| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Discussion
LSID. urn:lsid:zoobank.org:act:4C7AE962-BB9F-47A4-B5A1-39D6490EB416
Derivation of name. The species name pays tribute to our late colleague and friend, Gilles Merzeraud (19652020), who established the stratigraphical section of Rio Guatemala from which the fossils described here originate.
Taxonomy
Caribeomys merzeraudi was named by Marivaux et al. (2021). Its type specimen is LACM 162449, a tooth (right lower molar (m1 or m2)), and it is a 3D body fossil. Its type locality is LACM Loc. 8060, Río Guatemala, which is in an Oligocene lagoonal conglomerate in the San Sebastian Formation of Puerto Rico. It is the type species of Caribeomys.
Synonymy list
| Year | Name and author |
|---|---|
| 2021 | Caribeomys merzeraudi Marivaux et al. figs. Figs 2A, 4 |
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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.
†Caribeomys merzeraudi Marivaux et al. 2021
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. Marivaux et al. 2021 | Small geomyin species (c. 100 g) with mesodont teeth displaying an unusually thick enamel layer. Differs from other Geomyina (i.e. Heliscomyidae, Florentiamyidae, Geomyoidea incertae sedis, Heteromyidae and Geomyidae) in having lower teeth with the buccal protostylid and hypostylid linked to the protoconid (or metalophid) and hypoconid (or hypolophid), respectively. Differs from Heliscomyidae (most species of Heliscomys) in having teeth much less brachydont and bunodont, without well-differentiated main cuspids and buccal stylids. Differs from Florentiamyidae (e.g. Kirkomys, Florentiamys), some species of Heteromyidae (e.g. Eochaeotodipus, Perognathus) and all Geomyidae in having welldefined and buccolingually extended anterocingulid and posterocingulid. Differs from some other low-crowned heteromyids (such as Proheteromys) and some stem geomyoids (e.g. Proharrymys) in having lingual and buccal cuspids that, when merged (with wear), form transverse metalophid and hypolophid, not Vshaped lophids. Differs from most geomyids and high-crowned heteromyids in having teeth much more low-crowed and mesodont (not hypsodont or hypselodont). |
Measurements
No measurements are available
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| Source: o = order, subc = subclass, c = class, subp = subphylum | |||||
| References: Lillegraven 1979, Nowak 1999, Carroll 1988, Ji et al. 2002, Hendy et al. 2009 | |||||
Age range: Late/Upper Oligocene or 28.40000 to 23.03000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Oligocene | Puerto Rico | Caribeomys merzeraudi (type locality: 155752) |