Rhyacophila fasciata delici Kučinić & Valladolid, 2020

Valladolid, María, Kučinić, Mladen, Arauzo, Mercedes, Cerjanec, Darko, Ćuk, Renata, Dorda, Beatriz A., Lodovici, Omar, Stanić-Koštroman, Svjetlana, Vučković, Ivan & Rey, Isabel, 2020, The Rhyacophila fasciata Group in Croatia and Bosnia and Herzegovina: Rhyacophila f. fasciata Hagen 1859 and the description of two new subspecies, Rhyacophila fasciata delici Kučinić & Valladolid (ssp. nov.) from Croatia and Bosnia and Herzegovina and Rhyacophila fasciata viteceki Valladolid & Kučinić, Zootaxa 4885 (1), pp. 51-75 : 60

Rhyacophila fasciata delici Kučinić & Valladolid (ssp. nov.)

This subspecies has been found widely distributed in Croatia and it is also present in Bosnia and Herzegovina.

Etymology. The specific name is the genitive singular of Delić, given in honour of Dr. Antun Delić, naturalist and biologist, retired professor of the Teachers Faculty, University of Zagreb.

Type material. Holotype ♂: CROATIA, Roški slap (Roški waterfall), National Park “Krka” (43.90625º N 15.975º E, 80 m a.s.l.), 10/v/19 (M. Kučinić & A. Delić) [ R1 , no. 4444 ( TCK)].

Paratypes: 1 ♀, same locality as holotype, 19/v/19, (M. Kučinić & A. Delić) [ R2 , no. 4445 ( TCK)]. 2 ♂, spring of the river Čabranka, 21/vi/15 (D. Cerjanec) [C1–C2, nos. 4446–4447 ( MKC)] 2 ♂, same locality, 05/v/15 (D. Cerjanec) [C3, no. 4448 ( MKC), C4 , no. 1110 ( UMBH)]. 1 ♂, spring of river Bijela rijeka, National Park “Plitvice Lakes”, 16/iii/18 (I. Sivec, M. Kučinić & S. Žalac) [BI1, no. 4449 ( MKC)]. 1 ♂, Brkljača channel, Udovičić, 20/vi/15 (S. Žalac & M. Kučinić) [BR 1, no. 4450 ( MKC)] . 1 ♀, tributary of river Cetina, Civljani , 07/vi/15 (M. Kučinić & A. Delić) [CT1, no. 4451 ( MKC)]. 1 ♂ and 1 ♀, river Butišnica, Golubić , 06/viii/15 (A. Delić & A. Ćukušić) [BT1–BT2, nos. 4452–4453 ( MKC)] . 1 ♀, Brušane, Gospić, Ličko-Senjska county, Road 25, 10-15/vii/16 (G. Galli) [BU1, ID Data number of Access Catalog 33789 ( MCSN)]. 1 ♂ and 1 ♀, spring of the river Dretulja , 09/ix/14 (D. Cerjanec & M. Kučinić) [D1–D2, MNCN _ Ent 269370, MNCN _ Ent 269371 ( MNCN)]. 1 ♂ and 1 ♀, Vukovića spring, river Cetina, 09/v/17 (A. Delić & M. Kučinić) [ V1 – V2 , MNCN _ Ent 269372, MNCN _ Ent 269373, ( MNCN)]. 2 ♂, middle part of river Gacka , Otočac, 11/v/15 (D. Cerjanec & M. Kučinić) [G1–G2, MNCN _ Ent 269374, MNCN _ Ent 269375, ( MNCN)] .

Description of the imago. Holotype (R1): Length from front of head to distal edge of segment IX 8.82 mm, each forewing 11.42 mm, each hind wing 9.65 mm.

Males: Length 7.21–9.92 mm (x = 8.61, n = 12), each forewing 10.07–13.09 (x = 11.15, n = 12), each hind wing 8.29–11.17 mm (x = 9.66, n = 12).

Females: Length from front of head to distal edge of segment VIII 8.96–11.61 mm (x = 10.69, n = 6), each forewing 10.48–14.15 mm (x = 12.28, n = 6), each hind wing 9.77–12.7 mm (x = 10.93, n = 6).

In ethanol-preserved specimens colour generally pale brown and yellowish, with golden brown setae. Head, thorax, and abdomen dorsally pale brown, with small black and irregular darker brown spots in dorsal area, abdomen ventrally yellowish; females generally darker than males, anterior 2/3 of abdominal segments pale brown or brown in darker specimens. Legs light, with spurs reddish brown. Forewings brown, spotted lighter than background; hind wings pale.

Male genitalia ( Figs 1 , 5 a–5e): Apical segment of each inferior appendage ( Figs 1A , 5a ) with basal and distal edges diverging, posterior edge oblique straight or slightly convex, ventral edge slightly concave, at least two times longer that dorsal edge. Apicodorsal vertex slightly angular, apicoventral angle projecting as thick lobe narrowing progressively to round apex ( Fig 5a ).

Parameres ( Figs 1 BV–1BL, 5c, 5d) in ventral view curved posteromesad in apical half ( Figs 1 BV p, 5c). In lateral view ( Figs 1 BL, 5d) each slender at base, dilated in middle, with almost parallel dorsal and ventral margins in central area, pointed at apex; few thick spines on midventral margin and posterior midventral area, parallel to surface ( Figs 5c, 5d ); midlateral surface almost completely covered by thin spicules or setae, reaching from anteroventral edge to posterodorsal edge of paramere, decreasing in size from ventral to dorsal margin, absent on middorsal edge.

Aedeagus (phallicata) in lateral view ( Figs 1 CL, 5e) with anterodorsal margin straight, then slightly concave with posterior corner of concavity hooked anterad, upper posterior edge slightly concave, then straight caudad, ventral apex round, ventral edge curved upward anteriorly to slight angle below hook. Lateroventral lobes of phallus ( Fig 1 CD lvl) convex, narrowing progressively towards apex, apicolateral margins slightly pointed to inside, posterior edge of each lobe concave. Ventral lobe of aedeagus subtriangular, pointed progressively backwards ( Fig 1 BV vl).

Apicodorsal lobe of segment IX ( Figs 1 DD, 5b) dilated subapicolaterally, nearly circular, ratio of posterior maximum width to anterior width 2:1; preanal appendages ( Fig 1 DD pa) shorter than apicodorsal lobe ( Fig 1 DD al) of segment IX laterally, with concave posterior edges. In ventral view ( Fig 1 DV), apical band V-shaped, inner and outer edges almost parallel in posterior third, rounded apically, longer than wide ( Fig 1 DV ab); posterior edge of non-sclerotized ventral area round, with apicomesal incision ( Fig 1 DV va), anal sclerites triangular ( Fig 1 DV as).

Figures

FIGURES 1, 2. Male and female genitalia of Rhyacophila fasciata delici Kučinić & Valladolid ssp. nov. 1, male: 1A, 2nd segment of left inferior appendage, left lateral; 1BV–1BL, parameres: 1BV, parameres (p) and ventral lobe of aedeagus (phallicata) (vl), ventral; 1BL, left paramere, left lateral. 1CL–1CD, aedeagus (phallicata) and lateroventral lobes: 1CL, aedeagus and ventral lobe, lateral; 1CD, aedeagus and lateroventral lobes (lvl), dorsal. 1DD, apicodorsal lobe of segment IX (al) and preanal appendages (pa); 1DV, segment X, ventral, ab = apical band, as = anal sclerites, va = non-sclerotized ventral area. 2, female segments VIII–XI: 2L, left lateral; 2D, dorsal; 2V, ventral. Scale bars: unlabelled = 1 mm; circle = 0.5 mm; asterisk = 250 µm.

FIGURES 5–7. Male genitalia of Rhyacophila spp. 5, R. fasciata delici Kučinić & Valladolid ssp. nov. 6, R. fasciata viteceki Valladolid & Kučinić ssp. nov. 7, R. f. fasciata Hagen, 1859. 5a–7a, 2nd segment of left inferior appendage, left lateral; 5b–7b, apicodorsal lobe and preanal appendages, dorsal; 5c–7c, parameres and aedeagus (phallicata), ventral; 5d–7d, left paramere, left lateral; 5e–7e, aedeagus (phallicata) and ventral lobe, left lateral. Scale bars: a–c = 0.5 mm, d–e = 250 µm.