Clypeolus tortugaides ( Cramer, 1966a ) Miller, Playford, and Le Hérissé, 1997

García Muro, Victoria J., Rubinstein, Claudia V. & Steemans, Philippe, 2018, Late Silurian palynomorphs from the Precordillera of San Juan, Argentina: Diversity, palaeoenvironmental and palaeogeographic significance, Acta Palaeontologica Polonica 63 (1), pp. 41-61 : 46

Clypeolus tortugaides ( Cramer, 1966a) Miller, Playford, and Le Hérissé, 1997

Fig. 5O .

Material.— One specimen recorded. Sample 4-62521 V42/2). Subcircular vesicle, divided in fields by the concavo-convex wall. Ludfordian of Argentina. Quebrada Ancha locality, Los Espejos Formation.

Remarks. —It is considered as a fresh water palynomorph, from transitional marine-freshwater environment ( Le Hérissé et al. 2013). The specimen from the Los Espejos Formation constitutes the first record of South America.

Stratigraphic and geographic range. — It was only recognized in the Upper Ordovician of Chad ( Le Hérissé et al. 2013) and Canada ( Delabroye et al. 2011), in the middle Llandovery of Saudi Arabia and in the Silurian of Spain Miller et al. 1997 and references therein).

Figures

Fig. 5. Palynomorphs from the studied sections of the Los Espejos Formation of Argentina, Quebrada Ancha, Gorstian?–Ludfordian? (A, T), Quebrada Ancha, Ludfordian (B–F, H–K, N, O, Q, R), Cerro La Chilca, Ludfordian (G, L, M, P, S). A. Ammonidium cornuatum Loeblich and Wicander, 1976; MPLP 8-60677 (H27/3). B. Ammonidium ludloviense (Dorning, 1981) Mullins, 2001; MPLP 2-60704 (T22/2). C. Ammonidium maravillosum (Cramer, 1969) Thusu, 1973a; MPLP 7-60736 (S29/1). D. Ammonidium waldronense (Tappan and Loeblich, 1971) Dorning, 1981; MPLP 8-60677 (T50/2). E. Ammonidium sp. A in Mullins 2001; MPLP 7-60736 (N27/1). F. Indeterminated miospore, MPLP 8-60677 (O44/2). G. Baculatireticulatus baculatus Al-Ameri, 1984; MPLP 4-61059 (J45/4). H. Baculatireticulatus sp.; MPLP 7-60736 (N43/2). I. Breconisporites sp.; MPLP 8-60677 (U33). J. Buedingiisphaeridium lunatum Le Hérissé, 1989; MPLP 4-61059 (D47). K. Carminella maplewoodensis Cramer, 1968; slide MPLP 7-60736 (R26/2). L. Chelinospora cf. cantabrica Richardson, Rodríguez, and Sutherland 2001; MPLP 5-61060 (U38). M. Chelinospora sanpetrensis (Rodríguez, 1978) Richardson, Rodríguez, and Sotherland 2001; MPLP 7-61062 (C35). N. Chelinospora verrucata var. verrucata Morphon in García Muro et al., 2014b; slide MPLP 8-60677 (K43/1). O. Clypeolus tortugaides (Cramer, 1966a) Miller, Playford, and Le Hérissé, 1997; MPLP 4-62521 (V42/2). P. cf. Concentricosisporites agradabilis (Rodríguez, 1978) Rodríguez, 1983; MPLP 6-61061 (H45/1). Q. Confossuspora sp.; MPLP 2-60704 (O42/1). R. Cordobesia uruguayensis (Martinez- Macchiavello, 1968) Pöthé de Baldis, 1977; MPLP 3-60659 (E46/4). S. Coronaspora cromatica (Rodríguez, 1978) Richardson, Rodríguez, and Sutherland, 2001; MPLP 4-61059 (Q28). T. Cymatiosphaera acuminata Mullins, 2001; MPLP 8-60677 (G48/3). Scale bars 20 μm.