Elopothrissus, SCHWARZHANS, 1981

Stringer, Gary L. & Sloan, James Carson, 2023, First Cretaceous teleostean otolith assemblage (Arkadelphia Formation, upper Maastrichtian) from Arkansas, USA, early Gadiformes, and the Western Interior Seaway, PaleoBios 40 (1994), pp. 1-39 : 8-9

publication ID

https://doi.org/ 10.5070/P940361192.

publication LSID

lsid:zoobank.org:pub:3B70D32F-9BF0-4595-AF4B-45ADEE03B204

DOI

https://doi.org/10.5281/zenodo.11474174

persistent identifier

https://treatment.plazi.org/id/2B4F878B-2569-FF90-FC0A-F96AFEC9FC44

treatment provided by

Felipe

scientific name

Elopothrissus
status

 

ELOPOTHRISSUS SCHWARZHANS, 1981

ELOPOTHRISSUS SP.

FIG. 5C View Figure 5

Material— one specimen, DMNH 2021-09- 03 About DMNH . About DMNH

Description and Remarks— The one elongate specimen assigned to Elopothrissus has a prominent sulcus clearly divided into an oval ostium opening anteriorly and anterodorsally, and a narrower, longer more excavated cauda. However, as noted in Schwarzhans and Stringer (2020a) there are significant changes in the H/L ratios with ontogenetic changes in size, which is caused primarily by an increase in the length of the rostrum. There is a slight postdorsal angle as well as some faint marginal crenulation. Like with many other pterothrissids, morphological maturity is only reached when specimens are more than 5 mm long, hence, smaller specimens should not be used for species definition ( Schwarzhans 2012). For this reason, DMNH 2021-09-03, which is only 1.83 mm long, is identified only to genus.

Elopothrissus carsonsloani Schwarzhans and Stringer (2020a) was reported from the Danian Clayton Formation but not the Maastrichtian Kemp Clay ( Schwarzhans and Stringer 2020a). An unidentified species of Elopothrissus was noted by Schwarzhans et al. (2018b) from the Santonian of Alabama. The genus represents an extinct pterothrissid that extends across the K-Pg extinction event and well into the Paleogene ( Schwarzhans and Stringer 2020a).

DMNH

Delaware Museum of Natural History

Kingdom

Animalia

Phylum

Chordata

Order

Albuliformes

Family

Albulidae

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