body, antennae, palpi, and wings yellowish brown, abdomen black, genitalia and legs yellowish brown ( Figs 28–29 View Figs 28–29 ).

Male genitalia ( Figs 21–24 View Fig View Figs 22–24 , 28–29 View Figs 28–29 ): Segment X (X, Figs 21 View Fig , 23–24 View Figs 22–24 ) dorsally V-shaped, ending laterally in obtuse apex. Apical band (a.b., Figs 21 View Fig , 24 View Figs 22–24 ) hemispheric, anal sclerites (a.s., Figs 21 View Fig , 24 View Figs 22–24 ) form small paired warts. Phallicata (ph., Figs 21–22 View Fig View Figs 22–24 ) tubular, proximally thick, distally slender. Proximal part of paramere (par., Figs 21–22 View Fig View Figs 22–24 ) in sheath, distal part straight with long setae on dorsal margin and short setae on ventral margin. Ventral lobe (v.l., Figs 21–22 View Fig View Figs 22–24 ) narrow, ribbon-like, longer than phallicata, ending in acute, upward apex. First segment of each inferior appendage (f.s., Fig. 21 View Fig ) moderately long, with concave ventral margin. Dorsal lobe of the second joint of each inferior appendage (s.j., Figs 21 View Fig , 29 View Figs 28–29 ) distally round, ventral lobe small, with shallow indentation between lobes.

Female. Unknown.

Material – Holotype: male, Mt. Kalinchok 5 km W of Bigu, 27°62’N 86°03’E, 2000 m, by light trapping, 03 July, 1997, leg. Márton Hreblay & Krisztina Csák (gen. prep. No. 118, Ottó Kiss, is deposited in Mátra Museum, Gyöngyös, Hungary).

Paratype: 1 male, Mt. Kalinchok 5 km W of Bigu, 27°62’N 86°03’E, 2000 m, by light trapping, 03 July, 1997. leg. Márton Hreblay & Krisztina Csák (coll. Ottó Kiss) .

Diagnosis: This species is similar to Rhyacophila obscura Martynov, 1927 (drawings by Schmid, 1970, p. 123, pl. XXIII, figs 1–4; herein Figs 25–27 View Figs 25–27 ) in the R. obscura g roup by Schmid, which comprises 6 species (approximately 0.7% of the size of Rhyacophilidae ) recorded from Asia by Schmid (5 species, 1970) and Sun and Yang (one species, 1995).

The characters that place the new species in the R. obscura group are segment X, second joint of paired inferior appendages, parameres, apical band, phallicata, and tergal band.

The most useful characters to recognize the new species are:

− second joint of paired inferior appendages,

− segment X,

− anal sclerites,

− phallicata,

− paramere,

− and ventral lobe.

The characters that indicate the relationship of R. szaboi sp. n. to R. obscura are:

− ventral lobe,

− tergal band,

− first segment of paired inferior appendages,

− paired tenons of the phallotheca.

The distinguishing characters of R. szaboi sp. n. in comparison to R. obscura are:

− the V-shaped segment X without protuberence in the middle, with obtuse (not acute) apex;

− anal sclerites form warts (that are not vertically elongate);

− apical band hemispheric (not column-like);

− distal part of phallicata slender (not thick and without expansion);

− distal part of paramere broad and ribbon-like (not heart-shaped), having thick row of long setae (not short ones) on dorsal margin;

− ventral lobe extremely narrow (not broad) and ribbon-like, ending in acute (not broad and obtuse) apex;

− distal indentation between upper and lower lobes of the second joint of the inferior appendages shallow (not deep), lower lobe short (not strongly elongate).

Derivatio nominis: This species is dedicated to the late Prof. Jenő Szabó, who was my professor and initiated me into the study of Trichoptera .