taxonID	type	description	language	source
3CAFD9C5F3915B42902914E2B529FA07.taxon	description	Figures 4, 5	en	Hrivniak, Ľubos, Sroka, Pavel, Bojkova, Jindriska, Godunko, Roman J., Manko, Peter (2021): A new species of Epeorus (Caucasiron) (Ephemeroptera, Heptageniidae) from Azerbaijan and Iran. ZooKeys 1068: 13-26, DOI: http://dx.doi.org/10.3897/zookeys.1068.70717, URL: http://dx.doi.org/10.3897/zookeys.1068.70717
3CAFD9C5F3915B42902914E2B529FA07.taxon	materials_examined	Other material (damaged larvae). 4 larvae (2 barcoded and mounted on slide; labelled CFC 4, CFC 3): same data as holotype. 1 larva (barcoded; labelled N 3): Iran, Gilan Province, W Chelvand village (S of Lavandvil village), Chelavand River (about 2.5 km from its mouth); 38.2888889 N, 48.8597222 E (locality no. 27); - 4 m a. s. l.; J. Bojkova, T. Soldan, J. Imanpour Namin leg., 19.5.2016.	en	Hrivniak, Ľubos, Sroka, Pavel, Bojkova, Jindriska, Godunko, Roman J., Manko, Peter (2021): A new species of Epeorus (Caucasiron) (Ephemeroptera, Heptageniidae) from Azerbaijan and Iran. ZooKeys 1068: 13-26, DOI: http://dx.doi.org/10.3897/zookeys.1068.70717, URL: http://dx.doi.org/10.3897/zookeys.1068.70717
3CAFD9C5F3915B42902914E2B529FA07.taxon	etymology	Etymology. The name refers to the distribution of the species in the Hyrcanian forest.	en	Hrivniak, Ľubos, Sroka, Pavel, Bojkova, Jindriska, Godunko, Roman J., Manko, Peter (2021): A new species of Epeorus (Caucasiron) (Ephemeroptera, Heptageniidae) from Azerbaijan and Iran. ZooKeys 1068: 13-26, DOI: http://dx.doi.org/10.3897/zookeys.1068.70717, URL: http://dx.doi.org/10.3897/zookeys.1068.70717
3CAFD9C5F3915B42902914E2B529FA07.taxon	distribution	Distribution and habitat preferences of larvae. The species is distributed in northwestern Iran and southeastern Azerbaijan (Fig. 1) at - 4 to 1345 m a. s. l. Larvae were found in streams and rivers flowing to the Caspian Sea in the humid forested slopes of western Alborz. They likely inhabit only cold and clear streams and rivers with stony bed substrate and turbulent flow. The species was not found in urban and agricultural areas in this region where many localities were investigated. Larvae were not abundant in either locality and co-occurred with the more abundant E. (C.) znojkoi.	en	Hrivniak, Ľubos, Sroka, Pavel, Bojkova, Jindriska, Godunko, Roman J., Manko, Peter (2021): A new species of Epeorus (Caucasiron) (Ephemeroptera, Heptageniidae) from Azerbaijan and Iran. ZooKeys 1068: 13-26, DOI: http://dx.doi.org/10.3897/zookeys.1068.70717, URL: http://dx.doi.org/10.3897/zookeys.1068.70717
3CAFD9C5F3915B42902914E2B529FA07.taxon	description	Description of larva. General coloration of larvae yellowish-brown, with dark brown to reddish maculation. Body length of male mature larva 8.25 mm (n = 1); cerci broken. Body length of female mature larvae unknown. Head. Shape oval to trapezoidal (Fig. 4 D, E). Anterior margin with shallow concavity medially. Head dimensions: length 2.20 mm, width 3.04 mm (male); dimensions of female mature larva unknown. Head width / length ratio 1.36 - 1.41 (male), 1.40 - 1.44 (female). Coloration pattern as in Figure 4 D, E. Dorsal surface of head covered with fine hair-like setae and sparsely distributed stick-like setae. Sparse longer hair-like setae located posteriorly to eyes. Mouthparts. Labrum (Fig. 5 A) widened anteriorly, with anterior margin slightly rounded (in dorsal view). Lateral angles rounded (shape of labrum may vary among specimens). Dorsal surface (Fig. 5 A, right half) sparsely covered with setae of different size; four longer bristle-like setae located antero-medially and two antero-laterally. Epipharynx with longer, slightly plumose bristles situated along lateral to anterior margin (Fig. 5 A, left half; range of setation figured as large black dots), and cluster of fine, hair-like setae medially (not figured). Posterior margin of labrum irregularly concave; group of 11 - 13 setae of various sizes located on ventral surface close to posterior margin. Outer incisors of both mandibles (Fig. 5 B, C) with three apical teeth; outer tooth blunt in both mandibles. Inner incisor of left mandible with three apical teeth (Fig. 5 B), right inner incisor bifurcated (Fig. 5 C). Thorax. Pronotum anteriorly narrowed, lateral edges nearly straight. Metanotum with slight postero-medial projection. Dorsal surface covered with fine, hair-like setae (as on abdominal terga and head); sparse longer hair-like setae along pro-, meso- and metanotal suture. Legs. Colour pattern of femora as in Figure 4 F, G. Femora with medial hypodermal spot; often distally blurred (Fig. 4 F) or poorly expressed (Fig. 4 G). Patella-tibial suture darkened; tarsi proximally and distally darkened. Coxal projections of fore- and hind legs pointed or bluntly pointed; in middle legs blunt. Spatulate setae on dorsal surface of femora short, sporadically elongated (Fig. 5 D). Tarsal claws with 3 - 4 denticles. Abdominal terga. Colour pattern of abdominal terga (Fig. 4 A, H-I) consisting of transversal stripe along anterior margin of terga I-IX (X), medially extending, forming rectangular or triangular macula on terga II-IV (sometimes blurred), triangular macula on terga V-VII, and triangular or rectangular macula on terga VIII-IX (X). Lateral margins with oblique maculae on terga I-VIII (IX). Denticles on posterior margin of terga relatively dense, of various sizes, pointed and sometimes curved (Fig. 5 E). Surface of terga covered with hair-like setae and sparsely with stick-like setae. Tergum X with short or without postero-lateral projections (Fig. 5 L, M; arrow). Medial longitudinal row of hair-like setae along abdominal terga present. Abdominal sterna. Yellowish, with dark brown to blackish pattern. Sterna II-VI with a pair of oblique stripes (medio-anterior sigilla) and a pair of stripe-like (or elongated triangular) medio-lateral maculae joined to medio-anterior sigilla (Fig. 4 L-N; arrows). Intensity of colouration varies among individuals; stripe-like (or elongated triangular) medio-lateral stripes sometimes poorly developed (Fig. 4 O). Nerve ganglia darkened. Sternum IX with V-shaped medial emargination; surface covered by irregularly distributed hair-like setae (Fig. 5 N). Gills. Dorsal surface of gill plates I yellowish; of gill plates II-VII yellowish on anterior half, brownish to reddish on posterior half. Ventral margin of all gill plates yellowish to greyish. Projection of gill plates III poorly developed (Fig. 5 G; arrow). Gill plates VII relatively wide (in natural position of ventral view; Fig. 4 J, K; 5 H-K). Cerci. Yellowish brown, basally darkened.	en	Hrivniak, Ľubos, Sroka, Pavel, Bojkova, Jindriska, Godunko, Roman J., Manko, Peter (2021): A new species of Epeorus (Caucasiron) (Ephemeroptera, Heptageniidae) from Azerbaijan and Iran. ZooKeys 1068: 13-26, DOI: http://dx.doi.org/10.3897/zookeys.1068.70717, URL: http://dx.doi.org/10.3897/zookeys.1068.70717
