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Taxonomy
Pictodelphis kidwellae was named by Godfrey and Lambert (2023). Its type specimen is CMM-V-8776, a partial skeleton (partial skull (Figures 2.57, 2.58, Table 2.8; postorbital width estimated at 144 mm) including the rostrum, part of the facial region, part of the right orbit, ), and it is a 3D body fossil. Its type locality is Parker Creek, north, Zone 10-11, which is in a Langhian estuary/bay claystone in the Calvert Formation of Maryland. It is the type species of Pictodelphis.
Synonymy list
| Year | Name and author |
|---|---|
| 2023 | Pictodelphis kidwellae Godfrey and Lambert p. 147 figs. FIGURES 2.57, 2.58 |
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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.
†Pictodelphis kidwellae Godfrey and Lambert 2023
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. J. Godfrey and O. Lambert 2023 | Small delphinidan diagnosed by the following unique combination of characters: low cranial vertex; skull only slightly asymmetrical; maxillae and presphenoid form anterior margins of bony nares; posterolateral margin of premaxillae with lateral tuberosity, medial to which there is contact with nasals; dorsomedialmost margin of maxillae immediately adjacent to vertex overhangs lower more medially placed portion of maxillae that appears to “squeeze” the vertex bilaterally from below; in dorsal view, posterior margin of combined nasals approximates the shape of the letter W; lat- eral part of each nasal inflated; deep internasal basin on vertex, extending posteriorly on anterior portion of frontals on vertex; frontals wedge forward between nasals on vertex; deep fossa for preorbital lobe of pterygoid sinus nearly contacting the fossa for the postorbital lobe, dorsal to the frontal groove; premaxillary and anterior dorsal infraorbital foramina located in the area of the antorbital notch; antorbital maxillary tuberosity/ridge pres- ent (“dorsal swelling of maxilla” in Figure 2.57B); relatively elongate rostrum, narrow for its anterior half; rostrum length 282 mm (antorbital notch to anterior extremity); 37 alveoli in left maxilla, possibly as many as 40 in right maxilla; 2 (possibly 3) alveoli per premaxilla; enamel crown of teeth conical and recurved; height of enamel crown to 6 mm; enamel base of crown to 3 mm in diameter; crown exhibits mesial and distal carinae (sometimes but rarely only weakly developed); distal carina often drawn out into accessory cusps, usually 2–4 along carina. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| Reference: Uhen 2004 | |||||