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Cretatriacanthidae
Taxonomy
Cretatriacanthidae was named by Tyler and Sorbini (1996).
It was assigned to Plectocretacicoidea by Tyler and Sorbini (1996), Santini and Tyler (2003).
It was assigned to Plectocretacicoidea by Tyler and Sorbini (1996), Santini and Tyler (2003).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1996 | Cretatriacanthidae Tyler and Sorbini p. 4 |
| 2003 | Cretatriacanthidae Santini and Tyler p. 603 |
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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.
Fm. †Cretatriacanthidae Tyler and Sorbini 1996
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G. †Slovenitriacanthus Tyler and Križnar 2013
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†Slovenitriacanthus saksidai Tyler and Križnar 2013
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: Hendy et al. 2009, Carroll 1988 | |||||
Age range: base of the Campanian to the top of the Early/Lower Campanian or 83.60000 to 72.20000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Santonian - Early/Lower Campanian | Slovenia (Kras) | Slovenitriacanthus saksidai (221379) | |
| Campanian - Maastrichtian | Italy (Lecce) | Cretatriacanthus guidott (140248) |