The caudal skeleton of Arambourgthurus scombrurus (Arambourg, 1967), a Paleogene oceanic surgeonfish

Five species of the genus Vinciguerria (namely † V. macarovicii, † V. praeattenuata, † V. tal- giensis, † V. obscura, and † V. merklini) were described and/or recorded from Romania. Most of the Eocene and Oligocene fossil species of this genus from the Central and Eastern Paratethys were later grouped in two genera († Sytchewskia and † Eovinciguerria), mainly due to the morphology of the caudal skeleton. A systematic revision of the vinciguerrid phosichthyids from the Oligocene deposits of Piatra-Neamt, Romania (Central Paratethys) is presented herein. Based on the character analysis and relationships of the recent phosichthyid genera, we consider the genus † Eovinciguerria to be invalid and we re-establish the validity of the genus Vinciguerria for the Oligocene species. Morphological comparisons of the original material with well- preserved specimens of † V. obscura from Liten ice (Czech Republic) and contemporary representatives allow us to recognize that † V. macarovicii is a synonym of † V. obscura. Moreover, † V. merklini recorded from the Oligocene deposits of Piatra-Neamt (Romania) represents a juvenile specimen of † V. obscura, contrary to what was previously postulated.

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Coevolution of caudal skeleton and tail feathers in birds

Journal of Morphology ◽

10.1002/jmor.20321 ◽

2014 ◽

Vol 275 (12) ◽

pp. 1431-1440 ◽

Cited By ~ 3

Author(s):

Ryan N. Felice

Keyword(s):

Caudal Skeleton

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A new characiform fish (Teleostei: Ostariophysi) from the Eocene of Tanzania

Canadian Journal of Earth Sciences ◽

10.1139/e02-108 ◽

2003 ◽

Vol 40 (4) ◽

pp. 473-481 ◽

Cited By ~ 13

Author(s):

Alison M Murray

Keyword(s):

Fossil Record ◽

New Genus ◽

Sister Group ◽

New Genus And Species ◽

African Species ◽

Caudal Skeleton ◽

Weberian Apparatus ◽

Fossil Fish

Four specimens of a small fossil fish were collected from the Eocene Mahenge site of Tanzania. The specimens, preserved as part and counterpart natural moulds, are identified, predominantly based on the structure of the caudal skeleton, as members of the Characiformes, probably the sister group to the living African Alestidae. The area just behind the skull, in the two specimens that include this area, is distorted, and therefore it is difficult to identify the bones of the Weberian apparatus, although that structure does appear to be present. The fossil record of characiforms includes few articulated skeletons, with only one other African species previously reported from much younger deposits. The new specimens from Mahenge are described here as a new genus and species, Mahengecharax carrolli.

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The Caudal Skeleton of the Zebrafish,Danio rerio, from a Phylogenetic Perspective: A Polyural Interpretation of Homologous Structures

Copeia ◽

10.1643/cg-14-105 ◽

2015 ◽

Vol 103 (4) ◽

pp. 740-750 ◽

Cited By ~ 12

Author(s):

Edward O. Wiley ◽

Allison M. Fuiten ◽

Michael H. Doosey ◽

Brian K. Lohman ◽

Christopher Merkes ◽

...

Keyword(s):

Danio Rerio ◽

Caudal Skeleton ◽

Phylogenetic Perspective

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Intraspecific variation of the caudal fin skeleton in Osteoglossum bicirrhosum Cuvier 1829 (Teleostei: Osteoglossomorpha: Osteoglossidae)

Zootaxa ◽

10.11646/zootaxa.1434.1.1 ◽

2007 ◽

Vol 1434 (1) ◽

pp. 1 ◽

Cited By ~ 3

Author(s):

MARIA EDUARDA CASTRO LEAL ◽

PAULO M. BRITO

Keyword(s):

Intraspecific Variation ◽

Morphological Variation ◽

Caudal Fin ◽

Anatomical Studies ◽

Widespread Distribution ◽

Caudal Skeleton ◽

Large Samples ◽

Variation Patterns

The caudal fin skeleton has been regarded as a major source of characters used in the evaluation of teleostean interrelationships. Despite the increasing number of papers drawing attention to the variability observed within species when large samples are considered, intraspecific variation of this complex remains poorly known for many teleostean groups, and comparative anatomical studies still often rely on a small number of specimens. Within the Osteoglossomorpha, there are few studies concerning instraspecific variation patterns, and many aspects of both the anatomy and homology of the caudal fin skeleton elements are controversial (e.g. epurals versus uroneurals; number of hypurals compounding the “hypural fan”). Given this perspective, we examined the caudal skeleton of 84 specimens of the neotropical osteoglossid fish Osteoglossum bicirrhosum, and described and quantified its morphological variation. We determined that the number of neural spines on the preural centra and hypural fusion patterns showed the greatest variation. Despite the widespread distribution of this taxon, the observed variation appears to be geographically independent, and occurs randomly within populations.

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