Fisherichthys, Weems, 1999

Ebersole, Jun A., Cicimurri, David J. & Stringer, Gary L., 2019, Taxonomy and biostratigraphy of the elasmobranchs and bony fishes (Chondrichthyes and Osteichthyes) of the lower-to-middle Eocene (Ypresian to Bartonian) Claiborne Group in Alabama, USA, inclu, European Journal of Taxonomy 585, pp. 1-274: 178-180

publication ID

https://doi.org/10.5852/ejt.2019.585

publication LSID

lsid:zoobank.org:pub:181B6FBA-ED75-4BB4-84C4-FB512B794749

DOI

http://doi.org/10.5281/zenodo.3664342

persistent identifier

http://treatment.plazi.org/id/18174D41-FF34-FF1C-FDDB-9CC249B40E4F

treatment provided by

Plazi

scientific name

Fisherichthys
status

 

Fisherichthys  aff. F. folmeri Weems, 1999 

Fig. 66View Fig A–L

Fisherichthys folmeri Weems, 1999: 63  , pls 4.7d, 4.8a–b.

Albula eppsi – Case 1994b: 142  , pl. 1, figs 372–375.

cf. Fisherichthys  sp. – Clayton et al. 2013: fig. 6k–l.

Material examined

UNITED STATES OF AMERICA – Alabama • 6 isolated teeth; Claiborne Group ; MSC 38501View Materials, SC 2012.47.125 (2 specimens), SC 2012.47.237, SC 2012.47.238, SC 2012.47.239  .

Description

Small teeth measuring up to 1.5 mm diameter, 1.0 mm crown height. Tooth crown conical in profile, with flat apex. Crown covered by smooth enameloid; apical surface with shallow depression surrounded by small tubercles. Occlusal surface of worn teeth composed of dentine, with a thin outer enameloid layer. Crown base thick, with basal cingulum. Circular basal pulp cavity centrally located.

Remarks

Six specimens in our sample are tentatively assigned to Fisherichthys folmeri  because they exhibit the features of the type and only known species. The conical profile, apical tubercles, and basal cingulum serve to distinguish teeth of Fisherichthys  in our sample from the somewhat similar teeth of Albula  , Paralbula  , Pycnodus  , and Egertonia  .

The occurrence of Fisherichthys in Claiborne  Group strata, particularly in the Gosport Sand, represents the stratigraphically youngest records for the genus, which was previously not known to occur beyond Zone NP11 of the Ypresian Stage ( Case 1994b; Weems 1999; Cicimurri & Knight 2009). Our tentative species identification is due to our small sample size and much younger stratigraphic occurrence.

Stratigraphic and geographic range in Alabama

The specimens in our sample were collected from the basal Lisbon Formation at site ACov-11 and the basal Gosport Sand at site ACl-4. Lower Lutetian to middle Bartonian, zones NP15 to NP17.

Kingdom

Animalia

Phylum

Chordata

Class

Pisces (awaiting allocation)

Order

Pisces (awaiting allocation)

Family

Pisces (awaiting allocation)

Loc

Fisherichthys

Ebersole, Jun A., Cicimurri, David J. & Stringer, Gary L. 2019
2019
Loc

Fisherichthys folmeri Weems, 1999: 63

Weems R. 1999: 63
Loc

Albula eppsi – Case 1994b: 142

Case G. R. 1994: 142