| Home> Gulf of California>

List species

Ceratospyris sp. cf. C. borealis Benson, 1983

Description - Add description

Benson, 1966, p. 306-307; pl. 21, figs, 9-10:

Eucoronis ? sp.

Basic structure similar to Ecoronis nephrospyris Haeckel but without discernible frontal ring which is replaced by an irregular, large but unequa1-pored lattice. Basal ring with heavy bars; primary lateral spines thin, cylindrical or conical, extending to basal ring forming collar pores in several specimens. Lattice of variable development but in several specimens completely encloses a left and right lobe; therefore, cephalis is bilocular.

Measurements; based on 19 specimens from stations 71, 92, 93, 106, and 133: sagittal height of test 66-91 µm; maximum breadth 73-166 µm.

Remarks. This species resembles those belonging to the Superfamily Triospyridicae, i.e., with a bilocular cephalis. Its affinity with Eucoronis Haeckel, however, is established by the presence of a large, heavy basal (collar) ring and thin primary lateral spines as in Eucoronis nephrospyris. This species (?) may represent a variant form of E. nephrospyris, but its bilocular cephalis gives it a distinctive appearance. Discovery of more species or variant forms belonging to the Superfamily Acanthodesmiacea that have a distinct bilocular cephalis may provide a basis for combining this superfamily with the Triospyridicae.

Distribution. Tests identified as this species are rare in the Gulf but occur as far north as station 184. None were observed at stations 27, 90, 99, 130, 151, and all those north of 184. A slightly greater frequency was observed in the southern half of the Gulf. This group is apparently unaffected by upwelling and should be regarded as oceanic with some affinity for Gulf waters.
Benson 1966
Ceratospyris(?) sp. cf. C.(?) borealis Bailey

Remarks. The forms identified by Benson (1966) as Eucoronis(?) sp. bear a superficial resemblance to Ceratospyris borealis Bailey.
Benson 1983











Discussion / Comments


Web links