Clausastrea sp.

Clausastrea sp.

Fig. 7 1–3 View Fig View Fig

v 1998 Clausastrea saltensis Alloiteau, 1960 : Morycowa & Masse, p. 747, Figs. 14.1–4

Material FPJ 434; 2 thin sections.

Dimensions (FPJ 434)

Description Tamnasterioid colony with corallites arranged in irregular rows. Septa compact. Microstructure of septa of large trabeculae. Septa in cross section equal in thickness throughout the whole septum. No symmetry of septa, but two size orders can be distinguished, that differ in length (best observable in the centre of the corallite). Septa not connected to each other. Septal distal margin unknown, lateral face with vertical keels. Pali absent. Costae present, mostly confluent. Synapticulae absent. Columella absent. Endotheca consists of numerous very thin tabulae and exothecal dissepiments. Wall absent. Coenosteum narrow, consists of costae and exothecal dissepiments. Budding extracalicinal.

Remarks The present specimen cannot be well compared to available type material. It is similar to the Late Jurassic to early Late Cretaceous Clausastrea alnisensis Alloiteau, 1960 , but it has slightly smaller dimensions and higher septal counts. The holotype of C. alnisensis (MNHN R10859) has the following dimensions and septal counts: crd, 6–8, cdw, 3.5–6; septa, 13–13. These are minimum–maximum values taken from the complete specimen because thin sections are not available.

Other material BSPG 2003 View Materials XX 5474 (Lower Aptian of Greece, Viotía, Arachova ), CGS HF 416 ( Tithonian to lower Berriasian of the Czech Republic, Morava, Štramberk ) , TUM 65963 (Tithonian of Japan, Wakayama prefecture, Nabaenohana Peninsula ) .

Other occurrence Tithonian to Lower Berriasian of the European Boreal ( Czech Republic), Tithonian of the Western Pacific ( Japan), Lower Aptian of the Central Tethys ( Greece) and Western Tethys ( France).

Clausastrea superficialis Alloiteau, 1960

Fig. 6 7–9 View Fig View Fig View Fig View Fig

* v 1960 Clausastrea superficialis : Alloiteau, p. 21, Pl. 3, Fig. 5 View Fig

v 1998 Paraclausastrea pulchra nov. sp.: Morycowa & Masse, p. 750, Figs. 14.7, 15.4–6, 17

Material FPJ 439; 2 thin sections.

Dimensions (FPJ 439)

Description Tamnasterioid, in places astreoid colony with corallites arranged in irregular rows. Septa compact. Microstructure of septa of large trabeculae. Septa in cross section equal in thickness throughout the whole septum. No symmetry of septa, but two size orders can be distinguished, that differ in length (best observable in the centre of the corallite). Septa not connected to each other. Septal distal margin unknown, lateral face with vertical keels. Pali absent. Costae present, non-confluent to confluent. Synapticulae absent. Columella absent. Endotheca consists of numerous very thin tabulae and exothecal dissepiments. Wall absent. Coenosteum narrow, consists of costae and exothecal dissepiments. Budding extracalicinal.

Remarks Te distance between corallite rows and the septal counts compare well to the holotype of Clausastrea superficialis . Similar dimensions are present in C. eliasovae Ricci et al., 2018 but that species has much higher septal counts. All other species present larger distances of corallite rows.

Other material BSPG 2003 View Materials XX 5473 (Lower Aptian of Greece, Viotía, Arachova ) , BUFGG Do 080 (Upper Oxfordian to lower Kimmeridgian of Romania, Tulcea, Dobrogea ), CGS HF 348, 371, 376, 3244 ( Tithonian to lower Berriasian of the Czech Republic, Morava, Štramberk ) .

Other occurrences Upper Oxfordian to Lower Berriasian of the Central Tethys ( Romania, Czech Republic), Tithonian of the Western Tethys ( Spain), Upper Barremian to Lower Aptian of the Western Tethys ( France), Lower Aptian of the Central Tethys ( Greece).