A new afrograptid (Diplostraca: Estheriellina) from the Lower Cretaceous of southern England

Liao, Huanyu; Gallego, Oscar Florencio; Shen, Yanjun; Jarzembowski, Edmund A.; Huang, Diying

doi:10.1016/j.cretres.2016.11.012

Cited by 9 publications

(1 citation statement)

References 4 publications

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“…4, 5A and B). These are different from the wavy, rounded to subtriangular shaped beads seen in assorted families of spinicaudatans, including, for instance, the antronestheriid Martinsestheria; the polygraptid Dendrostracus lagarcitoensis Pr amparo, Ballent, Gallego and Milana, 2005; the afrograptid Surreyestheria Liao, Gallego, Shen, Jarzembowski and Huang, 2017; the fushunograptids Qinghaiestheria Wang, 1983 and some putative species of Cratostracus Huang (in Chen and Shen, 1977), Orthestheria Chen (in Zhang et al, 1976) and Ordosestheria Wang, 1984(Li, 2004Shen et al, 2004;Pr amparo et al, 2005;Gallego et al, 2013;Boukhalfa et al, 2015;Li, 2017;Liao et al, 2017). One specimen of Cratostracus?…”

Section: Comparisons To Other Genera and Speciesmentioning

confidence: 68%

The morphology and systematics of the clam shrimp Platyestheria gen. nov. abaetensis (Cardoso) (Crustacea, Spinicaudata) from the Lower Cretaceous of the Sanfranciscana Basin, southeast Brazil

Bittencourt

Rohn

Gallego

et al. 2018

Cretaceous Research

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New specimens of the clam shrimp 'Pseudestheria' abaetensis Cardoso, 1971 (Spinicaudata) are described. The material was collected from the Quiric o Formation (Lower Cretaceous of the Sanfranciscana Basin), at the same locality as the type series of the species. The carapaces are very large, oval and elongated, with anteriorly located and slightly projected umbo, straight dorsal margin, with flattened growth bands and 15e20 serrated growth lines. Details of the microscopic structure of the carapace were analysed under scanning electron microscope for the first time, disclosing a unique reticular pattern of ornamentation. This species is similar to some Early Cretaceous taxa from South America, Africa and China. Yet, the peculiarities in the shape and ornamentation of the carapace support its reassignment to a new genus (Platyestheria gen. nov.), within the Superfamily Eosestherioidea. In addition, an energy-dispersive X-ray spectroscopy analysis of the multiple stacked growth bands revealed that the valves are enriched in calcium and phosphorus, similar to those of modern spinicaudatans. Minor amounts of silicon, iron and aluminium suggest that the carapaces were preserved partly through the input of ions from the environment during the diagenesis.

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