摘要:

Detailed anatomical study of the soluteGirvanicystis batherifrom the Girvan starfish bed (Ashgill) has enabled the oral partition, hydropore, gonopore and the possible opening of a branchial slit to be identified. The distal part of the alimentary tract and the stomach were located in the posterior part of the head. Structures preserved assteinkernenare interpreted as a brain and left cranial nerve. The gross anatomy ofG. batherisupports the hypothesis that it was a suspension feeder.Girvanicystis batheriis characterized by large plates on the dorsal surface of the head, 20 rings of the feeding arm and a nodular median plate on the ventral surface of the head. A new species ofGirvanicystis, G. casteri, is described from the Sholeshook limestone (Ashgill) of South Wales.Girvanicystis casteriis distinguished fromG. batheriin that the former has narrower head, a longer feeding arm and a spine on the median plate of the ventral surface of the head.Girvanicystis batherihas characters in common with the cornuteCeratocystis perneri, namely large plates of the skeleton of the head, right and left marginal flanges, opposite dorsal fore tail plates and alternate ventral fore tail plates, which suggest thatG. batherimay also be a stem chordate.

ISSN:0024-4082    

DOI:10.1111/j.1096-3642.1992.tb01233.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

The five species of the chrysogorgiid genusSimpsonellaStiasny, 1940, are described from recently collected material this includes the description of a new species from south‐eastern Africa. The genus is presently known onlv from the western margin of the Indian Ocean, along the east African coast of Tanzania and South Africa. The nameSimpsonellais here chosen as the valid generic name by subsequent designation. The genus differs from most other genera in the family Chrysogorgiidae by the possession of sclerites with scalloped margins and/or strong tubcreulations and foliations, together with a crowded and mostly multiserial arrangement of the polyp

ISSN:0024-4082    

DOI:10.1111/j.1096-3642.1992.tb01234.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

Until recently, only three species of Lithobiomorpha,Lithobius pilicornisNewport,L. lusitanmVerhoeff andLamyctes fulvicornisMeinert were known from the Azores, and all could be plausibly considered as recent human introductions from western Europe. During expeditions in 1987 and 1989, investigating the fauna of caves and lava flows in the Azores, systematic sampling of invertebrates was undertaken on seven of the nine main islands in the archipelago. This led to the collection of three additional forms of centipede, two of which are considered as endemic and respectively cavernicolous and lavicolous subspecies of a widespread western Mediterranean species,Lithobius obscurusMeinert. The third represents an endemic subspecies of a different continental species,L. melanopsNewport. Full descriptions of all three forms are provided. It is suggested that these two species colonized the Azorean archipelago naturally, and that the cave and lava‐dwelling subspecies ofL. obscurusbecame differentiatedin situ. Lithobius pilicornismay also have reached the archipelago naturally, but introduction by humans cannot be discounted. Niche relationships of the lithobiomorphs of the archipelago are considered, and the biogeographie and evolutionary history of the group in the Azores is discusse

ISSN:0024-4082    

DOI:10.1111/j.1096-3642.1992.tb01235.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

Book reviewed in this article:Body Size in Mammalian Paleobiology, edited by J. Damuth and B.J. MacFadden.A Complete Checklist of the Birds of the World (2nd edition), by R. Howard and A. Moore.Handbook of Australian, New Zealand and Antarctic Birds (Vol. 1, Parts A&B), edited by S. Marchant and P.J. HigginsBird Population Studies, edited by C. M. Perrins, J.‐D. Lebreton and G. J. M. Hirons.Insects, Plants and Microclimate, by D. M. Unwin and S. A. CorbetThe Butterflies of Britain and Ireland, by J. Thomas and R. LewingtonMajor Evolutionary Radiations, edited by P. D. Taylor and G. P. Larwood.Horns, Pronghorns, and Antlers: Evolution, Morphology, Physiology and Social Significance, edited by George A. Bubenik and Anthony B. Bubenik.The Chrysidid Wasps of the World, by L. S. Kimsey and R. M. Bohart.Kin Recognition, edited by P. G. HepperThe Moths and Butterflies of Great Britain and Ireland, Volume 7, Part 2 (Lasiocampidae—Thyatiridae), edited by A. Maitland Emmet and J. Heath. ColchesterThe Biology of Chaetognaths, edited by Q_. Bone, H. Kapp and A. C. Pierrot‐BultsA Theory of Human and Primate Evolution, by C. P. Groves.Olduvai Gorge Vol. 4, by P. V. T

ISSN:0024-4082    

DOI:10.1111/j.1096-3642.1992.tb01236.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY