Tromikosoma uranus ( Thomson, 1877 )

Filander, Zoleka & Griffiths, Charles, 2017, Illustrated guide to the echinoid (Echinodermata: Echinoidea) fauna of South Africa, Zootaxa 4296 (1), pp. 1-72 : 24

* Tromikosoma uranus ( Thomson, 1877)

Fig. 21 A–C.

Phormosoma uranus: A. Agassiz, 1881: 103 .

Echinosoma uranus: H.L. Clark, 1925a: 57 .

Tromikosoma uranus: Mortensen, 1935: 168 –170. Pl. VI, Figs 2–3 . Pl. LXXV, Figs 19–21 ; Schultz, 2011: 1108, Figs 1943– 1944; Filander & Griffiths, 2014: 52. Pl. I, Fig. H.

Material examined. SAMC-A22122.

Identification. Test hemispherical. Large tubercles reported to be outside pore-pairs of distal oral ambulacra. Madreporite divided into 3–4 parts, but this seems to be an individual variation ( Mortensen, 1935).

Global maximum size. Maximum test diameter 125 mm.

Global distribution. Portugal to West Africa, also reported from the West coast region of South Africa ( Filander & Griffiths 2014); at 850–2750 m depth ( Schultz, 2011).

Remarks. Record based on a single identified sample from the Iziko South African Museum.

Figures

FIGURE 2. Body plan of an irregular echinoid or sand dollar (Clypeaster rarispinus), showing terminology of various body parts.

FIGURE 3. The body plan of an irregular echinoids or heart urchin (Echinocardium cordatum), showing terminology of different body parts.

FIGURE 19. Hygrosoma petersii (SAMC-A 22219). A. Map showing distribution. B. Aboral view of preserved specimen. C. Oral view of preserved specimen.

FIGURE 20. Sperosoma biseriatum A. Map showing distribution. B. Aboral view of preserved specimen (Schultz, 2010). C. Oral view of preserved specimen (Schultz, 2010).

FIGURE 21. Tromikosoma uranus (SAMC-A 22122). A. Map showing distribution. B. view of preserved specimen. C. Oral view of preserved specimen.