The Echinoid Directory

Contributed by Andreas Kroh, November 2011

Laticlypus Szoerenyi, 1966, p. 446

Diagnostic Features	Test large; cordiform in outline; low domal in profile. Apical disc disjunct, but not strongly so; posteriorly displaced; posterior ocular plates immediately above periproct, but unknown if in actually in contact; detailed structure unknown. Paired ambulacra narrow aborally, with small, non-elongate pore pairs. Ambulacrum III narrow, depressed, increasingly so towards the ambitus, where it forms a deep frontal notch; on the oral surface it forms a sharply defined groove; pores microscopic. Plastron plating unknown. Peristome anteriorly displaced; oval, longitudinally elongated; facing anteriorly in deep groove. Periproct small, circular; aboral; in deep groove. Tubercles small, crenulate, perforate. Spines unknown.
Distribution	Middle to Upper Jurassic (late Middle Jurassic to Oxfordian); Hungary.
Type	Laticlypus giganteus Szoerenyi, 1966, p. 448, by original designation.
Species Included	Only the type.
Classification and/or Status	Irregularia, Stem group Atelostomata, Collyritidae. Monotypic; possibly a junior synonym of Cardiolampas Pomel, 1883.
Remarks	Close to Cardiolampas, but differing by its more aboral periproct, which lies in a distinct groove, by its less widely disjunct apical disc and larger ambulacral pores in the aboral paired ambulacra. Distinguished from all other collyritids by its possession of a frontal notch grading into a deep groove which terminates in the peristome adorally. The name is also spelled Latyclipus (incorrect original spelling) on p. 447 of Szörenyi's (1966) paper, but elsewhere in the paper consistently is used as Laticlypus, which thus is the preferred spelling. The name Laticlypeus was first used by Szörenyi (1960, p. 333), but did not became available from that work, since it is not accompanied by a description or illustration (nomen nudum). Szörényi, E. 1966. Laticlypus giganteus n. gen. n. sp. (Echinoidea) des assises Jurassiques de la Montagne Bakony. Acta Geologica, Academiae Scientarum Hungaricae 10, 445-452. Szörényi, E. 1960. Échinodermes Mésozoïques de la Hongrie. Annales Instituti Geologici Publici Hungarici 49, 331-337.