Salpingoporella annulata ( Carozzi, 1953 )

Bucur, Ioan I., Granier, Bruno & Krajewski, Marcin, 2014, Calcareous Algae, Microbial Structures And Microproblematica From Upper Jurassic-Lowermost Cretaceous Limestones Of Southern Crimea, Acta Palaeontologica Romaniae 10 (1 - 2), pp. 1-2 : 67-70

Salpingoporella annulata ( Carozzi, 1953)

Fig. 6 g-k

Salpingoporella gr. pygmaea ( Gümbel, 1891) emend. Carras et al., 2006

Fig. 7 a-k

Recently, Carras et al. (2006) revised the species of Salpingoporella . In the limestones studied from Crimea we identified both S. annulata and S. gr. pygmaea .

S. annulata is common in deposits of the inner platform ( Carras et al., 2006), sometimes showing almost monospecific distribution, and is abundant in restricted inner platform environments ( Bucur & Săsăran, 2005).

S. gr. pygmaea is one of the most common dasycladaleans we have identified in Crimea, being typical of reef environments. Carras et al. (2006) included several previously discrete species within this name: Salpingoporella exilis and Salpingoporella johnsoni ( Dragastan, 1971) , Salpingoporella enayi and Salpingoporella etalloni ( Bernier, 1984) . Carras et al. (2006: p.486) suggested that a distinctive feature for the species is the presence of “laterals arranged in quincunxes, […] first leaning up narrow and slightly widening out, then subhorizontal, markedly widening out.” Nevertheless, not all the specimens illustrated in the references correspond to this description. Sometimes the laterals are short, phloiophorous and slightly inclined, lacking the distal end (e.g., Hofmann, 1991, Pl. 1, figs. 1- 3; Senowbari et al., 1994, pl. 3, figs. 6, 9, or the present paper, Fig. 7a ).

On the other hand, Carras et al. (2006) also emphasized that defining a species based on the ratios between size parameters (cf. Bernier, 1984) is a counterproductive principle that should be abandoned, and this is supported by our diagrams based on the Crimea specimens ( Fig. 8 ab).

Figures

Fig. 6 Calcareous algae (Dasycladales) from the Yalta-Ay Petri area, southern Crimea. a, f Rajkaella sp. Sections through secondary laterals. a, sample KA-11; f, sample KR-9. b to e Rajkaella cf. iailensis (Maslov). Distal part of primary laterals and secondary laterals in longitudinal-oblique section. b, sample KE-4; c, sample KJ-32; d, e, sample KR-9. g to k Salpingoporella annulata Carozzi in longitudinal-oblique (g), oblique (h), longitudinal (i), transverse (j) and transverseoblique (k) sections. g, sample KE-4d; h, sample KJ-5e; i, sample KA-7; j, k, sample KE-4b. Scale bar: 0.25 mm (a to k).

Fig. 7 Calcareous algae (Dasycladales) from the Yalta-Ay Petri area, southern Crimea. a to k Salpingoporella gr. pygmaea (Gümbel) in longitudinal oblique and oblique (a to f) sections, and transverse-oblique and transverse (g to k) sections. a, c, sample KB-15b; b, sample KC-11; d, sample KB-47a; e, sample KB-6b; f, sample KB-5; g, sample KB-40a; h, sample KB-42d; i, sample KO-3a; j, sample KB-13; k, sample KB-15c. Scale bar: 0.25 mm (a to k).

Fig. 8 Diagram showing variation of D (external diameter) in relation to a (diameter of the axial cavity) (a) and to the ratio d/D (b) in Salpingoporella gr. pygmaea.