К изучению дендролеляпин Северной Америки (Multidendrolaelaps, Rhodacaridae, Gamasina)

Abstract

Multidendrolaelaps trispinosus sp. n. is similar to M. ulmi, females, males and nymphs of the new species sharply differ in the presence, apart of Pl₄, incrassed M₉ and Pl₅. M. inconstans sp. n. is similar to M. tetraspinosus, males and females differ in smaller size, shorter peritremes, females-in ventro-anal shield shape, shorter and wider, weakly sclerotized tubular part of seminal receptaculum, males-in short spermodactylus. M. harlbutti sp. n.- females similar to M. isodentatus, clearly differ in ventro-anal shield shape. Ionger D₈ (2✕D₂) and S₆ (reach the half length of S₆), M₉ and Pl₅. M. epistospinosus sp. n.- mostly similar to M. euepistomus and M. euepistosimilis, differ from both males and females of the new species in longer hypostomal row and longer S₈, from M. euepistomus-in longer peritremes, lower teeth number on movable cheliceral finger in female, spermoductyle shape and presence of fusiform S₇ in male, from males of M. euepistosimilis-in longer D₈ and S₆, large medial tectum projection, punctuated cuticle in the area of humeral chetae and in anterior angles of hind shield and in absence of that between chetae D₆-D₇. M. spinosus elongatus females differ from those of nominate subspecies in elongated body shape, longer anterior shield, relatively longer D₈, ventro-anal shield shape. Type material is deposited in Biosystematics Research Institute, Ottawa, Canada. The reason is suggested to unite subgenera Epistodendrolaelaps and Multidendrolaelaps into a distinct genus, its diagnosis is improved by a number of characters.