Biology:Gracilineustes
Gracilineustes is an extinct genus of marine crocodyliform that lived in the oceans during the Middle to Late Jurassic. Gracilineustes was a carnivore that spent much, if not all, its life out at sea. It was a small reptile, with G. leedsi measuring 2.25–3.11 m (7.4–10.2 ft) long and G. acutus measuring 3.77 m (12.4 ft) long.[1]
Discovery and species
Fossil specimens referrable to Gracilineustes are known from Middle-Late Jurassic deposits of England and France.[2]
Valid species
- G. leedsi: Western Europe (England) of the Middle Jurassic (Callovian);[3] Metriorhynchus laeve is a junior synonym.
- G. acutus: Western Europe (France) of the Late Jurassic (Kimmeridgian) [4]
Classification
Gracilineustes is an early member of the metriorhynchid subfamily Metriorhynchinae. The cladogram below is from an analysis by Mark Young and colleagues in 2020.[5]
| Metriorhynchinae |
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References
- ↑ Young, M.T.; Bell, M.A.; de Andrade, M.B.; Brusatte, S.L. (2011). "Body size estimation and evolution in metriorhynchid crocodylomorphs: implications for species diversification and niche partitioning". Zoological Journal of the Linnean Society 163 (4): 1199–1216. doi:10.1111/j.1096-3642.2011.00734.x.
- ↑ Young, Mark T., Brusatte, Stephen L., Ruta, M., Andrade, Marco B. 2009. "The evolution of Metriorhynchoidea (Mesoeucrocodylia, Thalattosuchia): an integrated approach using geometrics morphometrics, analysis of disparity and biomechanics". Zoological Journal of the Linnean Society 158: 801-859.
- ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedAndrews, 1913 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedLennier, 1887 - ↑ Young, M. T.; Brignon, A.; Sachs, S.; Hornung, J. J.; Foffa, D.; Kitson, J. J .N.; Johnson, M. M.; Steel, L. (2020). "Cutting the Gordian knot: a historical and taxonomic revision of the Jurassic crocodylomorph Metriorhynchus". Zoological Journal of the Linnean Society 192 (2): 510–553. doi:10.1093/zoolinnean/zlaa092.
Template:Thalattosuchia Wikidata ☰ Q609756 entry
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