Zlivifructus, Hermanova, Daskova et J. Kvacek, 2017

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 : 11-13

Zlivifructus microtriasseris (Knobloch et Mai) Heřmanová, J.Kvaček et Halamski 2019

Figure 7 A-C

v1983 Caryanthus microtriasseris Knobloch et Mai ; ( Knobloch and Mai, 1983) p. 308-309, pl.8, fig. 9.

v1986 Caryanthus microtriasseris Knobloch et Mai ; ( Knobloch and Mai, 1986) p. 76, pl. 5, figs. 5-6, pl. 55, fig. 3.

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

v2016 Caryanthus microtriasseris Knobloch et Mai ;

( Heřmanová et al., 2016) p. 40, pl. 5, figs. 1-3. v2019 Zlivifructus microtriasseris (Knobloch et Mai)

Heřmanová, J. Kvaček, Halamski in

( Heřmanová et al., 2019), p. 90, p. 11, figs. 1-9. Holotype. No. NMP F3872, selected and illustrated by Knobloch and Mai (1983); pl. 8 fig. 9, stored in the National Museum Prague, Late Cretaceous, Upper Turonian–Santonian, Záblatí borehole 65/21, 34.0–35.0, Czech Republic.

Description. The single specimen from Rakowice Małe locality is a small, flat fruit, round in outline ( Figure 7A ). Length 0.4 mm; breadth 0.4 mm. Apical part of the fruit concave ( Figure 7B ), basal part convex. Persistent perianth fused basally, forming hypanthium, which extends more than two thirds of the fruit. Tepals not preserved; but scars indicating their insertion present. Lateral attachment scars of tepals and medial attachment scars immediately adjacent to each other, with indistinct boundaries forming a ring. Androecium consists of four stamens ( Figure 7B ), but only basal parts of stamens are preserved. Lateral faces of the fruit show two parallel ribs running from base of fruit to margin of hypanthium.

Remarks. This specimen was revised in Heřmanová et al. (2019). Fowers and fruits of Zlivifructus microtriasseris , originally described as Caryanthus microtriasseris from the North Sudetic Basin and South Bohemian Basins (late Turonian - Santonian) were reinterpreted. Zlivifructus microtriasseris differs from species assigned to genus Caryanthus Friis (1983) in the presence of four stamen scars, and in having two lateral ribs in the face of the fruit ( Heřmanová et al., 2019).

Range. Late Coniacian or early Santonian age.

Occurrence. Rakowice Małe locality.

Material studied. K 1290; the material is housed in the National Museum Prague.

Figures

FIGURE 7. Fruits of Normapolles (A) Zlivifructus microtriasseris small fruit, basal parts of stamens arrowed, no. K 1290 (B) Zlivifructus microtriasseris apical part of fruit, basal parts of stamens arrowed, no. K 1290 (C) Zlivifructus microtriasseris detail of epidermis, no. K 1290 (D) Normapolles aff., deformed fruit, no. K2904 (E) Normapolles aff., apical part of the fruit, no. K2904 (F) Normapolles aff., apical part of the fruit, basal pats of stamens arrowed (st), basal parts of two very narrow tepals arrowed (te), no. K2904. Scale bar for all images 0.1 mm. All specimens from Rakowice Małe locality.