Abstract
The adult male, pupa, and fourth instar larva of Symbiocladius (s. s.) villosus Makarchenko et Makarchenko, sp. n. from the Russian Far East and Japan are described and figured. Adult male of a new species separated from all known species of subgenus by presence of a pair rodshaped chitinized structures which situated above apical parts of phallapodemes, and is closely related to the Palaearctic species S. (s. s.) rhithrogenae and the Nearctic S. (s. s.) chattahoocheensis. S. (s. s.) villosus sp. n. can be distinguished from the first species by shape of gonostylus which expands from the base to the middle and with longer and more numerous setae. From S. (s. s.) chattahoocheensis a new species can be separated by roundish-triangular dorsal part of inferior volsellae and presence of 2 megasetae on gonostylus.
Highlights
Prior to the present study, the genus Symbiocladius Kieffer, 1925 included 3 species in the subgenus Symbiocladius sensu stricto – S. (S.) chattahoocheensis Caldwell (U.S.A.), S. (S.) equitans (Claassen) (U.S.A., Canada), and S. (S.) rhithrogenae (Zavřel) (Palaearctic region) – and 3 species in the subgenus Acletius Roback – S. (A.) aurifodinae Hynes (Australia), S. (A.) renatae Spies (Argentina, Chile), and S. (A.) wygodzinskyi Roback (Argentina, Chile) (Ashe and O’Connor 2012)
We provide a description of the adult male, pupa, and fourth instar larva of Symbiocladius (s. s.) villosus sp. n. from the Russian Far East and Japan
Rearing of adult males from the larva and pupa, and determination of mayfly nymphs inhabited by S. (s. s.) villosus sp. n., was carried out by Dr T
Summary
Prior to the present study, the genus Symbiocladius Kieffer, 1925 included 3 species in the subgenus Symbiocladius sensu stricto – S. (S.) chattahoocheensis Caldwell (U.S.A.), S. (S.) equitans (Claassen) (U.S.A., Canada), and S. (S.) rhithrogenae (Zavřel) (Palaearctic region) – and 3 species in the subgenus Acletius Roback – S. (A.) aurifodinae Hynes (Australia), S. (A.) renatae Spies (Argentina, Chile), and S. (A.) wygodzinskyi Roback (Argentina, Chile) (Ashe and O’Connor 2012). We provide a description of the adult male, pupa, and fourth instar larva of Symbiocladius The associations between larva, pupa and adult male of S. Larvae and pupae were collected from nymphs belonging to 9 host species of Ephemeroptera, family Heptageniidae – Cinygma lyriformis McDunnough, Ecdyonurus aspersus Kluge, Ec. joernensis Bengtsson, Epeorus ninae Kluge, Ep. pellucidus (Brodsky), Heptagenia flava (Rostock), Rhithrogena japonica Ueno, Rh. lepnevae Brodsky, and Rh. sibirica Brodsky (Table 1).
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