摘要:

The fossil hyaenids from Langebaanweg in South Africa are revised taxonomically using both morphological comparisons and measurement data.Ictilherium preforfexis found to be a synonym ofIkelohyaena abronia. Other hyaenid taxa in this fauna are Hyaenictitherium namaquensis, Chasmaporthetes australis and a new taxon similar toChasmaporthetes australisin the size and shape of the M1, trigonid and other characters, but differing from this taxon in having short P3relative to P2, a smaller anterior accessory cusp on P4and M2, present. This taxon has previously been referred toEuryboassp***, but comparison with Eurasian hyaenids indicates that it shares diagnostic characters withHyaenictis graeca, type species of the genusHyaenictis. This genus is poorly known and its content is reviewed. We find that only the new species from Langebaanweg, formally described asHyaenictis hendeyi sp. nov., and the SpanishHyaenictis almeraiprobably belong in this genus, while other taxa intermittently referred toHyaenictisbelong to other genera. Thus, neitherLeecyaena boseinorChasmaporthetes silberbergibelong inHyaenictis.

ISSN:0024-4082    

DOI:10.1111/j.1096-3642.1994.tb01483.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Seven species of the genusBelgrandiellaA. J. Wagner, 1928 (sensu lato), from Austria and Italy are described in detail. The genusGrazianaRadoman, 1975, is redefined on a newly discovered character of the stomach, the shield caecum. This is remarkable, since hydrobiid genera are usually defined by characters of the reproductive system. Two species,B. pelereisp. nov.andG. klagenfurtensissp. nov., are new to science. Allozyme electrophoresis of ten populations of these seven species revealed an unusual lack of variability within each population. This is explained as a consequence of the presumed mode of dispersal of these crenobiontic snails, i.e. aerial transport with insects. Genetic distances between conspecific populations and congeneric species fall within the expected range. The only exception is the genetic identity ofG. klagenfurtensisandG. lacheineriKüster, 1853. This identity is probably due to the recent origin ofG. klagenfurtensis, whose area was covered with ice during the Wtirm glaciation. The high distance values betweenBelgrandiellaandGrazianajustify the generic separation based on a character of the digestive system. This is also confirmed through the comparison with three species of the genusHydrobiaHartmann, 1821, which differs in all systematically relevant aspects from the other two genera

ISSN:0024-4082    

DOI:10.1111/j.1096-3642.1994.tb01484.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

A reinvestigation of the osteology of the holotype ofDrepanosaurus unguicaudatusPinna, 1980 suggests that in earlier descriptions some osteological features were misinterpreted, owing to the crushing of the bones and because taphonomic aspects were not considered. The pattern of the shoulder girdle and fore–limb was misunderstood: the supposed interclavicle is in fact the right scapula, and the bones previously identified as coracoid and scapula belong to the anterior limb. The new reconstruction of the shoulder girdle, along with the morphology of the phalanges and caudal vertebrae, leads to a new hypothesis about the mode of life of this reptile.Drepanosauruswas probably an arboreal reptile which used its enormous claws to scrape the bark from trees, perhaps in search of insects, just as the modern pigmy anteater (Cyclopes) does. Available diagnostic characters placeDrepanosauruswithin the Neodiapsida Benton, but it is impossible to ascribe this genus to one or other of the two major neodiapsid lineages, the Archosauromorpha and the Lepidosauromorph

ISSN:0024-4082    

DOI:10.1111/j.1096-3642.1994.tb01485.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Illustrated keys to males and females of the 13 known species of the Indo‐Australian braconine genusMacrobraconSzépligeti are provided. Principal components analysis has been conducted to aid in the recognition. All known species are redescribed. Two new species are described:M. flavusfrom Malaysia and Indonesia andM. unicolorfrom Taiw

ISSN:0024-4082    

DOI:10.1111/j.1096-3642.1994.tb01486.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY