Mecaster texanus (Echinoidea) from Turonian-Coniacian strata in the Sergipe-Alagoas Basin, Brazil

Abstract

M Me ec ca as st te er r t te ex xa an nu us s ( (E Ec ch hi in no oi id de ea a) )f fr ro om m T Tu ur ro on ni ia an n--C Co on ni ia ac ci ia an n s st tr ra at ta a i in n t th he e S Se er rg gi ip pe e--A Al la ag go oa as s B Ba as si in n, , B Br ra az zi il l

Phylogeny and biogeography of some Cretaceous spatangoid echinoids with special emphasis on taxa from the Western Interior Seaway

“…For example, Micraster and Diplodetus had been grouped into a monophyletic Micrasteridae due to the shared presence of an ethmophract apical disc and similarly patterned subanal fasciole (Smith and Stockley, 2005), although Diplodetus was found to be paraphyletic herein. Further, various authors (e.g., Smith and Bengtson, 1991; Stockley et al, 2005; Oliveira et al, 2013; Manso and Souza-Lima, 2017) have, either directly or on the basis of their taxonomic assignments, posited a relatively close relationship between Mecaster and Hemiaster . Some aspects of the phylogeny (Fig.…”

“…5–10.1991 Mecaster texanum ; Smith in Smith and Bengtson, p. 13.2013 Mecaster texanum ; Oliveira et al, p. 11, figs. 7A–C, 9A–I.2017 Mecaster texanus ; Manso and Souza-Lima, p. 225, figs. 5, 6.…”