| abstract | Steatonyssus nyctali, sp. nov.
Female (figs, 1--3) Idiosoma oval, 833×554µ. Podosomal plate with 11 setal pairs, V about 3/4 length of D1. Opisthosomal plate long and narrow, bearing 7 setal pairs, S8 minute, S6 only 1/3 to 1/4 length of D8, M11, rather larger than M10. About 60 pairs of setae on the unarmed dorsum.
Sternal plate with strongly sclerotized band on posterior margin, St1 about 1/2 length of St3. Genitoventral plate without medium protrusion on anterior margin. Anal plate elonated, pyriform, 3 anal setae subequal in length. Longest caudal. seta 90µ in length. About 35 setal pairs on the unarmed venter, smaller than the dorsal ones.
Peritreme reaching the hind portion of coxa II, peritrematal plate with a leaf-like expansion ending about the middle of coxa I.
Male (figs. 4-6) and deutonymph (figs. 7-8) are also described in the Chinese text.
Holotype (♀), allotype (♂) and paratypes (4♀♀, 6♂♂, 104 deutonymphs) were collected off Nyctalus noctula Schreber, from Guiyang City, Guizhou Province, on June 6, 1979. Specimens are deposited in the Department of Parasitology, Guiyang Medical College.
There are many species of Steatonyssus with 11 setal pairs on podosomal plate and 7 setal pairs on opisthosomal plate, among them S. longispinosus, S. hsui, S. periblepharus, S. joaquimi and S. spinosus resemble the new species.
The peritreme plate of the new species is evidently different from S. hsui and S. longispinosus, the number of setae on the dorsal plate of male and on the opisthosomal plate of nymph in the new species exceeds that of the other two species. S. periblepharus has medium protrusion on the anterior margin of epigyneal plate. Seta V on dorsal plate of S. joaquimi is obviously degenerated, its length being only 1/6 of the length of D1, and M11, is quite minute and smaller than M10. The length of M11 of S.spinosus is twice that of M10, and the anterior seta on coxa III bears a plate-like expansion. Therefore all the above listed species may be easily differenciated from the new species by these characteristics. |