查看更多>>摘要：Three new species of the oribatid mite genus, Austrocarabodes, from South Africa are described, namely A. nortoni sp. nov., A. longisetosus sp. nov. and A. crassimarginatus sp. nov.. A supplementary description is given of A. pinnatus Mahunka, 1986. The known distribution of these species is given and a key to all South African species is presented.
查看更多>>摘要：A new small Arthroleptis from western Guinea, West Africa, is described. The new species differs from all known congeners by the combination of small size and a peculiar red dorsal colour with irregular large black and small white, yellow or blue spots. The ventral side is almost uniform greyish black with a few, small white spots. Males lack hypertrophied third fingers, digital and inguinal spines. Fingers and toe tips are slightly enlarged. The new species differs in its colour pattern, smaller size, broader toe and finger tips, the lack of hypertrophied third fingers and digital spines in males, and a mean of 4.7% in the investigated part of the mitochondrial 16S rRNA gene to A. aureoli, which is morphologically and genetically the most similar species. Genetic comparisons of the new species with other available Arthroleptis sequences from species found across Africa revealed genetic distances of 16.0-23.4%.
查看更多>>摘要：Two new species of freshwater gastrotrichs are described from a pond in Osaka, Japan. Chaetonotus retiformis n. sp. is a medium size species attaining a length of 180 um, characterized by a three-lobed head with a single tuft of sensory cilia on eachside and small scales with four long spines on the base of each member of the furca. Chaetonotus machikanensis n. sp. is a small size species attaining a length of 110 um in length, characterized by a five-lobed head with a two tufts of sensory cilia oneach side and large scales with long barbed spines.
ARIOVALDO A. GIARETTAFELIPE G. De FREITASMARTA M. ANTONIAZZICARLOS JARED...
7页
查看更多>>摘要：Phylogenetic hypotheses of species of Leptodactylus have been proposed but relationships often consider few species and high-level groups are supported by few, homoplasious morphological characters. Similarities between the reproductive biology of species of the L. marmoratus (formerly Adenomerd) and those of the L. fuscus group may represent homopla-sies or, as previously suggested, shared derived features pointing to their closer relationship. We determined the presence of buccal foaming glands intadpoles of three species of Leptodactylus (L. furnarius, L. labyrinthicus and a member of the L. marmoratus group) by histological preparations. The presence of these glands and other seven characters were mapped onto two alternative topologies in orderto understand the relationships among Leptodactylus species groups and the evolution of their reproductive features. Two sets of foaming glands were found in all species studied: 1) rows of secretory ridges and 2) secretory pits. Mapping the nine characters on the currently recognized phylogeny (emphasizing closer relationship among L. latrans, L. fuscus andL. labyrinthicus) resulted in sixteen steps (CI = 56; RI = 22); in the alternative hypothesis (closer relationship between L. marmoratus group andLeptodactylus of the L. fuscus groups) it resulted in eleven steps (CI = 82; RI = 78). Our evidences support that species in the L. marmoratus group are not the sister group to the remainder of Leptodactylus, but probably a subset of the L. fuscus group.
查看更多>>摘要：The taxonomy of the freshwater crabs living in the rivers draining from the mountains in the eastern Democratic Republic of the Congo and Rwanda into Lake Kivu is revised. Four species are recognized: Potamonautes perparvus (Rathbun, 1921), P. minor Bott, 1955, P. gonocristatus Bott, 1955, and P. semilunaris Bott, 1955. Updated diagnoses, illustrations, and distribution maps are provided for the species. The four species are compared to each other, and an identification key to all eight species foundin Lake Kivu and its drainage basin is included.
查看更多>>摘要：Pseudomonocelis paupercula nov. sp. is described from brackish-water habitats of the Mediterranean. It is distinguished from other members of the genus by the copulatory organ provided with a stylet, combined with lack of vagina and presence of a muscular organ close to the female pore. Its phylogenetic relationships have been investigated sequencing complete 18S rRNA gene and partial 28S rRNA gene, spanning variable domains D1-D6. Both BI and ML suggest a sister-taxon relationships of P. pauperculanov. sp. with the east African P. cf cavernicola. However, statistical support is low. Conversely, MP indicates P. paupercula nov. sp. as sister-taxon to all the remaining Pseudomonocelis and Minona ilenae. Overall, results of the combined analysis do not support the monophyly of the genus Pseudomonocelis. The need for wider molecular and taxonomic sampling is stressed.
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