摘要:

The genusCtemogenyswas originally described as a lizard on the basis of isolated jaw fragments from the Upper Jurassic deposits of Como Bluff, Wyoming. The discovery of new material from a Middle Jurassic locality at Kirtlington, Oxfordshire, showed thatCteniogenyswas not a lizard, but an early choristodere. The skull is represented by a collection of isolated bones, associated on the basis of fit and dermal sculpture pattern. The bones are here described and compared with those of the Late Cretaceous and Palaeocene choristoderesChampsosaurusandSimoedosaurus.Allowing for the much smaller size of the Middle Jurassic form, there is a close correspondence between the isolated bones of the three genera. Comparison with known choristoderes, based on an analysis of 53 derived character states, suggests thatCtemogenysis the most primitive of known genera. In general, the character states shared by all choristoderes support recent analyses which conclude that choristoderes arc derived from archosauromorph diapsids, not lepidosauromorphs as once thought. At Kirtlington,Cteniogenysforms part of a diverse microvertebrate assemblage including amiids, sharks, frogs, salamanders, lizards, mammals, crocodiles, pterosaurs, turtles and small dinosaurs.

ISSN:0024-4082    

DOI:10.1111/j.1096-3642.1990.tb00561.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

The benthic deep‐sea class Sorberacea (Tunicata) is revised. All known species are redescribed and figured and seven new species are added. Diagnoses of the generaSorbera, Gasterascidia, OligotremaandHexadactylusare given. The new generic nameHexadactylusreplacesHexacrobylmand a tabular key to the 12 species is provided. Hypotheses about the evolutionary processes in the Sorberacea are proposed and a comparison with Ascidiacea is given. The geographical distribution of sorberacean species and biogeographical affinities are discussed. The bathymetric distribution is particularly large since this class is characteristic of deep‐sea bott

ISSN:0024-4082    

DOI:10.1111/j.1096-3642.1990.tb00562.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

The Allometry of Growth and Reproduction, by M. J. Reiss.The Birds of Egypt, edited by S. M. Goodman and P. L. Meininger.Comparative Physiology of the Vertebrate Digestive System, by C. E. Stevens.Techniques in Comparative Respiratory Physiology, edited by C. R. Bridges and P. J. Butler.Common Insect Pests of Stored Food Products. A Guide to their Identification, Economic Series No. 15, 7th Edition, edited by L. Mound.The Moths and Butterflies of Great Britain and Ireland, Vol. 7 part 1, The Butterflies, edited by A. M. Emmet and O. Heath.Breeding Butterflies and Moths, by Ekkehard Friedrich. Colchester, Essex: Harley Books, 1986. 176 pp., B/W line drawings.Animals of the Surface Film, by Marjorie Guthrie with illustrations and plates (4‐coloured) by Peter Hayward.Ladybirds. Naturalists' Handbook No. 10, by M. Majerus and P. Kearns. Slough: Richmond Publishing Co., 1989.Grzimek's Encyclopaedia of Mammals, Vols 2 and 3. New York: McGraw‐Hill Publishing Company.Les éléments accessories de fare hyoidien des poissons téléoslomes Acanthodiens et Osteichthyens) fossiles et actuels, by Monette Veran. 1988.Electrophoretic Studies on Agricultural Pests, by Hugh D. Loxdale and J. Den Ho

ISSN:0024-4082    

DOI:10.1111/j.1096-3642.1990.tb00563.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY