Dewalquea haldemiana Debey ex 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 : 829-831

Dewalquea haldemiana Debey ex de Saporta and Marion, 1873

Fig. 10A–D.

1873 Dewalquea haldemiana ( Araliophyllum haldemianum Deb. Ms. ); de Saporta and Marion 1873: 60–61, pl. 7: 1–2.

1889 Dewalquea haldemiana ; Roemer 1889: 143, in part: non fig. 12: 3.

non 2009 Debeya haldemiana ; Mohr 2009: text-fig. 11.

2013 Debeya haldemiana (Debey ex de Saporta and Marion, 1873) Knobloch, 1964 ; Halamski 2013: 422, figs. 7B, G, 8, 9C, D, E, 10C.

2013 Debeya (Dewalquea) haldemiana (Debey ex de Saporta et Marion 1873) Halamski, 2013 ; Halamski and Kvaček 2013: 83–84; text-fig. 1 [ubi syn.].

2016 Debeya (Dewalquea) haldemiana (Debey ex de Saporta & Marion, 1873) Halamski, 2013 ; Halamski et al. 2016: 217–221; figs. 2a, e, f, 5 [ubi syn.].

Material.—Rakowice Małe, Assemblage 4, upper Coniacian?–lower Santonian?: MB.Pb.2008/0256, 0320, 0365, 2018/0059 (coll. Schaefer), MB.Pb.2018/0060, 0063a, 0065, 0066, 0080.1–3, 0084, 0088. Żerkowice, Assemblage 4, upper Coniacian?–lower Santonian?: MB.Pb.2018/0079; Assemblage 5, upper Coniacian?–lower Santonian?: MB.Pb. 2018/0058; Assemblage 7, lower–middle Santonian: MB.Pb. 2008/0344. Bolesławiec, Assemblage 8, lower–middle Santonian: MGUWr 1699p.a.

Description.—Leaf compound, pedate, consisting of seven subsessile leaflets, petiole most probably present but not preserved in the studied material. Leaflet width never exceeding 10 mm, maximum preserved length 9 cm, estimated length ca. 15 cm. Base cuneate, apex not preserved. Margin unlobed, untoothed. Venation pattern pinnate, probably brochidodromous (Fig. 10D), secondaries departing at ca. 45°.

Remarks.—The material from Assemblage 4 described herein as D. haldemiana is fragmentary. Nonetheless, the coriaceous, oblong leaflets with length-to-width ratios exceeding 10 and thickened entire margins are sufficiently characteristic to be identified, like in the case of mass accumulations of leaflets of the same species in the Campanian of Scania (Halamski et al. 2016: fig. 5). The material from Bolesławiec figured by Roemer as D. haldemiana (1889) has wider leaflets and is described below as D. aff. gelindenensis ; that figured by Mohr (2009) from the same outcrop has serrate margins (Fig. 10F 4, F 5) and is decribed below as D. insignis ; however, a single genuine specimen of D. haldemiana (Fig. 10C) was found in the same outcrop as well.

Stratigraphic and geographic range.—Late Coniacian to Santonian: Lower Silesia (this work); Campanian:Westphalia ( Hosius and von der Marck 1880), Scania (Halamski et al. 2016), Roztocze (Halamski 2013); Maastrichtian: Volhynia- Podolia Upland (Halamski 2013).