Proceedings of 3rd Workshop on Early Cretaceous Cephalopods by Cecca F. (Ed.)

By Cecca F. (Ed.)

Show description

By Cecca F. (Ed.)

Show description

Read Online or Download Proceedings of 3rd Workshop on Early Cretaceous Cephalopods PDF

Best biology books

Protein Misfolding and Cellular Stress in Disease and Aging: Concepts and Protocols

How and why sure proteins misfold and the way this misfolding is associated with many ailment methods has develop into a well-documented subject of analysis. Protein Misfolding and mobile tension in disorder and getting older: ideas and Protocols strikes past the fundamentals to stress the molecular results of protein misfolding at a mobile point, to delineate the affects and mobile reactions that play a job in pathogenetic mechanisms, and to pinpoint attainable manipulations and remedy thoughts that may counteract, alter, or hold up the implications of misfolding.

RNA 3D Structure Analysis and Prediction

With the dramatic elevate in RNA 3D constitution decision in recent times, we now recognize that RNA molecules are hugely established. furthermore, wisdom of RNA 3D buildings has confirmed an important for realizing in atomic element how they bring out their organic features. as a result large variety of most likely very important RNA molecules in biology, many greater than may be studied experimentally, we'd like theoretical techniques for predicting 3D constructions at the foundation of sequences by myself.

Additional info for Proceedings of 3rd Workshop on Early Cretaceous Cephalopods

Example text

Callidiscus zones (which correspond with the whole TV. pachydicranus zone). C O M P A N Y (1987) observed that TV. ) callidiscus occurs above the LAD of O. gaudryi in SE Spain, whilst A U T R A N (1993) figured an O. stevenini from a condensed horizon of the T. callidiscus and A. radi a tus (base of the Hauterivian) zones. 10 m in section B, I found on the surface of the bed an impression of a small neocomitid which surely belongs to the subgenus Teschenites (pl. 1, fig. 24). Due to its poor state of preservation it is difficult to reach a reliable determination; some characters of the ribbing recall TV.

The section studied is almost 30 metres thick, although it is partly covered (Fig. 3). The most fossiliferous levels are exposed from metre 30 to metre 23. In this part of the section the limestone flakes off in thin layers which often contain well preserved aptychi and crushed ammonites. S. verrucosum ( D ' O R B I G N Y ) was found in these levels between metres 29 and 24 but it has not been rediscovered during the last study. The distribution of those ammonites collected bedby-bed is shown in Fig.

It has been identified as O. sp. aff. stevenini ( N I C K L È S ) because the smooth stage persists much later than in the other species described by N I C K L È S (1892). 20 m I found a half whorl of a According to C O M P A N Y (1987), the range of N. Oosterella (pl. 20) specimen which is characterized neocomiensis spans the B. campylotoxus zone to the by a keel bordered by clear furrows and by the suture and base of the N. pachydicranus zone, whilst B U L O T (1993, the sculpture of O. 4) shows a longer range which begins at the top specimen figured by N I C K L È S (1892) pl.

Download PDF sample

Rated 4.20 of 5 – based on 44 votes