| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Stramentum elegans
Taxonomy
Stramentum elegans was named by Hattin (1977). Its type specimen is KU 111520, an other, and it is a 3D body fossil. Its type locality is Cut bank on Smoky Hill River, 13.5 miles SW of Hays, which is in a Turonian carbonate chalk in the Carlile Shale Formation of Kansas.
Synonymy list
Is something missing? Join the Paleobiology Database and enter the data
|
|
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.
†Stramentum elegans Hattin 1977
show all | hide all
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. E. Hattin 1977 | Capitulum and peduncle typical
for family, comprising 10 plates and 8 columns, respectively. Scutum markedly trapezoidal, with generally well-developed rostral slip and with upper lateral margin and rostral part of occludent margin forming nearly right angles with base in adults. Scutal umbo lies at pronounced angulation of occludent margin, and lies approximately one-half distance from scutal apex to rostral angle. Occludent margin of capitulum strongly inflected in adults, less inflected to straight in juveniles; occludent margins of scutum and tergum meet to form angle ranging from 120? to 180?, averaging approximately 150? for specimens measured. Height of peduncle ranges from 1.8 to 2.8 times height of capitulum at carinal margin, averaging 2.4 (Table 2). Peduncle widest at its summit, with gently convex rostral and carinal margins. Plates in paired columns of peduncle approximately twice as wide as high, commonly less. |