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Gracilineustes
Taxonomy
Gracilineustes was named by Young et al. (2010).
It was assigned to Thalattosuchia by Bronzati et al. (2012); to Metriorhynchidae by Young et al. (2013); and to Metriorhynchinae by Young et al. (2010), Cau and Fanti (2011), Young (2013) and Parrilla-Bel and Canudo (2015).
It was assigned to Thalattosuchia by Bronzati et al. (2012); to Metriorhynchidae by Young et al. (2013); and to Metriorhynchinae by Young et al. (2010), Cau and Fanti (2011), Young (2013) and Parrilla-Bel and Canudo (2015).
Synonymy list
| Year | Name and author |
|---|---|
| 2010 | Gracilineustes Young et al. p. 850 |
| 2011 | Gracilineustes Cau and Fanti p. 558 fig. 6 |
| 2012 | Gracilineustes Bronzati et al. |
| 2013 | Gracilineustes Young fig. 6 |
| 2013 | Gracilineustes Young et al. |
| 2015 | Gracilineustes Parrilla-Bel and Canudo |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. T. Young et al. 2010 | Metriorhynchid thalattosuchian with over 28 teeth per maxilla, and more than 20 teeth per dentary; lacking conspicuous ornamentation on the cranial bones; the antorbital fossa is elongate, narrow, and oriented obliquely, and is enclosed by the lacrimal, maxilla, and jugal; the antorbital pseudofenestra is enclosed by the lacrimal, nasal, and maxilla; the internal nares opens out posteriorly into the buccal cavity, with the palatines creating a broad U-shape, directed anteriorly; the maxilla–palatine suture forms an M-shape, orientated posteriorly; the squamosal contributes less than 50% to the supratemporal arch; the squamosal projects further caudally than the occipital condyle; the mandibular symphysis depth is ~4% of the total mandible length; the length of the cervical centrum is shorter than its height; the tibia is roughly one third of the length of the femur; the atlas hypocentrum is subequal in length to the odontoid process length; the humerus is smaller in length than the scapula; the ischium anterior process lacks either articulation facet. |
Measurements
No measurements are available
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| Source: subo = suborder | |||||
| Reference: Kiessling 2004 | |||||
Age range: base of the Middle Callovian to the top of the Early/Lower Kimmeridgian or 164.70000 to 150.80000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Callovian | United Kingdom (England) | Metriorhynchus laeve, Metriorhynchus leedsi (109800) | |
| Early/Lower Kimmeridgian | France (Lower Normandy) | G. acutus (153672) |