Debeya paulinae, Halamski, 2013

Halamski, Adam T., 2013, Latest Cretaceous leaf floras from southern Poland and western Ukraine, Acta Palaeontologica Polonica 58 (2), pp. 407-443 : 419-422

Debeya paulinae sp. nov.

Figs. 2B, C, 6C, 7E, F , 8, 9B, 10A.

1907 Dryophyllum aquamarum Ward ; Nowak 1907a: 50, pl. 1: 9.

1907 Dewalquea pentaphylla Vel. ; Nowak 1907a: 54, pl. 2: 20.

1966 Dewalquea pentaphylla Velen. ; Karczmarz and Popiel 1966: 274–275.

1967 Dewalquea pentaphylla Velen. ; Malicki et al. 1967: 230, pl. 9: 27. 1967 Dryophyllum aquamarum Ward ; Malicki et al. 1967: 228, pl. 7: 21. 1975 Dewalquea pentaphylla Velen. ; Kohlman−Adamska 1975: 164, pl. 1: 4.

Etymology: In honour of my spouse Paulina.

Type material: Holotype: a subcomplete leaf JS 3, figured herein in Fig. 2B. Paratypes: three subcomplete leaves MZ VII/32/36, IB sub Dewalquea pentaphylla (part and counterpart), JS 3, KrS 1, all from Krasnobród; fragmentary leaves KrM Pb 1/1, 3, 6, G Pb−K1, IB 721, MZ VII/33/42 from Krasnobród, L PB−K.1 (formerly 7663) from Potelych; fragments of leaves L PB−K9 (formerly 7671) from Potelych, L PBK.67 (formerly 30743) from the vicinity of Rava−Rus’ka, ZPAL 4/1/8, KrM Pb 1/2, 4, 5, 7, MZ VII/33/25, 34, 36, 45, 47, 49 from Krasnobród, ZPAL Pl 4/2/1 from Bliżów.

Type locality: Krasnobród, town quarry.

http://dx.doi.org/10.4202/app.2011.0024

Type horizon: upper Campanian. the Santonian of Aachen has external leaflets always, or often, Diagnosis.—Pentafoliolate Debeya with broad leaflets (width coalescent with median lateral ones (de Saporta and Marion to length ratio 2.5–3.5). 1873: 61). Neither condition is ever seen in our material. The comparison of D. paulinae with other representatives of the Description.—Leaf compound, pedate, petiolate, of four to genus Debeya present in the studied material is given in Table six (most commonly five) petiolulate leaflets. Petiole up to 1 and in Fig. 8. 2.7 cm, longitudinally striate, proximally inflate; petiolules

Stratigraphic and geographic range.—Roztocze (south−east up to at least 2 cm. Blade attachment marginal. Leaflet blades

Poland), late Campanian to early Maastrichtian. notophyll to mesophyll, up to ca. 16 cm in length, symmetric, oblong, length to width ratio from 2.5:1 to 3.5:1. The median Debeya insignis ( Hosius and von der Marck, 1880) leaflet is usually the widest, but more seldom all leaflets are Knobloch, 1964 subequal in size. Base cuneate, apex weakly acuminate (pos− Figs. 7A, C , 8, 9A, F. sibly to rounded; Fig. 7E ). Margin unlobed, most often ser−

1880 Dewalquea insignis Hos. & v. d. Marck; Hosius and von der rate, seldom (apparently?) untoothed ( Fig. 7E ). Teeth small Marck 1880: 172–173, pls. 32: 111–113, 33: 109, 34: 110. (ca. 1 mm wide and <0.5 mm high), rounded, either with both 1962 Dewalquea coriacea Vel. ; Cieśliński and Milaković 1962: 253 – flanks convex or proximal flank convex and distal one con− 254, pl. 2: 2. cave ( Fig. 6C 1 ). non 2010 Debeya insignis (Hosius and Marck) Knobloch, 1964 ; Her−

Primary venation pinnate with a single strong, straight man and Kvaček 2010: 68–69, text−fig. 29, pl. 24: 1–3. primary vein. Major secondaries festooned semicraspedo− Type material: Lectotype (selected herein), leaf PBO 1021−1 figured by dromous, their spacing regular, 1.5–2 per cm, attachment Hosius and von der Marck (1880: pl. 33: 109) and refigured herein in

Fig. 7A, C . Paralectotype, leaf PBO 1021−2 figured by Hosius and von excurrent, angle to midvein uniform, ca. 60 °. Intersecondary

der Marck (1880: pl. 33: 109) and refigured in Fig. 7C . Other paraproximal course parallel to major secondaries, their length <50% of the subjacent secondary, distal course tending and joining the subjacent secondary; frequency less than one per 25 intercostal area. Intercostal tertiary veins percurrent, most of− Debeya paulinae ten straight, sometimes sinuous or alternate. Quaternary and cm) 20 Krasnobród quinquenary venation regular reticulate. Principal vein ter− ( Debeya insignis minates at tooth apex. length 15 Haldem Zgubieniec (Remarks Berry, 1910.— Debeya ) Knobloch paulinae , 1964 sp from. nov the. is Tuscaloosa nearest to and D. smithii Black Leaflet Debeya 5 haldemiana 10 Krasnobród Creek Formations (Coniacian?) of Alabama and South Caro−

Haldem lina in having pentafoliolate pedate leaves with relatively 0 wide, ovate, petiolulate leaflets. They are distinguished by the 0 2 4 6

Leaflet width (cm) form of the median lateral leaflets, symmetric in the former and asymmetric in the latter ( Berry 1919: 86). Debeya aquis− Fig. 8. Biometric characteristics of species of Debeya present in the studied granensis ( Saporta and Marion, 1873) Knobloch, 1964 from material: length to width scatter diagram of leaflet shapes. +

http://dx.doi.org/10.4202/app.2011.0024

lectotypes, leaves figured by Hosius and von der Marck (1880: pl. 32: 111–113, 34: 110), repository not traced.

Type locality: Haldem, Westphalia, Germany.

Type horizon: upper Campanian.

Material.—A subcomplete leaf PIG 60.III.7 from Zgubieniec; two more fragmentary leaves, JS 4 and JS 5 from Krasnobród.

Description.—Leaf compound, pedate, petiolate, of six to seven? petiolulate leaflets. Petiole up to 3.5 cm, longitudinally striate, proximally inflate; petiolules <1 cm. Blade attachment marginal. Leaflet blades microphyll, up to at least 9 cm in length, symmetric, oblong, length to width ratio about 6:1. Base cuneate, apex probably weakly acuminate. Margin unlobed, untoothed.

Primary venation pinnate with a single strong, straight primary vein. Major secondaries festooned semicraspedodromous, their spacing regular, ca. 2 per cm, attachment excurrent, angle to midvein uniform, 50–60 °. Intersecondaries absent. Intercostal tertiary veins percurrent.

Remarks.—The comparison of Debeya insignis with other representatives of the genus Debeya present in the studied material is given in Table 1 and in Fig. 8.

The type material was interpreted as having serrate leaves ( Hosius and von der Marck 1880: fig. 109). In the present author’s opinion, the presence of serration cannot be considered proven ( Fig. 7A, C ). The leaves in the studied Polish material are entire−margined.

Stratigraphic and geographic range.—Westphalia, Nida Trough, Roztocze; “Senonian”.

Figures

Fig. 7. A, C. Eudicot Debeya insignis (Hosius and von der Marck, 1880) Knobloch, 1964. A. Lectotype PBO 1021[−1]; Haldem, Stemweder Berg, upper Campanian. General view (A1), enlargement of the petiolule branching (A2). C. General view of the slab PBO 1021 showing the lectotype (shown in A) and a paralectotype (PBO 1021[−2]) of Debeya insignis as well as two leaflets of Debeya haldemiana (shown in B); Haldem, Stemweder Berg, upper Campanian. B, G. Debeya haldemiana de Saporta and Marion, 1873. B. Fragmentary leaf PBO 1021[−3]; Haldem, Stemweder Berg, upper Campanian. G. Isolated leaflet ZPAL 4/2/2; Bliżów, lower Maastrichtian. D. Eolirion sp., fragmentary leaf ZPAL Pl 4/1/9; Krasbobród, upper Campanian. E. Debeya paulinae sp. nov., fragmentary leaf KrM Pb 1/6 (paratype); Krasnobród, upper Campanian. F. Debeya paulinae sp. nov., paratype KrS 1, enlargement of the petiolule branching (see general view in Fig. 2C). Scale bars 10 mm.

Fig. 1. Map of central Europe showing the extent of upper Cretaceous deposits (both cropping out and under Quaternary cover; simplified after von Gaertner and Walther 1971). Main studied localities are represented by diamonds.