Dewalquea de Saporta and Marion, 1873

Halamski, Adam T., Kvaček, Jiří, Svobodová, Marcela, Durska, Ewa & Heřmanová, Zuzana, 2020, Late Cretaceous mega-, meso-, and microfloras from Lower Silesia, Acta Palaeontologica Polonica 65 (4), pp. 811-878 : 829

Genus Dewalquea de Saporta and Marion, 1873

Type: Dewalquea haldemiana Debey ex de Saporta and Marion, 1873 ; Campanian , Upper Cretaceous , Haldem, Westphalia .

Remarks.— Dewalquea was treated either as a separate genus (de Saporta and Marion 1873) or subgroup of Debeya ( Knobloch 1964; Halamski 2013). Krassilov et al. (2005) stressed the necessity of fine distinctions within the Debeya group, for which reason the genus rank is adopted here.

The tertiaries of D. haldemiana , the type species, are ramified ( Halamski and Kvaček 2013). Species with similar leaf architecture but with percurrent tertiaries, like Dewalquea paulinae (Halamski, 2013) Halamski comb. nov. [basionym: Debeya (Dewalquea) paulinae Halamski, 2013 ; Halamski 2013: 419, fig. 2B; see Appendix 4] from the upper Campanian of eastern Poland should possibly be segregated into another genus. The tertiary venation of Dewalquea insignis Hosius and von der Marck, 1880 , is unknown.

The representatives of Dewalquea in the studied material are segregated into three species on account on the characters summarised in Table 1 (with the reservation that the architecture of the leaf of D. haldemiana is described on the basis of the better preserved type material, not of that from Lower Silesia)

Stratigraphic and geographic range.—Turonian, Near East ( Krassilov et al. 2005); Coniacian to Paleocene, Europe; Late Cretaceous, North America ( Berry 1910, 1916b; see also Crane 1989: 177). The genus (see also van der Burgh 2008: 11–12) lacks a comprehensive revision.