Schizoria cf. intermedia Cooper, 1989
publication ID |
https://doi.org/ 10.4202/app.2010.0092 |
persistent identifier |
https://treatment.plazi.org/id/0380D832-FFF2-D367-F87B-FA8C1CB3071B |
treatment provided by |
Felipe |
scientific name |
Schizoria cf. intermedia Cooper, 1989 |
status |
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Schizoria cf. intermedia Cooper, 1989
Fig. 3I.
Material.—One articulated specimen, AMNH FI−72409, bed 21b, Hamam Formation (Bathonian, middle Middle Jurassic); Arda section, Jordan.
Description.—Shell small (L = 21.6; W = 20.0; T = 15.4), elongate oval in longitudinal direction, maximum width anterior of midvalve, dorsal valve more globose than ventral valve; sides rounded, anterior commissure strongly uniplicate; ventral beak and foramen damaged; lateral commissure straight; about 17 angular to subangular costae with no bifurcations or intercalations.
Ventral valve slightly convex in lateral view, gently domed and almost flat on top, umbonal region barely swollen; sulcus broad and shallow, originating at midvalve, bearing 4 costae.
Dorsal valve moderately convex in lateral profile, and evenly but narrowly domed in anterior view; fold beginning almost at midvalve, bearing 5 costae.
The internal structures are unknown due to a lack of sufficient material for serial sectioning.
Discussion.—The shell resembles Schizoria intermedia Cooper, 1989 but a definite taxonomic assignment cannot be made at this time due to inadequate material for serial sectioning and a damaged beak on the single specimen in the collection.
Stratigraphic and geographic range.—Bathonian, Jordan.
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