摘要:

Pachyamia latimaxillarisn. gen. et sp. from the lowermost Cenomanian Bet-Meir Formation of Judea is characterized by an enlarged and divided maxilla, an ossified element in the pectoral girdle, a single postorbital plate, wide and truncated ribs, a smooth subopercular, and the absence of supramaxilla.

ISSN:0272-4634    

DOI:10.1080/02724634.1982.10011935

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

D. sussmilchiis found to have several distinctive bones forming an otic capsule, a large quadrate and a short parasphenoid; the hyomandibula has a single attachment to the lateral otic; the spiracular recess contained a blind pit for a spiracular organ, and transmitted the internal carotid artery and branches of the facialis nerve; the efferent pseudobranchial artery joined the internal carotid just posterior to the neurocranium; the foramen prooticum basicraniale transmitted the orbital artery, the jugular vein, and the hyomandibularis VII; there is no open cavum epiptericum. The courses of the glossopharyngeal and vagus nerves, as well as various nerve commissures and the posterior cerebral vein, are reconstructed.

ISSN:0272-4634    

DOI:10.1080/02724634.1982.10011936

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

The use of Paleozoic ichthyoliths in geology has been extremely limited due, in part, to the taxonomic problems involved in their identification and the lack of adequate documentation affording comparisons of elements from various studies. Part I of a catalog of 156 Late Pennsylvanian ichthyoliths consists of diagnoses and illustrations mainly of scales and mucous membrane denticles derived from palaeoniscoid, acanthodian and chondrichthyan fishes. Each ichthyolith has been identified by a coded, utilitarian classification system. The advantage of such a system is that ichthyoliths can be more easily used to solve stratigraphic and paleoecologic problems.

ISSN:0272-4634    

DOI:10.1080/02724634.1982.10011937

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

The history of South American therapsids and archosaurs during the Early, Middle and Late Triassic is analyzed. Improvements in the locomotor apparatus are discernible in seven groups of archosaurs and indicate that a great adaptive radiation took place before the oldest recorded fauna dominated by archosaurs appeared. Competition between therapsids and archosaurs began at the outset of the Triassic, when the proterosuchids were cosmopolitan and ceased 10 m.y. before the end of the Triassic. The richDicroidiumflora and the variety of types of both therapsids and archosaurs were synchronous. The flora probably triggered the radiation in both reptilian groups. It is assumed that the extinction of therapsids was caused by: (a) the locomotor superiority of the Middle and Late Triassic archosaurs; (b) the capability of archosaurs to increase their body size during the Triassic; (c) the appearance of herbivorous archosaurs at the outset of the Late Triassic; and (d) the competitive pressure imposed by rhynchosaurs on medium-sized therapsids.

ISSN:0272-4634    

DOI:10.1080/02724634.1982.10011938

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

New fossils from the Burdigalian locality of Port-la-Nouvelle (southern France) add to our knowledge of the Hipposideridae. Four species of this family are represented, including a new species of the subgenusBrachipposiderosSigéHipposideros aguilarin.sp.).H. vetus(Lavocat) from Beni Mellal (Miocene of Morocco) andH. cf.vetusfrom Sète (late Pliocene of France), formerly attributed toAsellia, are placed in the subgenusSyndesmotisPeters, which includes the Recent East African speciesH. (S.) megalotis. The following genera and subgenera are recognized in this study: genusHipposiderosincluding the subgeneraHipposideros, Brachipposideros, SyndesmotisandPseu-dorhinolophus, and the genusAsellia. Anatomy of teeth and jaws suggests new phyletic interpretations:Pseudorhinolophuscould be ancestral toAsellia, andBrachipposiderostoSyndesmotis; PseudorhinolophusandBrachipposiderosmay both be represented in the Recent fauna by large and smallHipposideros, respectively; on the other hand,Brachipposiderosis unlikely to have originated fromPseudorhinolophus, and neither of these genera can be derived from the Paleogene European genusPalaeophyllophoraRevilliod.

ISSN:0272-4634    

DOI:10.1080/02724634.1982.10011939

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

ISSN:0272-4634    

DOI:10.1080/02724634.1982.10011940

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

ISSN:0272-4634    

DOI:10.1080/02724634.1982.10011941

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor