Ecdyonurus (Ecdyonurus) eurycephalus Hrivniak & Godunko, 2018

Hrivniak, Ľuboš, Sroka, Pavel, Godunko, Roman J., Palatov, Dmitry, Polášek, Marek, Manko, Peter & Oboňa, Jozef, 2018, Diversity of Armenian mayflies (Ephemeroptera) with the description of a new species of the genus Ecdyonurus (Heptageniidae), Zootaxa 4500 (2), pp. 195-221 : 198

Ecdyonurus (Ecdyonurus) eurycephalus Hrivniak & Godunko , sp. nov.

( Figs 2–45 )

Type material (numbers in parentheses correspond to localities on Fig. 1 and Appendix 1).

Holotype: male imago: ARMENIA, Shirak province, NE of Musayelyan village; small steppe river, tributary of Akhurian River ; 41°00'13.15" N, 43°57'24.87"E; 2195 m a.s.l.; 02/09/2015, (36).

Paratypes: 2 male imagoes (genitalia and wings of 1 individual mounted on slide), 9 female (1 mounted on slide) and 6 male larvae (4 mounted on slide), same data as holotype (36) ; 10 female (2 mounted on slide) and 8 male larvae (1 mounted on slide): ARMENIA, Shirak province, NE of Musayleyan village; steppe stream, tributary of Akhurian River ; 41°00'20.12"N, 43°59'14.04"E; 2286 m a.s.l.; 02/09/2015, (35) ; 3 female and 1 male larvae: ARMENIA, Shirak province, N of Amasia village, steppe stream, tributary of Akhurian River ; 40°58'20.49"N, 43°46'06.88"E; 1987 m a.s.l.; 02/09/2015, (38) ; 1 female larva: ARMENIA, Shirak province, E of Aghvorik village, steppe stream, tributary of Akhurian River ; 41°04'21.19"N, 43°44'44.83"E; 2052 m a.s.l.; 03/09/2015, (39) ; 3 female (1 mounted on slide) and 5 male larvae (l mounted on slide): ARMENIA, Shirak province, E of Torosgyugh village, small steppe river, tributary of the Akhurian river ; 40°55'54.99"N, 43°52'45.26"E; 1885 m a.s.l.; 03/09/2015 , (40).

Other material studied (not type): 3 female and 1 male larvae, (36); 1 female larva: ARMENIA, Lori province, W of Katnarat, steppe stream, tributary of the Dzoraget River ; 41°03'59.85"N, 44°05'44.24"E; 1949 m a.s.l.; 02/09/ 2015, (33) ; 2 female and 1 male larvae, (35); 1 female larva, (40).

All types and other studied material were collected by P. Manko, J. Oboňa and Ľ. Hrivniak. Material is deposited in the collection of the Czech Academy of Sciences, Biology Centre, Institute of Entomology, České Budějovice, Czech Republic.

Figures

FIGURE 1. Distribution of sampling sites in Armenia. Occurrence of E. (E.) eurycephalus sp. nov. shown by red triangles. Sites sampled by D. Palatov marked with asterisk, other sites sampled by Ľ. Hrivniak, P. Manko & J. Oboňa. The numbers of sampling sites correspond to Appendix 1 and the codes on labels and field protocols of the respective collectors.

FIGURES 2–12. Ecdyonurus (Ecdyonurus) spp., male imagoes: 2–5, 8–12, E. (E.) eurycephalus sp. nov.: 2, 4, head lateral; 3, 5, head dorsal; 8, abdomen lateral; 9, abdomen ventral; 10, abdomen dorsal; 11, forewing; 12, hind wing; 6–7, E. (E.) ornatipennis: 6, head lateral; 7, head dorsal.

FIGURES 13–14. Ecdyonurus (Ecdyonurus) eurycephalus sp. nov., genitalia of male imago: 13, styliger, forceps and penis ventral; 14, penis dorsal.

FIGURES 15–23. Ecdyonurus (Ecdyonurus) eurycephalus sp. nov., larva: 15, habitus dorsal; 16, habitus ventral; 17, habitus lateral; 18, head dorsal; 19–21, semipronotum of mature larva; 22–23, semipronotum of early-instar larva.

FIGURES 24–26. Ecdyonurus (Ecdyonurus) eurycephalus sp. nov., mouthparts: 24, labrum dorsal (left) and ventral (right); 25, labrum contour; 26, labial glossae and paraglossae: left part ventral view, right part contour.

FIGURES 27–28. Ecdyonurus (Ecdyonurus) eurycephalus sp. nov., leg: 27, hind leg dorsal; 28a–h, setae on dorsal surface of femora.

FIGURES 29–30. Ecdyonurus (Ecdyonurus) eurycephalus sp. nov., larval abdomen and leg: 29, hind margin of middle femora; 30, posterior margin of tergum III.

FIGURES 31–45. Ecdyonurus (Ecdyonurus) eurycephalus sp. nov., gills (flattened on slide) and larval abdomen: 31–36, gill plate I: 31–34 mature larva; 35–36, early-instar larva; 37–39, gill plate IV: 37–38, mature larva; 39, early instar larva; 40–43, gill plate VII: 40–42, mature larva; 43, early-instar larva; 44, abdominal sterna V–IX (male); 45, sternum IX (female).