Deep Water Pyramidelloidea Central (8 results)

Rústica. Condition: Nuevo. Dust Jacket Condition: Nuevo. ZONUNIV.

Tapa blanda. Condition: New. PEÑAS, A. / E. ROLAN: DEEP WATER PYRAMIDELLOIDEA FROM THE CENTRAL AND SOUTH PACIFIC, 3: THE TRIBES "EULIMELLINI" AND "SYRNOLINI". 978-84-16533-79-4, UNIV. DE SANTIAGO DE COMPOSTELA, 2016. Nuevo 775 gr. Libro.

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This work is the continuation of the study of the Pyramidellidae from deep waters in the Central and Tropical South Pacific collected by IRD and MNHN in numerous campaigns over the years. In this work the species belonging to the tribes Eulimellini and Syrnolini have been included. In total 154 species have been studied, 8 of which were previously known (but one with a non valid name), whereas the remaining 146 proved to be new to science. The type material of the already known species is displayed and micrographs to the scanning electron microscope of the material of the new species have been shown. In the tribe Eulimellini, a total of 110 species have been studied; they belong to six genera: Hamarilla, Ebalina, Eulimella, Raoulostraca, Bouchetmella (new genus) and Careliosis. The great majority of species (92) were included in the genus Eulimella. In the tribe Syrnolini, 44 species have been studied, belonging to 6 genera: Iphiana, Syrnola, Puposyrnola, Colsyrnola, Styloptygma and Aghata; most species (35) were included in the genus Syrnola. In the Conclusions and Comments part, information about the number of specimens collected for each species, its geographical distribution and bathymetry area are mentioned. A new name is given to Eulimella angusta (Saurin, 1959) non Watson, 1886. 301 pp., 75 figs, br. gr. 8.

The work focuses on the genera and species of the tribe Chrysallidini (Gastropoda, Pyramidelloidea) from deep water of the tropical Central and South Pacific, collected mainly during Tropical Deep-Sea Benthos expeditions conducted by IRD and MNHN in New Caledonia, Solomon Islands, Fiji, Tonga, Vanuatu, Wallis and Futuna, French Polynesia and the Philippines. I total, 233 species are reported on, among which only 21 could be identified to previously known species and 212 are described as new to science. The genus Chrysallida Carpenter, 1856 defined in a restricted sense was not found represented in our material, and the studied species are distributed in the following genera: 8 in Helodiamea n. gen., 1 in Polemicella Schander, Hori & Lundberg, 1999, 1 in Waikura Marwick, 1931, 1 in Trabecula Monterosato, 1884, 1 in Perheida n. gen., 6 in Ovalina n. gen., 2 in Folinella Dall & Bartsch, 1904, 50 in Parthenia Bucquoy, Dautzenberg & Dollfus, 1883, 84 in Pyrgulina A. Adams, 1863, 12 in Quirella Laseron, 1956, 4 in Mumiola A. Adams, 1863, 3 in Herewardia Iredale, 1955, 3 in Costabieta Laseron, 1956, 2 in Eurathea Laseron, 1959, 1 in Maricarmenia n. gen., 17 in Miralda A. Adams, 1863, 18 in Oscilla A. Adams, 1863, 6 in Babella Dall & Bartsch, 1906, 12 in Rissopsetia Dell, 1956 and 1 in Careliopsis Mörch, 1875 (the latter, as addendum in tribe Turbonillini). The genus Rissopsetia is tentatively included within the Chrysallidini. Most of the species are rare: there are 32 species represented only by one shell, 101 species by less than three, whereas only 14 species are represented by more than 50 specimens or shells. The highest number of species was found in the Solomin Is. (141 species), followed by Fiji (74 species), Vanuatu (65 species), New Caledonia (59 species), the Philippines (40 species) whereas species richness was lower in the Marquesas (32 species) and Australes Archipelago (5 species). About half of the species (115) were found in only one island group, these possibly endemic species being generally between 16.2% (Fiji Is.) and 31.9% (Solomon Is.) of the total number of species; a still higher number of endemic species was found in Tonga (50%) and Astrales Archipelago, but this regards a very small number of species and the proportion of unique species in the remote Marquesas Archipelago (28.1%) is suprisingly lower than in the Solomon Islands. There are very few widespread species: only four species (Parthenina extenta n. sp., Parthenina copiosa n. sp., Pyrgulina perscalata (Hedley, 1909), Pyrgulina pupaeformis (Souverbie & Montrouzier, 1865)) were found in five or more island groups, and 16 more in four island groups. Vigo. 412 pp., 122 figures/plates, hardcover 22 x 28 cm.