| abstract | The present paper deals with 3 new species of Hirstionysgus Fonseca collected off small mammals from Qinghai Province, China.
1. Hirstionyssus qinghaiensis sp. nov.
Female (figs. 1-4): All dorsal setae present and small, only F3, T, V, ET1 rather long. Tectum pointed anteriorly, with, denticles on the margin (fig. 2, B) or anterior margin round with concavity in middle, also with denticles (fig. 2, A). Coxal spur formula 0-1-2-0. Tarsus II without claw-like setae.
Holotype female and paratypes 2 females were collected on Sept. 14, 1982, off Microtus oeconomus Pallas, the other 4 females on June 14 (3 females) and Aug. 25, 1982 (1 female), off Mustela altaica Pallas, from Henan Mongo Autonomous County, 34°46’ N, 101°30’E. 2 paratypes were deposited in the Department of Parasitology, Guiyang Medical College, and all other specimens deposited in the Research Institute of Endemic Disease Control, Qinghai Province.
This new species is distinguished from the closely related species Hirstionyssus stoliczkai Dusbabek et Daniel, 1975 by the following differences: 1) coxal spur formula: 0-1-2-0 in new species, and 0-1-1-0 in latter species; 2) the new species bearing 12 setal pairs on the bared venter, the latter species bearing 25 setal pairs and one of them behind the anal plate longer than all others; 3) the new species with more pointed antero-lateral and postero-lateral angles of sternal plate, while those of the latter species comparatively short (anterolateral angles) and round (postero-lateral angles).
2. Hirstionyssus pratentis sp. nov.
Female (figs. 5-10): Dorsal plate bearing 26 pairs of small setae, the anterior 6 pairs and M11 longer. Tectum expanded terminally, with many denticles, the lateral ones long and curved, rosette in form (fig. 6). Coxal spur formula 0-1-2-0. Tarsus II with a pair of claw-like setae, av1 of tarsi III and IV acutely spiniform.
Holotype female and paratype 1 female were collected on July 18, 1982 and another paratype female on June 14, 1982, off Myospalax fontanieri Milne-Edwards from Henan Mongo Autonomous County, Qinghai Province, 34°46’N, 101°30’E. One paratype is deposited in the Department of Parasitology, Guiyang Medical College, and the other specimens deposited in the Research Institute of Endemic Disease Control, Qinghai Province.
This new species resembles Hirstionyssus myospalacis Zemskaya et Piontkovskaya, 1957, but may be differenciated in: 1) idiosoma of new species smaller and with round posterior end, while that of the latter species larger and posterior end concave; 2) posterior end of dorsal plate broadly rounded in new species and narrow in the latter; 3) absence of an apophysis on venter of coxa II in new species; 4) genitoventral and anal plates of new species wider than those of the latter species.
3. Hirstionyssus punctatus sp. nov.
Female (figs. 11-14): Dorsal plate bearing 26 pairs of small setae. End of tectum expanded and with denticles divided into several parts (fig. 12). Sternal plate rather long. Anal plate tympanic in shape, Ad before the transverse middle line of the anus. Coxal spur formula 0-1-2-0. Venter of coxa II bearing an apophysis. Tarsus II with 2 claw-like setae and a short acutely spiniform seta.
Holotype female was collected on Sept. 14, 1982, off Microtus oeconomus Pallas, from Henan Mongo Autonomous County, Qinghai Province, 34°46’ 101°30’E. Specimen is deposited in the Research Institute of Endemic Disease Control, Qinghai Province.
This new species is near to Hirstionyssus mustelae Teng et Pan, 1963, but with following differences: 1) new species smaller than the latter; 2) anterior and posterior margin of sternal plate concave in new species and convex in the latter; 3) setae on unarmed venter of new species less in number and smaller than those of latter species;4) 1-2 spiniform setae on tarsi III and IV of the latter species but lacking in new species. |