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Smith, A. B. & Wright, C. W. 2003. British Cretaceous echinoids. Part 7, Atelostomata, 1. Holasteroida. Monographs of the Palaeontographical Society 156 (619), 440-568.
176096
Smith, A. B.; Wright, C. W.
2003
British Cretaceous echinoids. Part 7, Atelostomata, 1. Holasteroida
Monographs of the Palaeontographical Society
156(619): 440-568
Publication
Part 7 describes the British fauna of Cretaceous irregular echinoids of the order Holasteroida. Holasteroids are heart urchins with a stretched apical disc in which the anterior and posterior genital plates are separated by intercalated ocular plates II and IV. They have either meridosternous or metasternous plastron plating. In the British Cretaceous they first appear in the Aptian and one genus, Pseudholaster, is moderately diverse in the sand facies of the Lower Cretaceous. Generic diversity increases in the chalk facies, where representatives of 12 genera are found. In total 48 species and 14 genera or subgenera are dealt with. Three new genera are established, Protocardiaster, Plesiohemipneustes and Crassiholaster, and eight new species are described, Pseudholaster caseyi, P. depressus, P. blackdownensis, Cardiaster protoplanus, Plesiocorys (Plesiocorys) transiens, P. (P.) basiprocta, Infulaster praecursor and Lampadocorys ennisi.
Date action by
Cardiaster pseudoplanus Smith & Wright, 2003 † (original description)
Crassiholaster Smith & Wright, 2003 † (original description) Crassiholaster subglobosus f. norfolkensis Smith & Wright, 2003 † (original description) Crassiholaster sulciproctus Smith & Wright, 2003 † (original description) Echinocorys gravesii (Desor in L. Agassiz & Desor, 1847) † (additional source) Hagenowia elongata (Brünnich Nielsen, 1942) † (basis of record) Hagenowia infulasteroides Wright & Wright, 1949 † (status source) Hagenowia rostrata (Forbes, 1852) † (basis of record) Infulaster excentricus (Woodward, 1833) † (basis of record) Infulaster praecursor Smith & Wright, 2003 † (original description) Lampadocorys ennisi Smith & Wright, 2003 † (original description) Plesiocorys (Plesiocorys) basiprocta Smith & Wright, 2003 † (original description) Plesiocorys (Plesiocorys) transiens Smith & Wright, 2003 † (original description) Protocardiaster Smith & Wright, 2003 † (original description) Protocardiaster truncatus (Goldfuss, 1829) † (redescription) Pseudholaster blackdownensis Smith & Wright, 2003 † (original description) Pseudholaster caseyi Smith & Wright, 2003 † (original description) Pseudholaster depressus Smith & Wright, 2003 † (original description) |