查看更多>>摘要：We explored the patterning of genetic diversity within white-toothed shrews of the genus Crocidura from 14 localities across Vietnam. An analysis of cytochrome oxidase c subunit I (COI) and cytochrome b (cytb) gene fragments from 185 specimens of white-toothed shrews of the genus Crocidura from 14 localities across Vietnam revealed six deeply divergent (p-distance for both COI andtytb >10%) lineages, corresponding to the morphological species C. sokolovi, C. zait-sevi, C. phuquocensis, C. indochinensis, C tanakae and, C. phanluongi. Crocidura sokolovi was distinct from all other Vietnamese white-toothed shrews (-13% on average for both cytb and COI). In addition to demonstrating the genetic separation of previously described species, substantial cryptic genetic diversity was revealed. Crocidura zaitsevi and C. tanakae each included two subgroups that corresponded to geographically remote localities, while C indochinensis contained two distinct subgroups that exhibited co-varying patterns of morphological and ecological differentiation, suggesting that the individuals from Sa Pa represent a separate species (provisionally named Crocidura sp. AB1). Mitochondrial data generated for the type specimens of C. phanluongi from Yok Don and Bu Gia Map supported the validity of the species while an additional specimen from Binh Chau, South Vietnam originally referred to C. phanluongi exhibited a deep genetic split {cytb: 8.4%; COI: 8.7%) from a neighbouring population in Yok Don. We propose that the specimen from Binh Chau also represents an undescribed species (provisionally named Crocidura sp. AB2). Our cytb data were then compared to the sequences of 28 species of Crocidura from Southeast Asia available in GenBank, suggesting that three more species occur in northern Vietnam, namely C. wuchihensis, C. attenuata and C.fuliginosa/C. dracula. The discovery of fairly deep genetic divergences among Vietnamese Crocidura illustrates that the understudied and largely undescribed diversity of white-toothed shrews in Southeast Asia requires deeper scrutiny. It also shows the useful insights of mitochondrial markers as to the taxonomic resolution of this enigmatic group of mammals.
查看更多>>摘要：A new species of squat lobster, Babamunida debrae, was found in shallow waters of the west coast of Hawai'i. It is readily distinguished from all the other species of the genus by the presence of a pair of spines on the second abdominal tergite. Babamunida debrae is the second species of the genus from Hawaii and seventh species of the genus from the Indo-Pa-cific.
查看更多>>摘要：Terrestrial tardigrades were collected from moss, lichen and leaf litter from Grand Cayman in the Cayman Islands, West Indies. Six species were found. Milnesium tardigradum Doyere, 1840, Minibiotus intermedins (Plate, 1889), Paramacro-biotus areolatus(Murray, 1907) and P. richtersi (Murray, 1911) have been reported previously from other islands in the Caribbean Sea. Two species on Grand Cayman were new to science. Doryphoribius tessellatus sp. n. belongs to the 'eveli-nae-group', with two macroplacoids and cuticular gibbosities. In having two pairs of posterior gibbosities and cuticular depressions forming a reticular design, it is most similar to Doryphoribius quadrituberculatus Kaczmarek & Michalczyk, 2004 from Costa Rica. It differs from D. quadrituberculatus in its gibbosity sequence (111:4:2:2), the number of teeth, size of macroplacoids and details of the reticular design on the dorsal cuticle. Macrobiotus caymanensis sp. n. belongs to the 'polyopus-gvoup' of species. It differs from other species of the group in having a shorter buccal tube, a more posterior stylet support insertion point and fewer, larger egg processes.
JEANNE CASTRITSI-CATHARIOSROB W. M. VAN SOESTEFTHIMIOS KEFALASJEAN VACELET...
22页
查看更多>>摘要：Spongia (Spongia) zimocca (Schmidt, 1862) is a real problem for taxonomists. This is due to the fact that it exhibits a wide diversity of forms as well as similarities with other species of the genus. Nevertheless, professional sponge fishermen are able to recognize this species easily based on their own empirical criteria. The lack of easily recognized taxonomic characters in conjunction with the ambiguity concerning the original description makes necessary an updated description of the species. Wetried to solve the uncertainty existing among the taxonomists who have been involved with the description of this Mediterranean sponge, basing our description on the Schmidt type specimen and on material deposited in the Amsterdam Museum. In this paper we have summoned up not only the known morphological characters used for the identification of other species belonging to this genus (color, size, shape, skeleton structure, size of the fibers) but also additional morphological characters, used for a first time, aiming to obtain a clearer picture. These new characteristics are: tensile strength, skeletal density, morphology of the conules and the organic content of the fiber mass.
查看更多>>摘要：Two new species of goby, Eviota ancora and Eviota rubriguttata, are described from the Ryukyu Islands, Japan. Eviota ancora belongs to the cephalic sensory-pore system pattern group 2, has a dorsal/anal fin-ray formula of 8/7, simple pectoral-fin rays, and a distinctive hook-shaped orange mark on the side of the head in life. Eviota rubriguttata belongs to the cephalic sensory-pore system pattern group 1, has a dorsal/anal fin-ray formula of 8/7, branched pectoral-fin rays, the body peppered with tiny black chromatophores, and round red spots on the dorsal and anal fins in life.
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