| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Baculites rex
Taxonomy
Baculites rex was named by Anderson (1958). It is a 3D body fossil. Its type locality is CAS 28325, Crow Creek, which is in a Maastrichtian marine siliciclastic in the Joaquin Formation of California.
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.
†Baculites rex Anderson 1958
show all | hide all
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| T. Matsumoto 1959 | The shell is rapidly tapering, straight Or SOmetimeS gently arcuate, growing to a large size;the largest known example slightly exceeds 60 mm. in height(i.e. longer diameter in cross section). The section is higher than
broad;the proportion of height and breadth is 10:7.3 in average but varies considerably. It is eg9-shaped, the siphonal area being much more narrowly rounded than the antisiphonal;the Hanks are gently inHated, with the maximum breadth at somewhat below mid-Hank. The surface is almost smooth, but very weak riblets and lirae are sometimes discernible. They show a deep sinus on the flank, strongly incline forward on the ventrolateral part, and then cross the venter with pronounced projection and also sometimes with increased intensity;they are very feeble on the dorsum, showing a broad convexity. An indistinct, shallow Constriction rnay be developed along the apertura1 margin. The suture is complex, very deeply incised, and ornate. The saddles are nearly symmetrically bifd. In the late growth stages their stems are narrowed by the deep incision of the lobules. L is again typically symmetric, but in some case modified;the median minor saddle at its bottom is lower than and tends to be overhung by the adjacent lateral minor saddles. L is deep and in more or Iess late growth-stages narrowed by the laterally streched branches of the saddles. U is broader and shallower than L; its branches are expanded. I is relatively larger than those of many other species of Baculites, being nearly as deep as the height of the saddles on oth sides of it. |
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|
||||
|
|
||||
| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: base of the Maastrichtian to the top of the Early/Lower Maastrichtian or 72.10000 to 66.00000 Ma
Collections (27 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Campanian | USA (California) | Baculites rex (86872 167700 167701 167703 167704) | |
| Middle Campanian | USA (California) | Baculites rex (69314 144764 168007 220412) | |
| Late/Upper Campanian - Early/Lower Maastrichtian | USA (California) | Baculites rex (44268 224995 224999 225732 225733) | |
| Late/Upper Campanian - Maastrichtian | USA (California) | Baculites rex (225631 225739 225740 225917) | |
| Maastrichtian | USA (California) | Baculites rex (86853 type locality: 86857 225708 225709 225738) | |
| Early/Lower Maastrichtian | USA (California) | Baculites rex (83776 224893 225836 225918) |