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Diagnostic Features
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- Test almost circular; depressed, weakly conical in profile
- Apical central, tetrabasal with 4 gonopores. Genital plate 2 separates posterior genital plates. Two small auxilliary plates incorporated between posterior oculars
- Periproct in anal sulcus, separated from apical disc by ca. 8 interambulacral plates in each column. Anal sulcus continuing to ambitus; slightly key-hole shaped
- Ambulacra subpetaloid aborally; pore-pairs dot-dash, with outer pore about twicer width of inner pore; extending ca. 75% distance to ambitus
- Ambulacra on oral surface narrow; plating remains simple to peristome with pore-pairs uniserial. No buccal pores
- Peristome small, circular and sunken with well developed well; slightly anterior of centre; interambulacra not swollen around peristome
- tuberculation fine and uniform
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Distribution
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Middle Jurassic (Bajocian), France |
| Name gender |
masculine |
| Type |
Galeroclypeus peroni Cotteau, 1873, p. 361, by original designation. Syntype: Museum National d'Histoire Naturelle, Paris, R62075. |
| Species Included |
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| Classification and/or Status |
Stem group Microstomata; Desorellidae
Monotypic;
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| Remarks |
Distinguished from Galeropygus by the widely separated periproct / apical disc and by the complete absence of pore crowding adorally.
Cotteau, G. 1873, in 1867-1874. Palaeontologie francaise. Terrain Jurassique. IX. Echinides irregulieres. G. Masson, Paris.
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