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Cretatriacanthus guidottii
Taxonomy
Cretatriacanthus guidottii was named by Tyler and Sorbini (1996). Its type specimen is MCSVN 1377, a skeleton, and it is a 3D body fossil.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1996 | Cretatriacanthus guidottii Tyler and Sorbini p. 5 figs. Figs. 1-8 |
| 2005 | Cretatriacanthus guidottii Tyler and Santini p. 162 |
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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.
†Cretatriacanthus guidottii Tyler and Sorbini 1996
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. C. Tyler and L. Sorbini 1996 | Plectocretacicoids with a prominent, anteriorly positioned spiny dorsal fin of about six spines interpreted as a rudimentary first spine, a second spine of great length (-50% SL), and other spines decreasing in length to probably a very short last element; about 10 dorsal-fin rays (anal fin unknown); pelvic fin with a stout spine of great length (47% SL) and two rudimentary rays; pelvic fin positioned thoracically below pectoral-fin base alongside middle region of pelvis; pelvic-fin spine without a basal-flange locking mecha- nism; posterior process of pelvis long and shaft-like, not much expanded anteriorly between pelvic-fin spines; 12 principal caudal-fin rays; probably only one epural; probably 21 vertebrae; neural and haemal spines of posterior caudal vertebrae relatively well developed; premaxilla with a long ascending process, without serrations along outer edge at angle of ascending and alveolar processes; maxilla long, with a prominent posterodorsally oriented process articulating with ascending process of premaxilla; subocular shelf formed by second through fourth infraorbitals, with most of shelf formed from second infraorbital; postcleithrum enormously expanded; body scaleless except for a few slightly enlarged hexagonal scale plates on top of rear of head; head bones without tubercles. |
Measurements
No measurements are available
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| Source: o = order, subp = subphylum | |||||
| References: Carroll 1988, Hendy et al. 2009 | |||||
Collections
No collection or age range data are available