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Hexalasma
Taxonomy
Hexalasma was named by Soshkina (1928) [Sepkoski's age data: P Leon-m P Dora Sepkoski's reference number: 1240]. It is not extant.
It was synonymized subjectively with Pseudocryptophyllum by Hill (1956).
It was assigned to Polycoeliinae by Hill (1981); to Rugosa by Sepkoski (2002); and to Pentaphyllidae by Fedorowski (2009).
It was synonymized subjectively with Pseudocryptophyllum by Hill (1956).
It was assigned to Polycoeliinae by Hill (1981); to Rugosa by Sepkoski (2002); and to Pentaphyllidae by Fedorowski (2009).
Species