查看更多>>摘要：Three species of Grammostola (Araneae, Mygalomorphae, Theraphosidae) from central Argentina are redescribed and illustrated and their geographic distributions are reported. A new synonymy between G. vachoni Schiapelli & Gerschman 1961 and G. schulzei(Schmidt 1994) n. syn. is proposed. We did not find zones of co-occurrence with the three species but, in several localities, we found two Grammostola species in sympatry. The surface ultrastructure of three types of coxal setae was studied by scanning electron microscopy (SEM). Two morphological types of spiniform setae were found on the coxae. The first type consisted of short and strong piriform setae, with the surface completely covered by ridges, and the second type consisted of long and thinner spiniform setae, with a piriform basal portion. The basal portion of the setae had ridges, the central portion was smooth and the apical zone had numerous short barbs with curved tips. The different types of setae found in these Grammostola species are clearly distinguished, and could be new useful character to diagnose at least these species. In combination with other characteristics, these characters could probably help to solve the problems in other species of this difficult genus if not also other genera.
查看更多>>摘要：A new genus of oribatid mite, Spineremaeus is erected and its type species, S. smithi sp. nov., is described from Norfolk Island, as well as three new species belonging to the genus Scapheremaeus. Spineremaeus is morphologically closest to the Emarginatus species-group of Scapheremaeus, found in Australia, Java and New Zealand. Scapheremaeus pinguis sp. nov. is closest morphologically to S. emarginatus from New Zealand. Scapheremaeus pacificus sp. nov. and S. tumidus sp. nov., members of the Carinatus species-group, are closest morphologically to each other and to S. insularis, also from New Zealand. Thus all four cymbaeremaeid species from Norfolk Island show strongest biogeographical affinities with the oribatid fauna of New Zealand rather than Australia.
查看更多>>摘要：Three new species of eriophyoid mites from Montenegro are described and illustrated. The first, Phytoptus alchemillae n. sp. (Phytoptidae), is found on the basic rosette of leaves of Alchemilla hoppeana (Rchb.) D. Torre, aggr. (Rosaceae). The second species, Leipothrix menthae n. sp. (Eriophyidae), is located on the undersurface of Mentha piperita L. (Lamiaceae) leaves and the third species, Aculus blagayanae n. sp. (Eriophyidae), inhabits the receptacles of the subendemic plant species, Daphne blagayana Frey. (Thymelaeaceae). All three species are vagrants, causing no visible damage to their plant host.
查看更多>>摘要：A new species of planktonic genus Polyarthra Ehrenberg, 1834 was found in water bodies of north-eastern Argentina along the Parana River and Uruguay River systems. This species, which belongs to the group that has a pair of ventral additional paddles,shares several features with other species of the genus particularly with P. dolychoptera Idelson, 1925, P. luminosa Kutikova, 1962, and P. indica Segers and Babu, 1999. Polyarthraplatensis sp. nov. can be distinguished from other species of the genus by at least two autapomorphic traits, 1) the structure of dorsal integument and 2) the unusual heterogeneity in the composition of paddle bundles. Moreover, this species exhibits a specific combination of diagnostic features including the structure of thetrophi having bare manubria, unci with a single tooth and absence of teeth before and after the strong major tooth on the rami. The discovery of this new species indicates that a revision of the genus in the Neotropical Region is pressingly needed. Thisstudy provides an updated species identification key for this genus in the Neotropical Region.
查看更多>>摘要：A new species of legless lizard, Dibamus dalaiensis sp. nov. of the family Dibamidae is described from Phnom Dalai in Phnom Samkos Wildlife Sanctuary, southwestern Cardamom Mountains, Cambodia, based on the following unique combination of characters:maximum SVL 127.6 mm; tail 18-22% of SVL; a single postocular scale; three scales bordering the posterior edge of first infralabial; an enlarged, medial, sublabial scale; labial and nasal sutures complete; rostral suture present but incomplete; 20 midbody scale rows; 22 scale rows just posterior to head and 20 scale rows just anterior to vent; 185-209 ventrals; and 48-52 subcaudal scales. The discovery of D. dalaiensis sp. nov. represents a new family, genus and species record for Cambodia.
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