The Echinoid Directory

Spatangomorpha Boehm, 1882, p. 367

Diagnostic Features	Test ovate with distinct anterior sulcus; posterior face truncate. Test depressed in profile. Apical disc plating not recorded. Anterior ambulacrum weakly sunken throughout. Pore-pairs apparently small and undifferentiated. Paired ambulacra petaloid aborally. Anterior petals strongly kinked but apparently with anterior column of pore-pairs continuing to apex. Posterior petals lanceolate; both pairs closed distally. Pore-pairs conjugate. Peristome D-shaped with slightly overarching labral plate. Labral plate narrow and elongate; disjunct from sternal plates. Sternal plates short and triangular. Episternal plates forming part of plastromn and strongly indented to rear. Periproct on posterior truncate face; base formed of interamb plates 4a,b. Subanal fasciole present; shield-shaped; enclosing 8+ ambulacral plates. Peripetalous fasciole present. Large sunken primary tubercles in lateral and anterior interambulacra aborally inside peripetalous fasciole.
Distribution	Miocene, Java.
Name gender	feminine
Type	Spatangomorpha eximia Boehm, 1882, p. 367, by original designation.
Species Included	Only the type species.
Classification and/or Status	Spatangoida, Micrasterina, Loveniidae. Monotypic; ?Subjective junior synonym of Breynia.
Remarks	Spatangomorpha resembles Breynia in most features (the strongly kinked anterior petals, the presence of large sunken tubercles inside the peripetalous fasciole, the plastron structure, the numerous ambulacral plates enclosed by the subanal fasciole). Mortensen (1951, p. 462-463) however, did not believe it could be treated as synonymous, since no inner fasciole was recorded, and the anterior column of pore-pairs in the anterior petals were illustrated as being fully developed to the apex. This may however, be an error of the illustrator and a modern description of the type material is needed. All other characters suggest this taxon is synonymous with Breynia. Bohm, A. 1882. Ueber einige tertiare fossilen von der Inseln Madura, nordlich Java. Denkschr. Kais. Akad. Wissensch. Wien. Math.-Naturw. Cl. 45(2), 359-372. Mortensen, T. 1951. A Monograph of the Echinoidea. V.2. Spatangoida 2. C. A. Reitzel, Copenhagen.