Cicatricosisporites sinuosus Hunt, 1985

Legrand, Julien, Pons, Denise, Nishida, Harufumi & Yamada, Toshihiro, 2011, Barremian palynofloras from the Ashikajima and Kimigahama formations (Choshi Group, Outer Zone of south-west Japan), Geodiversitas 33 (1), pp. 87-135 : 98-100

Cicatricosisporites sinuosus Hunt, 1985 ( Fig. 8K, L, S, T )

Pollen et Spores 27: 427-428, 430, pl. 2, figs 1-3 (1985). — Omran et al., Review of Palaeobotany and Palynology 66: 301, pl. 1, fig. 4 (1990). — Schrank & Ibrahim, Berliner Geowissenschaftliche Abhandlungen, Reihe A 177: 16, 17, pl. 1, fig. 14 (1995). — Ibrahim, Review of Palaeobotany and Palynology 94: 151 (1996). — Al-Ameri et al., Cretaceous Research 22: 738 (2001). — Ibrahim et al., Journal of African Earth Sciences 32 (2): 276 (2001). — Mahmoud & Deaf, Rivista Italiana di Paleontologia e Stratigrafia 113 (2): 218 (2007). — Mahmoud et al., Revista Española de Micropaleontología 39 (3): 176, pl. 5, fig. 14 (2007). — Mejia Velasquez, Floral composition of a Lower Cretaceous paleotropical ecosystem inferred from quantitative palynology: 60, pl. VIII, fig. 81 (2007). — Peyrot et al., Revista Española de Micropaleontología 39 (1-2): 142 (2007). — Legrand, Palynologie des dépôts Jurassique supérieur et Crétacé inférieur du Japon, et provinces paléofloristiques du sud-est asiatique: 156, 157, pl. VIII, figs 2-4 (2009).

Camarozonosporites insignis Norris, 1959 , Saad, Pollen et Spores 20 (2): 274, pl. III, figs 5, 6 (1978).

Reticulisporites sp. sensu Batten & Uwins (1985), Batten & Uwins, Journal of Micropalaeontology 4 (1): pl. 67, figs 1, 2 (1985). — Uwins & Batten, Subsurface Palynostratigraphy of Northeast Libya: 219, 224, pl. 43, fig. 12 (1988). — Masure et al., Géologie Méditerranéenne 25 (3-4): 273, pl. 2, fig. 20 (1998).

Reticulisporites sp., Pons et al., Géologie de l’Afrique et de l’Atlantique Sud: Compte rendu des Colloques de géologie d’Angers: 390 (1996).

Cicatricosisporites daxinganlingensis Pu & Wu, 1985 , Umetsu & Sato, Review of Palaeobotany and Palynology 144 (1-2): pl. 1, fig. 7 (2007).

OCCURRENCE. — Ashikajima and Kimigahama Fm (common).

DISTRIBUTION. — North Tethys. Upper Jurassic to Lower Cretaceous of England ( Hunt 1985). This species is known in Japan under the name Cicatricosisporites daxinganlingensis Pu & Wu, 1985 (Aptian-Albian, Umetsu & Sato 2007). It was also reported from the early Aptian of France ( Masure et al. 1998), and late Aptian-early Albian of Spain ( Peyrot et al. 2007).

South Tethys. This species is known in the?late Hauterivian-?middle Barremian and early to middle Albian of Libya under the name Reticulisporites sp. sensu Batten & Uwins (1985) ( Uwins & Batten 1988). It was also reported in the Barremian of Lebanon (Dejax, personnal communication), early Aptian of Colombia ( Mejia Velasquez 2007), late Aptian of Brazil ( Pons et al. 1996, under the name Reticulisporites sp.), Aptian-Albian of Egypt ( Saad 1978, under the name Camarozonosporites insignis Norris, 1959 ; Omran et al. 1990; Schrank & Ibrahim 1995; Ibrahim 1996; Ibrahim et al. 2001; Mahmoud & Deaf 2007; Mahmoud et al. 2007), Albian of Tunisia (Pons, personnal communication), and Albian-early Cenomanian of Iraq (Al-Ameri et al. 2001).

DESCRIPTION

Trilete microspore. Amb rounded triangular. The laesurae are straight, bordered by lips (1-1.5 µm wide), and extend to the 3/4 of the spore radius. Exine striate. Striae (0.5-1.5 µm wide; 0.5-1 µm high) are separated by spaces 0.5 to 3 µm wide; they are oblique to perpendicular to the equator, more or less sinuous and parallel, can bifurcate, and run irregularly on both faces. On the proximal face, each interradial area contains 4 to 9 striae. The exine is about 1 µm thick. Equatorial diameter = 20-35 (40) µm.

REMARKS

Hunt (1985) attributed this species to Cicatricosisporites . However, it differs from all other species already described in this genus, by its striae perpendicular to the equator on the proximal face. De Haan (1997) proposed in his thesis a new form-genus, Huntisporis, and a new combination, Huntisporis sinuosus ( Hunt, 1985) de Haan, 1997 , but both are not valid because unpublished.

Cicatricosisporites curvatus Pu & Wu, 1982 (417, pl. 8, figs 19, 20), reported from the?ValanginianBarremian of the Heilongjiang Province of North China, has a similar size (34-42 µm in diameter) and distribution of the striae, but the laters are larger (2-3 µm) than those of C. sinuosus (0.5- 1.5 µm).

Cicatricosisporites sinuosus , reported from the Neocomian-Barremian of Portugal by Trincão (1990: 155, pl. 19, figs 4, 5, 9), shows a proximal face with ridges perpendicular to the equator and a distal face rugate-reticulate, different from C. sinuosus .

BOTANICAL AFFINITIES

Cicatricosisporites sinuosus shows similarities with spores of the genus Saccoloma Kaulfuss ( Polypodiales , Saccolomataceae ) ( Murillo & Bless 1974; Tryon & Tryon 1982; Tryon & Lugardon 1991).

Figures

FIG. 8. — Spores from the Barremian of south-west Japan: A-C, Retitriletes sp. (A, proximal face, Kimigahama Fm, SEM-I1a; B, lateral view, Kimigahama Fm, SEM-I1a; C, distal face, Kimigahama Fm, SEM-I1c); D, E, H-J, Foveosporites ryosekiensis n. sp. (D, E, proximal and distal faces,Ashikajima Fm,II2a-U63;H, proximal face,Ashikajima Fm,SEM-II2a;I, proximal face,Ashikajima Fm,SEM-II2b;J, lateral