The Echinoid Directory

Peronella Gray, 1855, p. 13

[?= Lambertiella Checchia-Rispoli, 1917, p. 57, type species L. pulchra Checchia Rispoli. 1917 ]

Diagnostic Features	Test ovate to subpentagonal in outline; margin thickened, usually with depressed zone surrounding petals. Apical disc central with 4 gonopores; in type species gonopores placed outside disc and perforating interambulacral plates. Hydropores scattered over surface of disc. Petals well developed; V-shaped and closed distally. Interambulacral zones very much narrower than ambulacral zones at ambitus and adorally. Periproct oral, midway between peristome and posterior margin. Opening bounded by first and second pairs of post-basicoronal interambulacral plates. Food grooves simple perradial trunks.
Distribution	Recent of the Indo-Pacific.
Name gender	feminine
Type	Laganum peronii L. Agassiz, 1841, p. 123, by original designation.
Species Included	P. peronii L. Agassiz, 1841; Recent, Australia. P. macroproctes Koehler, 1922; Recent, Indian Ocean. P. ova McNamara, 1996; Pliocene, western Australia. ?P. kamimura Cooke, 1954; Pliocene, Okinawa Islands. Most species referred to by Mortensen (1948) as Peronella are best treated as Rumphia.
Classification and/or Status	Clypeasteroida; Scutellina; Laganiformes; Laganidae; Laganinae. Monophyletic.
Remarks	Differs from Laganum and Hupea in having four gonopores, not five and in having hydropores scattered over the apical disc rather than confined to a groove or pit. Rumphia differs in having the periproct opening bounded by interambulacral plates three and four and consequently opening closer to the margin. Mortensen, T. 1948. A Monograph of the Echinoidea IV.2 Clypeasteroida. C. A. Reitzel, Copenhagen. J. W. Durham 1955 Classification of clypeasteroid echinoids. University of California Publications in Geological Sciences 31, 73-191. Gray, J. E. 1855. Catalogue of Recent Echinida, or Sea Eggs, in the Collection of the British Museum. Part 1.- Echinida Irregularia. London, British Museum.