Fig. 5 - Associated echinoid fauna. A, B: Schizobrissus; C: Clypeaster; D: Hypsoclypus; E: Echinolampas.

Figure 4. ( 1 ) Clypeaster test affected by fragmentation (Facies 3). ( 2 ) Test fragment of Clypeaster affected by multiple circular holes. Scale bar = 1 cm.

Fig. 5.— The clypeasteroid-dominated echinoid deposit (Facies Ittiri-B) of the Ittiri Section. A , B ) Complete tests of Clypeaster , obliquely oriented. C ) Complete specimen of Conolampas showing aboral side–down position. D ) Schizaster remains and internal mold of gastropods. E

Table 1.— Major test features of five Clypeaster morphotypes recognized within the studied echinoid assemblages. W/L  =  width-length ratio. Mod.  =  moderate.

Fig. 6.— Relative abundance of Clypeaster morphotypes from A ) Ardara and B ) Ittiri. N indicates the number of counted specimens.

Fig. 8.— Orientation data of Ardara clypeasteroid assemblage: A – C ) Clypeaster . D – F ) Amphiope . G – I ) Orientation data of Ittiri clypeasteroid assemblages. N indicates the number of counted specimens.

Fig. 4.— The clypeasteroid mass accumulation of the Ardara Section. A ) Complete test of Clypeaster within the conglomerate deposit (Facies Ardara-C). B , C ) Amphiope and Clypeaster remains within the very coarse sandstone facies above the conglomerates (Facies Ardara-D).

Figure 5. ( 1 ) Plan view of floatstone to rudstone composed of foraminifera ( Heterostegina ) in a bioclast packstone matrix (Facies 5) with abundant echinoid remains. ( 2, 3 ) Details showing accumulation of complete tests of Agassizia (A), test fragments of Clypeaster (B), regular echinoid

to moderately sorted deposits. ( d ) Gastrochaenolites bioerosional traces affecting the basal unconformity surface. ( e ) Cobble-sized clast affected by Gastrochaenolites and Entobia bioerosional traces. ( f ) Clypeaster lag. ( g ) Highly bioturbated shoreface sandstones affected by Ophiomorpha burrows

Figure 5. Assemblage 2: ( 1 ) spatangoid remains (A) and Echinocyamus (B) in fine-grained sediments within the sedimentary sequence of S’Archittu; ( 2 ) Hemipatagus (MDLCA 23654); ( 3 ) test remains of Clypeaster marginatus ; ( 4 ) remains of Genocidaris (A) and Echinocyamus (B) (MDLCA

Fig. 6.— Outcrop photos of Amphistegina -red-algal- Kuphus packstone (ARKP) facies. In addition to Kuphus , ARKP is characterized by whole Clypeaster cubensis echinoderms including some in growth position along bedding planes (white arrows, Fig. 6A, hammer on upper left for scale

Table 4. Echinoderm fragments in sediment samples (>500 µm) from core T2. Cored interval 4.5 m; recovery due to compaction 1.84 m. Water depth: 0 m. Clypeaster and Eucidaris fragments not included in analysis. S  =  spines; P  =  plates; T  =  teeth; Ech.  =  Echinometra; Dia.  =  Diadema .