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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Alencasterites
Taxonomy
Alencasterites was named by Pons et al. (2016).
It was assigned to Radiolitidae by Pons et al. (2016).
It was assigned to Radiolitidae by Pons et al. (2016).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2016 | Alencasterites Pons et al. p. 225 |
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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.
G. †Alencasterites Pons et al. 2016
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†Alencasterites mooretownensis Trechmann 1924
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J.M. Pons et al. 2016 | Long, slender, cylindrical radiolitid, bearing 10–15 narrow ribs separated by wide and shallow furrows at the outer shell surface. The outer shell layer of the RV is very thin and the growth lamellae are deeply inclined inward and radially folded. Down-and-outward folds produce the narrow ribs and up-and-inward folds produce the wide furrows at the outer shell surface. A radial-ridge structure is developed at its inner part and a compact structure develops outwardly. Compact structure is dominant at up-and-inward folds, or can be nearly exclusive elsewhere in very thin-shelled individuals. Radial structures are two flat-ending, up-and-inward folds, producing two depressed radial bands at the outer shell surface separated by two ribs and one furrow as in those of the rest of the shell. In very young specimens growing attached one to the other, the outer shell surface can be nearly smooth with radial bands slightly prominent. More or less spaced, concave tabulae occupy the inner shell cavity. The LV has a flat center and a concave margin. A ligamental ridge is absent. |
Measurements
No measurements are available
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| Source: f = family, o = order, c = class | |||||
| References: Kiessling 2004, Aberhan et al. 2004, Kiessling 2003 | |||||
Age range: base of the Middle Campanian to the top of the Maastrichtian or 83.60000 to 66.00000 Ma
Collections (12 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Campanian | Costa Rica (Guanacaste) | A. mooretownensis (221364 221367) | |
| Late/Upper Campanian | Jamaica | Biradiolites mooretownensis (198683) | |
| Middle Campanian | Mexico (Chiapas) | A. mooretownensis (221358) | |
| Campanian - Maastrichtian | Marshall Islands | Distefanella mooretownensis (74534) | |
| Maastrichtian | Jamaica (Portland) | Biradiolites mooretownensis (84789) | |
| Maastrichtian | North Atlantic | Distefanella mooretownensis (1374) | |
| Maastrichtian | Jamaica (Clarendon) | Biradiolites mooretownensis (84791 84792) | |
| Maastrichtian | Jamaica (Clarendon Parish) | Biradiolites mooretownensis (163009 163014 163028) |