Watters g t (10 risultati)

Soft cover. Condizione: New. xxi, 362 pages : illustrations, maps ; 24 cm.

Imperial octavo softcover (VG+); all our specials have minimal description to keep listing them viable. They are at least reading copies, complete and in reasonable condition, but usually secondhand; frequently they are superior examples.Ordering more than one book will reduce your overall postage cost.…

A new species, Licina auffenbergi, is described from the Montagnes Noires of Haiti. Problems with the delineation of Licina and other pseudolamellate taxa are discussed. New taxon: Licina auffenbergi n. sp. 6 pp., 2 pls, 4.

20 pp., 16 figs, gr. 8.

Conglutinates and conglutinate-like objects of 60 species of North American freshwater mussels were examined using scanning-electron microscopy. These structures were found to have a compexity and range of form previously unrealized. They may be organized into groups having similar morphologies. These groups approximate the currently recognized higher taxa and will serve to bolster support for them as phylogenetically coherent groups. In particular the genera Ptychobranchus, Dromus, Obliquaria, Lasmigona, and Strophitus have unique conglutinate-like structures. Superconglutinates most closely resemble collections of amblemine conglutinates. The results of this study may be used in conjunction with other phylogenetic databases (genetic, adult morphology, behavior, etc.) to construct phylogenetic associations based on a more whole-animal approach. 20 pp., 64 figs, stapled 4. …

Recent species of the Acanthochitoninae in the eastern Pacific are reviewed. Members of the genus Acanthochitona include: A. angelica Dall, 1919, A. avicula (Carpenter, 1864), A. exquisita (Pilsbry, 1893), A. ferreirai Lyons, 1988, A. hirudiniformis hirudiniformis (Sowerby I, 1832), A. hirudiniformis peruviana (Leloup, 1941), and A. imperatrix Watters, 1981. A new genus, Americhiton, is created for A. arragonites [bas. Acanthochitona arragonites] (Carpenter, 1857), type species, and the western Atlantic species A. andersoni (Watters, 1981), A. balesae (Abbott, 1954), and A. zebra (Lyons, 1988). 21 pp., 93 figs, 4. …

Hardcover. , 10 figs, 56 distribution maps, hardbound 0.0.

Species of the North American freshwater mussel (Unionidae) genus Villosa are reviewed. True Villosa are limited to the extreme southeastern United States. Additional nominal Villosa taxa are placed in the new genera Paetulunio (type species Unio fabalis), Cambarunio (type species Unio iris), Leaunio (type species Unio lienosus), and Sagittunio (type species Unio nasutus). Other species are allocated to the existing genera Obovaria and Venustaconcha. New taxa: Paetulunio n. gen., Cambarunio n. gen., Cambarunio dactylus anatinensis n. ssp., Cambarunio dactylus viridensis n. ssp., Cambarunio hesperus n. sp., Leaunio n. gen., Leaunio lienosus aquilonius n. ssp., Leaunio lienosus ouachitaensis n. ssp., Leaunio pataecus n. sp., Sagittunio n. gen., Sagittunio aldermani n. sp. 139 pp., 35 pls, num. figs & distribution maps, br. 4. …

584 p., 10 figs, 56 distribution maps, hardbound. New copy.