Chrispaulia Gale, 2005

Gale, Andy S. & Jagt, John W. M., 2021, The fossil record of the family Benthopectinidae (Echinodermata, Asteroidea), a reappraisal, European Journal of Taxonomy 755, pp. 149-190 : 174-175

Genus Chrispaulia Gale, 2005

Chrispaulia Gale, 2005: 2 , fig. 4a–c.

Type species

Nymphaster radiatus Spencer, 1905 , by original designation (see Fig. 13A–C ).

Diagnosis

Arms long, narrow; disc small, with rounded interbrachial arcs; superomarginals meeting over radius along length of arm; distal marginals imbricate (emended from Gale 2005).

Assigned species

In addition to the type species, Chrispaulia jurassica Gale, 2011 ( Gale 2011a) , C. wrightorum sp. nov. and C. spinosa sp. nov.

Remarks

The record in the Treatise of Invertebrate Paleontology (Part U; Spencer & Wright 1966) of a benthopectinid from the “Albian of England ” is based on an arm fragment from the Albian Red Chalk of Yorkshire, United Kingdom (C.W. Wright, pers. comm. to ASG, 1978). We have examined this specimen (NHMUK PI EE 17997), which comprises five marginal ossicles reconstructed on plasticene. The shape of the ossicles indicates that this specimen belongs to the genus Chrispaulia ; it is here described as a new species, C. wrightorum sp. nov. (see below). In addition, we record another species from the Hauterivian (Lower Cretaceous) of northeast England and northern Germany.

Figures

Fig. 7 (next page). A–J. Jurapecten infrajurensis sp. nov., various ossicle types (paratypes). A, H. Ambulacrals, in lateral and actinal aspects, respectively (SNSB-BGSP2020XLV 21,SNSB- BGSP2020XLV 28). B, E–F. Adambulacrals, in actinal and abactinal views (SNSB-BGSP2020XLV 22, SNSB-BGSP2020XLV 25–26). C, G, J. Superomarginals, in lateral views (SNSB-BGSP2020XLV 23, SNSB-BGSP2020XLV 27, SNSB-BGSP2020XLV 30). D, I. Inferomarginals, in lateral views (SNSB-BGSP2020XLV 24, SNSB-BGSP2020XLV 29). — K–Y. Jurapecten hessi Gale, 2011. K, P, U. Adambulacral ossicles. K. Abactinal view (NHMUK PI EE 17996). P. NHMUK EE 13598 (the original of Gale 2011a: pl. 19 fig. 11). U. NHMUK EE 13599, the original of Gale (2011a: pl. 20 fig. 12). L. Circumoral ossicle (NHMUK EE 13605, the original of Gale 2011a: pl. 20 fig. 13). M–N. Ambulacral ossicles, in actinal and abactinal views, respectively (NHMUK EE 13595–13596, the originals of Gale 2011a: pl. 19 figs 8–9). O. Ambulacral, in proximal/distal view (NHMUK 13597). Q–S. Superomarginal ossicles (NHMUK EE 13601–13602; the originals of Gale 2011a: pl. 20 figs 6–7). T, V–W. Inferomarginals (NHMUK EE 13600, EE 13603–13604, EE 13608, the originals of Gale 2011a: pl. 20 figs 5, 8, 16). X–Y. Oral ossicles (NHMUK EE 13606– 13607, the originals of Gale 2011a: pl. 20 figs 10, 14). Provenance: A–J. Upper Toarcian–lower Aalenian (possibly aalensis ammonite Zone), Quedlinburg (Landkreis Harz, northern Germany; see Hess 2014). K–Y. Upper Oxfordian (Couches d’Effingen, bifurcatus ammonite Zone, stenocycloides ammonite Subzone), Savigna, near Orgelet, Département du Jura, France (Gale 2011b). Abbreviations: d = distal; p = proximal. See Fig. 3 for detailed morphological terminology. Scale bars: A–J = 0.2 mm; K–Y = 0.5 mm.