Rol n e (72 résultats)

Paperback. Etat : Very Good. Thank you for supporting Last Word Books and independent bookstores. Trade paperback. Good. Minor shelf wear to covers/pages. Clean, tight binding. Thank you for supporting Last Word Books and independent bookstores.

Paperback. Etat : As New. This book is like new; no remainder marks. It does have some shelfwear. Inside pages are clean. ; 10.79 X 8.19 X 0.39 inches; 64 pages.

Square 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 costs.…

New taxon: Brocchinia canariensis n. sp. 7 pp., 13 figs, br. gr. 8.

5 pp., 10 figs, br. gr. 8.

After some land observations, it is recorded that the gastropod Iselica anomala is a parasitic of the bivalve Atrina rigida. 5 pp., 5 figs, br. gr. 8.

2 pp., 5 figs, br. gr. 8.

The species of the genus Assiminea from the occidental African coast are studied, and comparisons with those previously known are presented. In the absence of definitive proof. it is assumed that Assiminea hessei O. Boettger, 1887 is applicable to the Angolan populations. Five new species are described. New taxa: Assiminea principensis n. sp., Assiminea saotomensis n. sp., Assiminea occulta n. sp., Assiminea senegalensis n. sp., Assiminea moroccoensis n. sp. 19 pp., 11 figs, 4.…

12 pp., 34 figs, 4.

New taxa: Miralda temperata n. sp., Miralda superba n. sp. 8 pp., 7 figs, 8.

New taxon: Lirularia antoniae spec. nov. 7 pp., 9 figs, 8.

Columbella minor Scacchi, 1836 is revised in the genus Mitrella Risso, 1826, on the basis of its original description and figure, and of the study of shell material from Mediterranean and the nearby Atlantic. A neotype of C. minor is designated. C. minor takes priority on the older name Mangelia vitrea Risso, 1826 on the basis of the article 23.9 of the Code of Zoological Nomenclature. The variability of the shell morphology, of the shell decoration and of the animal chromatism is discussed. A sibling species ranging from Alboran Island to Northern Senegal is described as Mitrella hernandezi sp. nov. Its principal diagnostic features lie in a large white pupoid protoconch instead of a small brown pointed one in M. minor, and in a thin lattice-patterned periostracum instead of a thick coarsely wrinckled on in M. minor. 15 pp., 43 figs, gr. 8.…

The species of Metaxia Monterosato, 1844 found in Cuba are shown. The shell and the protoconch of each one are described and figured. M. taeniolata Dall, 1889 is considered a valid species. Also it is described a new species: M. espinosai n. sp. 8 pp., 10 figs, gr. 8.

A new species in the genus Lodderena (Gastropoda: Skeneidae), Lodderena bunnelli n. sp., is described from Abaco (Bahamas). The new species is compared to L. ornata (Olsson & McGinty, 1958). 6 pp., 12 figs, gr. 8.

A new species, Onoba nunezi spec. nov., probably endemic of the Canary Islands is described. It is compared with other species of the genus and with Manzonia vigoensis, which is rather similar and with which was previously confused. At the same time a shell of Manzonia vigoensis from the Canary Islands is shown. Some remarks on this species and its geographical range and distribution are given. 7 pp., 12 figs, gr. 8.…

12 pp., 5 col. pls, stapled 4.

Two new species of Nassariidae (Gastropoda: Buccinacea) from West Africa are described, figured, and compared with the most similar one. Adinopsis skoogi Odhner, 1923, with some comments on this species. Adinopsis being an invalid genus name is replaced by Adinassa n. nom., in which the new species are placed. New taxa: Adinassa barcai n. sp., Adinassa parrulai n. sp. 10 pp., 3 color plates, 4.…

The second species of the genus Plagyostila is described. It was found in Dakar, Senegal. Comparison of the shell characters of the new species with those of the type species Plagyostila asturiana are made. New taxon: Plagyostila senegalensis n. sp. 4 pp., 5 figs, gr. 8.

Galician exposed shore populations of the direct developing periwinkle Littorina saxatilis are strikingly polymorphic, with an ornamented and banded upper shore form and a smooth and unbanded lower shore form. Intermediates between the two pure forms occur in a narrow mid shore zone together with the parental forms. We have previously shown that the two pure forms share the same gene pool but that mating between them is non-random. This is due to a non-random microdistribution in the zone of overlap, and also to assortative mating. In this study we present data which show that intermediate (hybrid) females mate less often than pure females in micropatches dominated by either of the pure forms, but not in micropatches in which the two pure forms are equally common. Thus, sexual fitness in intermediate females depends on the frequency of both pure morphs. Furthermore, sexual selection against intermediate females also varies with the densities of snails within each micro patch. The biological mechanisms which may explain this particular reduction of female hybrid fitness are discussed. Assortative mating between the pure morphs is sometimes almost complete, while both morphs do not mate the intermediates assortatively. In the light of this, sexual selection against intermediate females may contribute considerably to restrict gene flow between the pure forms. 6 pp., 2 tabs, 4.…

2 pp. + 1 pl. gr. 8.

New taxon: Muricopsis hernandezi n. sp. 4 pp., 14 figs, 4.

New taxa: Iniforis gudeliae n. sp., Iniforis pelorcei n. sp. 6 pp., 29 figs, 4.

New taxa: Moerchia perforata n. sp., Moerchia deformata n. sp. 9 pp., 5 figs, 4.

New taxon: Bostrycapulus heteropoma n. sp. 7 pp., 5 figs, 4.

New taxon: Drillia (Clathrodrillia) chaaci n. sp. 5 pp., 6 figs, gr. 8.

Some species of marine micromolluscs of the families Rissoidae, Cingulopsidae, Barleeidae, and Tjaemoeiidae from West Africa (Mauritania and Senegal) are studied. New information on the following taxa is reported: Setia nomeae, Eatonina matildae, Barleeia minuscula (which is considered a valid species) and Tjaernoeia exquisita. Four new species belonging to the genera Setia (1), Crisilla (1) and Eatonina (2) are described. New taxa: Setia impolite n. sp., Crisilla senegalensis n. sp., Eatonina fuscoelongata n. sp., Eatonina ordofasciarum n. sp. 11 pp., 50 figs, gr. 8.…

A new species of the genus Vitrinella, Vitrinella kaykayae spec. nov., from Concepci?n, Chile, is described. It represents the first record of a species of this genus for that coast. The new species is compared with other species morphologically similar. 6 pp., 7 figs, gr. 8.

New taxon: Eatonina martae n. sp. 6 pp., 4 figs, gr. 8.

A new species of Cerithiopsis, Cerithiopsis krisbergi sp. nov., from Florida, USA, is described. The new species is compared with others of brown color previously known from the Caribbean Sea. Shell, protoconch, radula and operculum are figured. 5 pp., 14 figs, gr. 8.

A new species of Dizoniopsis, Dizoniopsis apexclarus sp. nov., from Principe, Sao Tom? and Annobon is described showing differences with other similar species. 4 pp., 10 figs, gr. 8.