Nothocarapacestheria
Rohn et al., 2014 was erected from the Upper Triassic–Lower Jurassic of Paraná Basin, Brazil. Here we describe a
Nothocarapacestheria
species, which is discovered from the Lower Jurassic Badaowan Formation in Xinjiang, northwestern China. The described species is characterized by: 1) almost the whole carapace ornamented with medium reticulations, 3–6 polygons per growth band, 20–60 μm in mesh diameter; 2) gradual raising of radially elongated reticulations in the distal region of the carapace, sometimes ending as radial lirae; 3) fine puncta in the mesh of reticulations. Through this study, we are able to infer that the distribution of
Nothocarapacestheria
was more widespread than previously thought, and that
Euestheria
sp. previously reported from the Lower Jurassic Badaowan Formation are probably poorly preserved or juvenile individuals of
Nothocarapacestheria
.
A re-examination of the holotype of the Norian (Late Triassic) clam shrimp type species Shipingia hebaozhaiensis Shen in Zhang et al., 1976 has revealed that small and large sized reticulations are irregularly arranged in the dorsal part of the carapace. In the middle part of the carapace, large sized reticulations are located in the upper part, and small sized reticulations in the lower part of each growth band. Growth bands in the ventral part of the carapace have only small sized reticulations. This ornamentation pattern is different from that of the other Norian zonal species from North America and western Europe.
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