Rhyacophila alaplica, Sipahiler, Füsun, 2013

Sipahiler, Füsun, 2013, Revision of the Rhyacophila stigmatica Species Group in Turkey with descriptions of three new species (Trichoptera, Rhyacophilidae), Zootaxa 3669 (1), pp. 43-55 : 46-47

Rhyacophila alaplica sp. n.

( Figures 1–10 )

Material. Holotype male: Turkey, Zonguldak, Alapli, Bacaklı Yaylası direction, 1170 m, 41°02'N / 31°40'E, 21.viii.2011, leg. Sipahiler, coll. MNB (CD: A-939).

Paratypes (all leg. and coll. Sipahiler): Same collection data, 1 male, 1 female (CD: A-939); same collection data except 24.vii.2011, 1 male, (CD: A-930); same collection data except 24.vii.2011, 2 males (CD: A-934); same collection data except 1085 m, 12.vii.2011, 1 male (CD: 937); same collection data except 20.ix. 2011, 1116 m, 3 males, 1 female (CD: A-946).

General description. Antennae, legs and wings in alcohol dark brown; length of each anterior wing of male 7.5– 8 mm (n=6), that of female 8 mm (n=2).

Male genitalia ( Figs. 1–5 ): Apicodorsal lobe of segment IX (s.IX) reduced to very small triangular projection, in lateral view; sclerotized bands (sb) articulating on segment X long, in dorsal and lateral views, apices rounded ( Figs. 1, 2 ); in lateral view segment X (s.X) directed dorsad ( Fig. 1 ), with large and rounded setose lobe on ventral portion of concave caudal surface below rounded hairy area ( Fig. 3 ). Plate-like anal sclerite (a.s) visible in caudal view below tergum X ( Fig. 3 ). Basomesal surface of coxopodite (cox) of each inferior appendage with almost round sclerotized basal tendon (b.t.c), with apical edge strongly sclerotized and possessing small pointed projection on ventral corner; harpago (har) gradually narrowed toward tip ( Fig. 1 ). In lateral view, long and slender pair of tenons arising laterally on phallotheca and articulating distally with basal tendons of coxopodites ( Fig. 1 ). Phallic apparatus with dorsal processes of phallotheca (d.p.p); dorsal process of base of Ross 1956, dorsal appendage of phallic apparatus of Schmid 1970) long, each with basal portion round and dilated dorsally, apical part narrow and round at tip ( Fig. 4 ); apicodorsal portion of phallicata strongly sclerotized ( Figs. 4–5 ), in dorsal view dorsal processes mostly parallel-sided and then tapering and slightly outcurved distally, apicodorsal sclerite of phallicata broad, semicircular with U-shaped posterior excision and pointed apicolateral tips, ventral lobe of phallicata projecting beyond U-shaped excision with two tiny apical points ( Figs. 4–5 ); tip of single paramere (par) broad, apically convex, bearing crown of 28 long and thickened and plumose spines ( Fig. 4 ).

Female genitalia ( Figs. 6–10 ): In lateral view, sclerotized part of segment VIII (s.VIII) elongate, about 1.3 times as long ventrally as tall anteriorly ( Fig. 6 ), forming long and oval mesal posteroventral lobe ( Fig. 8 , m.l); posterolateral edge somewhat sinuate, dorsolateral edges short ( Fig. 6 ); in dorsal view, dorsomedian portion of segment VIII not sclerotized ( Fig. 7 ). Anterior process of bursa copulatrix (a.p.b.c) S-shaped in lateral view, semicircular in ventral view; posterior process of bursa copulatrix (p.p.b.c) with posterior half twice as thick as anterior half ( Fig. 10 ).

Remarks. Rhyacophila alaplica sp. n. closely resembles R. zwickorum Malicky 1972 , described from Rize Province in northeastern Anatolia (Malicky 1972), but differs from this species in terms of the following features: In R. zwickorum segment IX has a dorsal lobe and the concave apical portion of segment X is without a rounded mesal lobe; in R. alaplica sp. n. there is no dorsal lobe on segment IX, only a small projection, and the concave apical portion of segment X has a large and rounded mesal lobe. In R. zwickorum the basal tendon of the coxopodite of each inferior appendage has a hook-shaped projection on the apicoventral edge whereas in R. alaplica sp. n. the basal tendon of each coxopodite is almost rounded and the apicoventral projection is very small. In R. zwickorum the dorsolateralal processes of the phallotheca are long and pointed at the tip, the bases of which are triangular, and between the basal process and the apical portion of the phallicata is a sclerotized area covered by small sclerotized tubercles; in R. alaplica the dorsolateral processes of the phallotheca are rounded at the base and there is no sclerotized area with sclerotized tubercles located on the median part of the phallicata. In addition, the female of the new species differs from the related species by segment VIII having a long mesal posteroventral lobe and no dorsomesal sclerotization, while in R. zwickorum and the other species described below, the apicoventral edge is dilated and round and the dorsomesal part is sclerotized.

Etymology. This species is named after the place around where the specimens were collected.

Figures

FIGURES 1 – 5. Rhyacophila alaplica sp. n., male genitalia. 1, left lateral, with left inferior appendage absent, revealing mesal surface of right inferior appendage; 2, dorsal; 3, segment X, caudal; 4, phallic apparatus, left lateral; 5, phallic apparatus, dorsal. a. s = anal sclerite; b. t. c = basal tendon of a coxopodite; cox = coxopodite (first article of an inferior appendage, paired); d. p. p = dorsal process of phallotheca (paired); har = harpago (second article of an inferior appendage, paired); h. l = hairy lobe of segment X; par = paramere; phal = phallotheca; phalc = phallicata; sb = sclerotized band (paired); s. IX = abdominal segment IX; s. X = abdominal segment X.

FIGURES 6 – 10. Rhyacophila alaplica sp. n., female genitalia. 6, left lateral; 7, dorsal; 8, ventral; 9, bursa copulatrix, left lateral; 10, bursa copulatrix, ventral. a. p. b. c = anterior process of bursa copulatrix; m. l = mesal lobe of venter VIII; p. p. b. c = posterior process of bursa copulatrix; s. VIII = abdominal segment VIII.