Shipingiidae Kozur & Weems, 2005

LI, GANG, 2022, SEM morphological study of the Late Triassic clam shrimp Shipingia hebaozhaiensis (Spinicaudata, Crustacea) from Yunnan, southwestern China, Palaeoentomology 5 (4), pp. 298-304 : 299

Family Shipingiidae Kozur & Weems, 2005

Emended diagnosis. Carapace small or moderate in size, with a distinct posterodorsal corner. The slightly convex umbo is narrow and small, located in the anterior part of the long and straight dorsal margin. Number and width of growth bands are variable. Microsculpture distinct, consisting in part of small and large sized reticulations and irregular radial lirae, though sometimes the reticulation may be arranged in oblique stripes or parallel to the growth lines.

Remarks. Shipingia Shen in Zhang et al., 1976 was originally assigned to the family Loxomegaglyptidae Novozhilov, 1958 , which was elevated from the subfamily Loxomegaglyptinae Novozhilov, 1958 by Zhang et al. (1976), to include taxa bearing medium- to large-sized reticulations (mesh diameter between 20 and 200 µm). The type genus Loxomegaglypta Novozhilov, 1958 was considered possessing large-sized, hexagonal reticulations (mesh diameter between 50 and 100 µm) according to the text-fig. 4 of Novozhilov (1958). Recently, an SEM study on the type specimen of Loxomegaglypta wetlugiana Novozhilov, 1958 has clearly revealed a sieve-like fine pit ornamentation on growth bands (mesh diameter between 15 and 25 µm), which is much smaller than originally considered ( Li, 2020c). Thus, the author follows the opinion of Kozur & Weems (2005), to remove Shipingia and Anyuanestheria Zhang & Chen in Zhang et al., 1976 from Loxomegaglyptidae , and allocate them to Shipingiidae Kozur & Weems (2005) . Kozur & Weems (2005) also assigned Laxitextella Kozur, 1982 and Redondestheria Kozur, Weems & Lucas in Kozur & Weems, 2005 to the family Shipingiidae .