Phlogoiderhynchus squamosus ( Wang, 1956 )
publication ID |
https://doi.org/ 10.5281/zenodo.13742176 |
persistent identifier |
https://treatment.plazi.org/id/4836037D-D669-6C41-FCF5-D74BFED6F8D8 |
treatment provided by |
Felipe |
scientific name |
Phlogoiderhynchus squamosus ( Wang, 1956 ) |
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Phlogoiderhynchus squamosus ( Wang, 1956)
Fig. 4B View Fig .
1956 Paurorhyncha squamosa Wang (sp. nov.); Wang 1956: 171–172, pl. 4: D1–D5.
Material.—One almost complete, exfoliated specimen, sample PY3 (see Fig. 2 View Fig ).
Discussion.—Major features include: surface with about 35 plications, including 8 on fold; flank plications rarely bifurcating or intercalating; plications low and flat topped, with narrow interspaces; with 0–1 parietal plication; internally, dorsal median septum long, extending to about midlength.
Differences between the studied specimen and the type specimen from the same section are in slightly fewer and coarser plications on the fold. The species is assigned to Phlogoiderhynchus by its external morphology (e.g., large size: 37.4 mm wide, ± 29.4 mm long, and 20.7 mm thick for the figured specimen; wider than long, incurved or adpressed ventral beak, fold and sinus morphology, and biconvex profile). No detailed internal structures are available. It differs from the type species— Phlogoiderhynchus arefactus ( Veevers, 1959a) in its larger size, more convex dorsal valve, and stronger and more numerous flank plications. Calvinaria simplex Chen in Xu et al. (1978) from the Tuqiaozi Formation of the Longmenshan section was assigned to Phlogoiderhynchus by Sartenaer (1985: 314), which is almost smooth, and smaller.
Occurrence.—This species is only found in the Panxi section of eastern Yunnan Province; middle part of the Yidade Formation (Early Frasnian).
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Phlogoiderhynchus squamosus ( Wang, 1956 )
Ma, Xue-Ping, Becker, Ralph Thomas, Li, Hua & Sun, Yuan-Yuan 2006 |
Paurorhyncha squamosa
Wang, Y. 1956: 171 |