Rossel c s (2 risultati)
- Altre immagini
Editore: Central Connecticut State University, Connecticut, 2004
- Brossura
- Prima edizione
Da: biblioboy, North Providence, RI, U.S.A.biblioboy
Contatta il venditoreVenditore con 5 stelleCondizione: Usato - Ottimo
EUR 13,59
EUR 6,16 spedizioneSpedito in U.S.A.Quantità: 1 disponibili
Aggiungi al carrelloSingle issue magazine. Condizione: Fine. First Edition. Central Connecticut State University. Fine. 2004. First Edition. Daniel Jewett, Deborah Rossel, Tom Hazuka, Steven Ostrowski, Aidan P. Morgan, Tom Chandler, S. Champioin, Kevin Rouleau, Ravi Shankar, Sandra Flanagan, T. Washington, C. Gallagher, John Page, raven, et al] [ab…out 6.5" x 9.5"], 104 pages, illustrated [both color and black-and-white]. Fine copy. mag11E.
- Altre immagini
Da: ConchBooks, Harxheim, GermaniaConchBooks
Contatta il venditoreVenditore con 4 stelleCondizione: Usato
EUR 5,75
EUR 24,00 spedizioneSpedito da Germania a U.S.A.Quantità: 1 disponibili
Aggiungi al carrelloUndescribed freshwater snails (Amnicolidae: Colligyrus) from the Mount Hood region (northwestern United States) identified as a new species (commonly known as the Columbia duskysnail) in grey literature have been provided federal protection under the "survey and manage" provisions of the Northwest Forest Plan and have been place…d on conservation watch lists. However, there are no published studies of the identity of these snails aside from a molecular phylogenetic analysis which delineated a close relationship between the single sampled population and C. greggi, which is distributed more than 750 km to the east of the Mount Hood area. Here we examine the taxonomic status of the Columbia duskysnail based on additional molecular sampling of mitochondrial DNA sequences (COI) and morphological evidence. We found that the Columbia duskysnail is not a monophyletic group and forms a strongly supported clade with C. greggi. The COI divergence between these broadly disjunct groups (2.1%) was somewhat larger than that within C. greggi (1.0%) but considerably less than that among the three currently recognized species of Colligyrus (8.712.1%). Additionally we found that the Columbia duskysnail and C. greggi cannot be consistently differentiated by previously reported diagnostic characters (size and shape of shell spire, pigmentation of body and penis) and are closely similar in other aspects of morphology. Based on these results we conclude that the Columbia duskysnail is conspecific with C. greggi. 13 pp., 6 figs, 4 tabs, gr. 8.
