Bogan a e (22 résultats)

Hardcover. Etat : Near Fine. 1989. Zoology, Mammals. Yale University Press. 302 p., fine cloth, no jacket as issued. 2/23.

25 S., 1 Abb., 3 Tab., Sprache: Deutsch Gewicht in Gramm: 500.

paperback. Etat : Very Good. Virginia Highlands Festival Creative Writing Contest, c.1992, 8-1/2"x5-1/2", staple-bound wraps, 92pp., small red mark on front cover, VG $.

Proceedings of the Academy of Natural Sciences of Philadelphia 141: 115-180,13 pls 8vo, offprint.

39 pp., 9 figs, 1 tab. 8.

7 pp., gr. 8.

Coelatura Conrad, 1853 is the valid name for the genus of unionid bivalves emended to Caelatura by Simpson (1900). The family-group name Caelaturinae Modell, 1942 must be corrected to Coelaturinae Modell. Caelatura Conrad, 1865 is the valid name for the genus of barleeid gastropods renamed Actaeonema Conrad, 1865. Coelatura Pfeiffer, 1877, Coelatura von Martens, 1880, Caelatura Germain, 1921 and Ariocaelatura Germain, 1921 are objective synonyms of Plegma Gude, 1911, a genus of helixarionid gastropods. Confusion among these names has resulted from the difficulty in distinguishing between the "ae" and "oe" diphthongs when they are printed as ligatures. The ligature for "ae" in some typefaces is used as an "oe" in others. The only way to be sure of an author's intentions is to compare words of known spelling. 4 pp., 4.…

6 pp., 2 figs, gr. 8.

3 pp., gr. 8.

16 pp., 6 figs, 4.

The number of anodontine bivalve species placed in the genus Cristaria (Bivalvia, Unionidae) from the Russian Far East is still not stable among authors. Some recognize only one valid species C. plicata (Leach, 1815) while others accept two additional species, C. tuberculata Schumacher, 1817 and C. herculea (Middendorff, 1847). In the present study, these taxonomic doubts are addressed using analyses of mitochondrial DNA sequences and shell morphometry. No significant differences have been revealed by the COI DNA sequences or the main statistical morphometric indices from the three Cristaria forms. In the specimens analysed, changes in shell morphometry with age suggest that original descriptions of the different forms may be attributed solely to differences in age and sex. We consider that C. plicata, C. tuberculata and C. herculea from the Russian Far East should be considered as a single species, namely Cristaria plicata (Leach, 1815), with C. tuberculata and C. herculea as junior synonyms. The geographic range of Cristaria plicata and its conservation status are also presented here. 15 pp., 6 figs, gr. 8. …

24 pp., 3 tabs, geh. 4.

25 pp., 5 figs, 4.

This is a comprehensive accounting of the richest mussel fauna in the U.S. Alabama rivers and waterways are home to the largest and most diverse population of freshwater mussel species in the nation, roughly 60 per cent of U.S. mussel fauna. The Mobile River Basin, which drains portions of Tennessee, Georgia, and Mississippi waterways, also contains diverse mussel populations. However, many of these species have been significantly depleted in the last century due to habitat alteration (river damming, channelization, siltation), pollution, and invasive species, and many more are in imminent danger of extinction. The authors offer encyclopedic entries on each of the 178 mussel species currently identified in Alabama and the Mobile River Basin - the scientific and common names; a morphological description as well as color photographs of the shell appearance; analysis of the soft anatomy; information about ecology, biology, and conservation status; and, a color distribution map. With an extensive glossary of terms and full index, plus additional material on the archaeological record, a history of commercial uses of mussels, and the work of significant biologists studying these species, this volume is a long overdue and invaluable resource, not only for scholars of aquatic biology and zoology but also conservationists interested in the preservation of ecological diversity and protection of inland environments. Tuscaloosa. The University of Alabama Press. 15+908 pp., col. ill., hardcover 4 [upper corner of spine bumped].…