摘要:

This paper completes an analysis and evaluation of the present status of the nominal species in the gastropod genusConusdescribed during the 18th century. The major source of new names during the period 1793–1800 was theMuseum Boltenianum, in which P. F. Roding proposed99new species‐group names. Review of all pertinent evidence in the form of original descriptions and cited references leads to the conclusion that only three of these(C. biliosus, C. chaldaeusand Cleopardus)are valid, while 80 are junior synonyms of previously described species, and 16 arenomina dubia.In addition, 22 names are junior homonyms.One holotype, lectotypes of 3 species, representatives of lectotypes of 66 species, and one representative of a holotype have been designated. With the exception of 11 types of objective junior synonyms, these are illustrated in photographs.The only other nominal species ofConusproposed during the period were three from the Mediterranean Sea described by von Salis Marschlins in 1793. All of these are concluded to be junior synonyms ofC. ventricosusGmelin 1

ISSN:0024-4082    

DOI:10.1111/j.1096-3642.1975.tb00816.x

出版商:Blackwell Publishing Ltd    

年代:1975

数据来源: WILEY

摘要:

The specific ancestry and nature of the relationships of modern amphibians have not yet been established. Detailed comparisons of the anatomy of the skull roof, palate and braincase of living apodans and the Paleozoic microsaurGoniorhynchusdemonstrate greater similarities than between apodans and any other group of amphibians, fossil or recent. Unlike any other amphibians, extensive pleurosphenoid ossifications are developed in the area of the Vth nerve, uniting the otic capsule with the sphenethmoid. Other important features that they share (although not uniquely) include the presence of all the primitive dermal elements of the palate, a solidly roofed temporal region, a row of palatal teeth parallel to the marginal dentition and a row of teeth on the medial surface of the lower jaw. The stapes has a similar configuration and position, totally different from that of frogs and salamanders. Such similarities do not necessarily prove close relationship, but indicate the necessity for considering that apodans may have an ancestry distinct from that of frogs and salamanders.

ISSN:0024-4082    

DOI:10.1111/j.1096-3642.1975.tb00817.x

出版商:Blackwell Publishing Ltd    

年代:1975

数据来源: WILEY