| abstract | A new species of the genus Hirstithrombium is described from China. With comparisons of descriptions of known species and with references to Thor et al. (1947) and Feider (1955), a revision of the generic diagnosis and a key to known adults of the genus are proposed. Hirstithrombium Oudemans, 1940
Two sensillary areas contiguous, without a cutting in between them but with a pair of setae. A naso anterior to crista metopica. Palpal tarsus cone-shaped, with a terminal spine and two subterminal spines. Anterior end of palpal tibia bearing a thick conical spine on its ventral side. Tarsus I swollen.
Type species: Diplothrombium australiense Hirst, 1928
Key to the Adults of the Genus Hirstithrombium
1. Sensillary areas at the posterior part of crista metopica, eyes very near to crista metopica H.australiense (Hirst)
not as above 2
2. Sensillary areas at the middle part of crista metopica, leg I shorter than idiosoma H. machadoi (Andre) comb.nov.
Sensillary areas at the anterior part of crista metopica, leg I longer than idiosoma 3
3. A pair of weakly sclerotized areas between two sensillary areas dorsal seta 25-30µm, crista metopica 125µm H. meridionalis sp.nov.
Without weakly sclerotized areas between two sensillary areas, dorsal setae 40-50µm, crista metopica 90µm H. noemiae Feider
Hirstithrombium meridionalis, sp.nov. (fig.1-10)
Adult: Similar to H. noemiae, but can be recognized by the following features: Idiosoma 650?m long, 500-650µm wide. Dorsal seta 25-30µm long. Crista metopica 125µm long. A pair of weakly sclerotized areas between two sensillary areas. Two pairs of eyes on a pair of peduncules. All legs longer than idiosoma, with leg I, II, III. and IV 720- 748µm, 700-708µm, 700-712µm and 800µm long respectively. A skeleton of penis in male. Genital opening 130µm long. Anal pore 80-90µm long.
Types: Holotype, allotype and 5 paratypes, collected by Yu Hong on soil surface in April, 1984 in Guangzhou, China and deposited in the Department of Biology, Fudan University, Shanghai, China. |