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Sapphicorhynchus
Taxonomy
Sapphicorhynchus was named by Sartenaer (2007).
It was assigned to Sapphicorhynchidae by Sartenaer (2007).
It was assigned to Sapphicorhynchidae by Sartenaer (2007).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2007 | Sapphicorhynchus Sartenaer pp. 41 - 43 |
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. Sartenaer 2007 | Shell medium- to medium-large-size, profile strongly dorsibiconvex (dorsal valve considerably thicker than ventral valve, the flanks of which are flattening near the front in medium-large specimens); ventral valve thickest at 1/4 to 1/3 shell length, dorsal valve thickest anterior to mid-length. Shell outline subcircular to subpentagonal (length about 3/4 to 4/5 width); half barrel-shaped in frontal view. Postero-lateral and lateral commissures sharp, strongly indented by the costae. Anterior commissure fused into the wall formed by the extremities of the costae. Wide angle of the cardinal commissure. Top of shell posterior to front. Elongated concave lunulae present in both valves with zero to two costae (two in the lectotype) on each of them; they are defined by faint beak ridges near the beaks. Ventral beak acute, slightly to strongly incurved; umbo low. Ventral interarea short; deltidial plates narrow. Sulcus and fold well marked, start imperceptibly at a short distance from the beaks. Sulcus wide, moderately deep and well delineated towards margin; bottom flat to slightly convex, extended dorsally as a moderately high tongue with subtrapezoidal outline, recurving slightly posteriorly in its uppermost part. Fold remains low throughout; top gently convex. In transverse profile, dorsal valve high, outer flanks deflected ventrally to be almost vertical near commissure. Median and lateral costae, in moderate number, start from the beaks [Remark: number of costae is not related to the ontogeny as implied by the founder of the species (HALL, 1860, p. 87; 1867, p. 340)]. Costae well marked, moderately high, wide, rounded, simple, and regular. Costae (with the exception of the postero-lateral ones) interlock in high zigzags at the commissure. Parietal costae, when present, reach and indent the commissure.
Internal structures delicate. Dental plates subparallel posteriorly, becoming convergent anteriorly; umbonal cavities wide; teeth short, with wrinkled dorsal face. Inner socket ridges low. Septum long; septalium deep and wide (deeper than wide), amphora-shaped; hinge plate undivided, outer hinge plates flat to slightly convex passing without sign of crural bases into long crura; crura raduliform, Phrygian cap-shaped in section in their distal part where they are slightly curved ventrally; connectivum covering anterior part of septalium, and extending beyond. |
Measurements
No measurements are available
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Collections (20 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Emsian - Eifelian | Colombia | Camarotoechia sappho (36017) | |
| Eifelian - Givetian | USA (New York) | Camarotoechia sappho (54379 54407) | |
| Middle Devonian | USA (New York) | Cupularostrum sappho (91215) | |
| Givetian | USA (Indiana) | Camarotoechia sappho (170009) | |
| Givetian | Colombia | Camarotoechia sappho (35982) | |
| Givetian | USA (New York) | Camarotoechia sappho (8728 8735 8961) Cupularostrum sappho (89648 89652 89654 89659 89663 89669 89671 94410 94411 111443) | |
| Givetian | USA (Pennsylvania) | Camarotoechia sappho (9912) |