Rowson b (13 Ergebnisse)

Soft cover. Zustand: Very Good. 2014. Very good copy.

Zustand: New. 192, col photo, line drawings. . PB. NEW. . This guide will aid the identification and recording of over 50 species of freshwater snails (gastropod molluscs) found in Britain and Ireland. It includes species found in ponds, rivers, streams, canals, brackish water and the margins of saltmarsh and lagoons.Freshwater snails play a vital role in food webs and water purification. Some indicate unspoilt or very specialised habitats, while others host unwelcome parasites, or are nuisance invaders. Updated names are used to reflect recent taxonomic research, and new maps are used to show the changing distribution of many species. Sections on field survey and conservation, drawing on many years' experience, are included.Three different routes to identification are provided:A simple key.Comprehensive species accountsPictorial index showing typical examples.These can be used separately or together. Details are also provided on dissection and the identification of juveniles, eggs and spawn. This guide aims to make accurate identification easier for beginners and experts alike. [9781908819581].…

Soft cover. Zustand: Near Fine. 2021 Conchological society.

24 x 18. 121 Seiten. Mit Abbildungen. Hardcover. Ordnungsgemäß aus einer Universitäts-Bibliothek ausgesondert (Stempel, Signatur). Gut erhaltenes Exemplar. Sprache: Deutsch Gewicht in Gramm: 390.

Zustand: New. In English.

A new species of land-snail (Streptaxidae: Gulella) from montane forest in the Ukaguru Mountains (Tanzania) is described and attributed to subgenus Juventigulella Tattersfield on shell characters. There are shell and radular resemblances to certain other Gulella species not in subgenus Juventigulella, emphasising the need for revisionary work. This is the second endemic snail described from the Ukagurus, a recognised area of endemism but one from which few land snails have been collected. 7 pp., 8 figs, gr. 8.…

10 pp., 2 figs, gr. 8.

The family Streptaxidae in Laos is revised. Twelve species are known, mainly from limestone areas, in the genera Discartemon Pfeiffer, 1856, Perrottetia Kobelt, 1905, Haploptychius Möllendorff, 1906, and Indoartemon Forcart, 1946. Three new species, P. unidentata sp. n. and P. megadentata sp. n. from northern and central Laos, and I. diodonta sp. n. from central Laos, are described. All eight species of these three genera previously recorded from Laos are revised and discussed based on examined material from Laos, Cambodia, Vietnam and Thailand. Type material was examined and lectotypes are designated. Details of genital anatomy and radulae are provided, including the first detailed genitalia and radula descriptions from Haploptychius. Two novelties in Streptaxidae, a vaginal caecum, and the occurrence of aphallic individuals, are reported from H. pellucens (Pfeiffer, 1863). New taxa: Perrottetia unidentata n. sp., Perrottetia megadentata n. sp., Indoartemon diodonta n. sp. 31 pp., 10 figs, gr. 8. …

New and little-known terrestrial slugs are dealt with based on extensive collections made in East Africa (Kenya, Tanzania, and Uganda) 19932007. This account deals primarily with larger species from forests in the Eastern Arc Mountains of Tanzania. In Veronicellidae, Pseudoveronicella Germain, 1908 is extended to Tanzania by P. (Hoffmannia) zootoca tanzaniensis subsp. n. in the Udzungwa Mts. In Urocyclidae, Dendrolimax parensis sp. n. is described from the Pare Mts. and Leptichnoides avisexcrementis sp. n. is described from the Uluguru Mts. In Urocyclinae, Tanzalimax tattersfieldi gen. & sp. n. is described from the Usambara Mts., Tanzalimax seddonae gen. & sp. n. from the Uluguru Mts., and Udzungwalimax suminis gen. & sp. n. from the Udzungwa Mts. In addition, the ill-defined genus Atrichotoxon Simroth, 1910 is discussed and the little-known Dendrolimax leprosus Pollonera, 1906 is reported from Uganda. In Agriolimacidae, a species of Deroceras Rafinesque, 1820 is reported for the first time from southern Tanzania. The taxonomic attribution and significance of each discovery is discussed. 32 pp., 75 figs, gr. 8.…

Softcover. Zustand: sehr gut. Originalbroschur., Gr 8°, geklammert, 396 - 403 Seiten, Stempel : " ausgeschieden",sehr gut erhalten. Kein Eintrag. Reprinted from the Monthly Notices of Royal Astronomical Society, Vol. 124, No. 5, 1962. in englischer Sprache (in english).

Softcover. Zustand: sehr gut. Originalbroschur., Gr 8°, geklammert, 395 - 403 Seiten . Stempel : " ausgeschieden", sehr gut erhalten. Kein Eintrag Reprinted from the Monthly Notices of Royal Astronomical Society, Vol. 124, No. 5, 1962. in englischer Sprache (in english).

This new full-colour guide gives a fully comprehensive and up-to-date coverage of the slug fauna of Britain and Ireland. Slugs have a notorious reputation as plant pests but many species have more varied ecological roles. The British and Irish slug fauna has changed rapidly over recent years as exotic species join our native wildlife. While researching for the book the authors set out to find all 36 known UK species, they were surprised to come across several they didn't recognise. Although slug species can vary enormously in appearance, and several are difficult to identify, further work, including DNA analysis, confirmed that they were distinct species. 136 pp., num. color figs, br. gr. 8 [17.3 x 24.5].…

This guide will aid the identification and recording of over 50 species of freshwater snails (gastropod molluscs) found in Britain and Ireland. It includes species found in ponds, rivers, streams, canals, brackish water and the margins of saltmarsh and lagoons. Freshwater snails play a vital role in food webs and water purification. Some indicate unspoilt or very specialised habitats, while others host unwelcome parasites, or are nuisance invaders. Updated names are used to reflect recent taxonomic research, and new maps are used to show the changing distribution of many species. Sections on field survey and conservation, drawing on many years' experience, are included. Three different routes to identification are provided: - A simple key. - Comprehensive species accounts - Pictorial index showing typical examples. These can be used separately or together. Details are also provided on dissection and the identification of juveniles, eggs and spawn. This guide aims to make accurate identification easier for beginners and experts alike. 191 pp., num. color figs and photographs, br. gr. 8 [17 x 24 cm].…