Zeilleria cf. lycetti ( Davidson, 1851 )

Vörös, A., 2014, Early Jurassic brachiopods from diverse localities of northern Anatolia (Turkey), Fragmenta Palaeontologica Hungarica 31, pp. 7-49 : 37-38

Zeilleria cf. lycetti ( Davidson, 1851)

(Figs 89–91)

* 1851 Terebratula Lycetii, Dav. – DAVIDSON, Oolitic and Liasic, p. 44, pl. VII, figs 17–19 (non figs 20–22).

non 1878 Waldheimia Lycetti, Dav. – DAVIDSON, Supplement, p. 175, pl. XXIV, figs 30, 31.

1974 Zeilleria lycetti ( Davidson 1851, sensu Buckman 1904) – DELANCE, Zeilleridés, p. 158, pl. 2, figs 11, 12.

? 1994 Zeilleria (Zeilleria) lycetti ( Davidson, 1851) – TCHOUMATCHENCO, Ouarsenis, p. 55, pl. V, figs 4, 5.

2010 Zeilleria lycetti ( Davidson, 1851 sensu Buckman, 1904) – ALMÉRAS et al., Massif Armoricain, p. 58, text-fig. 18, pl. 4, figs 3, 4.

v 2011 Zeilleria cf. lycetti ( Davidson, 1851) sensu Ager – VÖRÖS & KANDEMIR, Eastern Pontides, p. 358, fig. 5/5 (cum syn.).

v 2014 Zeilleria cf. lycetti ( Davidson, 1851) – VÖRÖS, Yakacik, p. 244, pl. II, fig. 7 .

Material – Two partly incomplete specimens from Kösrelik Kızığı (Ankara area), loose from Upper Sinemurian to Pliensbachian interval .

Measurements –

L W T Ch

INV 2014.121. 17.7 14.5 8.3 – Remarks – This species of Zeilleria has very simple morphology. Its outline is slightly drop-shaped, oval; the valves are moderately and nearly equally convex. The beak is highly elevated and suberect, with sharp beak ridges. The commissures are rectimarginate. Dental plates are visible in specimens with broken umbo. By these morphological features, our specimens were easily identified as Z. cf. lycetti .

Z. lycetti is frequently cited and illustrated but its correct interpretation bears some uncertainty. DAVIDSON (1851, pl. VII, figs 17–22) figured several different specimens under the name lycetti . BUCKMAN (1904) revised the material and designated the specimen on fig. 17 by DAVIDSON (1851) as the type specimen of “ Ornithella Lycetti ”. DELANCE (1974) and later French authors ( ALMÉRAS et al. 2010; ALMÉRAS & FAURÉ 2013) followed this practice. On the other hand, AGER (1959 a) used a wider interpretation and included the figs 17–19 of DAVIDSON (1851) as representing the species Z. lycetti . This was accepted by VÖRÖS & KANDEMIR (2011) and VÖRÖS (2014) and is followed here as well. Z. lycetti is widespread in the Pliensbachian in Northwest Europe but was also recorded in Turkey and perhaps in North Africa.