Caryanthus triasseris Knobloch (Knobloch and Mai), 1983

Heřmanová, Zuzana, Kvaček, Jiří, Dašková, Jiřina & Halamski, Adam T., 2020, Plant reproductive structures and other mesofossils from Coniacian / Santonian of Lower Silesia, Poland, Palaeontologia Electronica (a 61) 23 (3), pp. 1-23 : 10

Caryanthus triasseris Knobloch (Knobloch and Mai), 1983

Figure 5 A-F

v1964 Microcarpolithes triasseris Knobloch ; ( Knobloch, 1964) p. 170, pl. 5, fig. 6.

v1970 Microcarpolithes octocostatus Knobloch ; ( Knobloch, 1970), pl. 11, figs. 4, 16, 17.

v1971 Microcarpolithes octocostatus Knobloch ; ( Knobloch, 1971) p. 27, pl. 6, figs. 1-5, 9, 11.

v1971 Microcarpolithes triasseris Knobloch ; ( Knobloch, 1971) p. 21-5, pl. 3, figs. 1-8 (non figs.9- 14), non pl. 6, figs. 12-13, pl. 10, fig. 5.

v1977 Microcarpolithes triasseris Knobloch ; ( Knobloch, 1977) p. 113-114, pl. 1, figs. 5, 9,11, 13, 16, 18, 19, pl. 2, figs. 8, 10, pl. 4, figs. 25, 26, pl.5 figs. 13, 21-23 pl.11, 6-9.

v1983 Caryanthus triasseris (Knobloch) Knobloch et Mai ; ( Knobloch and Mai, 1983) p. 309, pl. 6, figs. 4, 5 (non pl. 6 fig. 11), (non pl. 8 fig. 6), pl.

9, fig. 8, pl. 10 fig. 9.

v1986 Caryanthus triasseris (Knobloch) Knobloch et Mai ; ( Knobloch and Mai, 1986) p. 76, pl.5 figs.

1-3. non (figs. 7-10), (non pl. 6 fig. 18).

v2006 Caryanthus triasseris (Knobloch) Knobloch et Mai ; ( Friis et al., 2006) p. 113.

v2016 Caryanthus triasseris (Knobloch) Knobloch et Mai ; ( Heřmanová et al., 2016) p. 44 pl. 7 figs. 1- 11.

Holotype. Published by Knobloch (1964); pl. 5, fig.

6, stored in the National Museum Prague No. NMP

F 3611, Late Cretaceous, Upper Turonian–Santo-

nian, Včelná borehole GB 2 119.5–119.8 m, Czech

Republic.

Description. Four specimens from Rakowice Małe locality are fruits, round to elliptical in shape.

Length 0.9–1.3 mm (arithmetic mean 1.0 mm);

breadth 0.7–1.1 (arithmetic mean 0.1). Three specimens round ( Figure 5A ), one elongated (Figure

5D). Apical part of fruit pointed or slightly pointed

( Figure 5B, E ), as well as its base. Perianth persistent, fused basally, forming a hypanthium, which extends for almost the entire length of fruit. Lateral faces of fruit have three very indistinct ribs running from the base to the margin of hypanthium.

Discussion. Specimens of Caryanthus triasseris from the Rakowice Małe locality are above average in size of the fruits, compared to the type material

( Knobloch and Mai, 1986). The ribs that are very characteristic for the species run from the base to the margin of the hypanthium. However, this character is very indistinct in material from Rakowice Małe.

Range. Late Coniacian or early Santonian age.

Occurrence. Rakowice Małe locality.

Material studied. NM K 2898; K 2901; K 2902; K 2907; the material is housed in the National Museum Prague.

Figures

FIGURE 5. Caryanthus triasseris (A) ribbed fruit round in outline, no. K2901 (B) apical part of fruit, no. K2901 (C) detail of epidermis, no. K2901 (D) ribbed fruit elliptical in outline, no. K2907 (E) apical part of fruit, no. K2907 (F) detail of epidermis, no. K2907. Scale bar for all images 0.1 mm. All specimens from Rakowice Małe locality.