New aristonectine elasmosaurid plesiosaur specimens from the Early Maastrichtian of Angola and comments on paedomorphism in plesiosaurs

被引：45

作者：

Araujo, R. ^{[1
,2
]}

Polcyn, M. J. ^{[2
]}

Lindgren, J. ^{[3
]}

Jacobs, L. L. ^{[2
]}

Schulp, A. S. ^{[4
,5
,6
]}

Mateus, O. ^{[1
,7
]}

Olimpio Goncalves, A. ^{[8
]}

Morais, M-L. ^{[8
]}

机构：

[1] Museu Lourinha, P-2530157 Lourinha, Portugal

[2] So Methodist Univ, Huffington Dept Earth Sci, Dallas, TX 75275 USA

[3] Lund Univ, Dept Geol, SE-22362 Lund, Sweden

[4] Nat Biodivers Ctr, NL-2300 RA Leiden, Netherlands

[5] Nat Hist Museum Maastricht, NL-6211 KJ Maastricht, Netherlands

[6] Vrije Univ Amsterdam, Fac Earth & Life Sci, NL-1081 HV Amsterdam, Netherlands

[7] Univ Nova Lisboa, GeoBioTec, Fac Ciencias & Tecnol, P-2829516 Caparica, Portugal

[8] Univ Agostinho Neto, Fac Ciencias, Dept Geol, Luanda, Angola

来源：

NETHERLANDS JOURNAL OF GEOSCIENCES-GEOLOGIE EN MIJNBOUW | 2015年 / 94卷 / 01期

关键词：

Paedomorphism; plesiosaurs; marine reptiles; Africa; Cretaceous; histology; NORTHERN PATAGONIA; REPTILIA; SAUROPTERYGIA; PACHYOSTOSIS; GENUS;

D O I：

10.1017/njg.2014.43

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

New elasmosaurid plesiosaur specimens are described from the Early Maastrichtian of Angola. Phylogenetic analyses reconstruct the Angolan taxon as an aristonectine elasmosaurid and the sister taxon of an unnamed form of similar age from New Zealand. Comparisons also indicate a close relationship with an unnamed form previously described from Patagonia. All of these specimens exhibit an ostensibly osteologically immature external morphology, but histological analysis of the Angolan material suggests an adult with paedomorphic traits. By extension, the similarity of the Angolan, New Zealand and Patagonian material indicates that these specimens represent a widespread paedomorphic yet unnamed taxon.

引用

页码：93 / 108

页数：16

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