Polychaetaspis, Kozlowski, 1956

Szaniawski, Hubert & Drygant, Daniel, 2014, Early Devonian scolecodonts from Podolia, Ukraine, Acta Palaeontologica Polonica 59 (4), pp. 967-983 : 973

Polychaetaspis ? spp.

Fig. 5I–L .

Material.—Anterior plates: one left (ZPAL.Sc.8/2.24), sample Sc.8/2.11, and 4 right MIV (ZPAL.Sc.8/2.1, 2.11, 2.12, 2.24), sample S.Kh.1; section 48, Lower Lochkovian, Podolia.

Description.—Five right and one left similar plate-like anterior jaws with five or six teeth of which the first is much bigger than the rest, and with wide opening of the pulp cavity. The jaws have been found in the same sample as all the elements of P. kozlowskii sp. nov. and probably represent MIV of the species. Somewhat similar elements occur also in apparatuses of other eunicids, e.g., in paulinitids (see Fig. 7I–L ) or Kielanoprion Szaniawski and Wrona, 1973 . Jansonius and Craig (1971) based on somewhat similar elements proposed to establish genus Cheiridogenys but it can be a junior synonym of Polychaetaspis . Certain determination of most of the isolated anterior elements of eunicids is presently not possible. However, the co-occurrence of all illustrated here elements with the jaws of P. kozlowskii , as well as total lack of similar elements in all other samples, strongly suggest that they also belong to the same species.

Figures

Fig. 5. SEM micrographs of polychaetaspid scolecodonts from Lower Lochkovian of Podolia, lower part of Borshchiv Horizon, section 48, sample S.Kh.1. A–G. Polychaetaspis kozlowskii sp. nov. A. ZPAL Sc.8/2.6, holotype, right MI in dorsal view. B. ZPAL Sc.8/2.15, right MI in dorsal view. C. ZPAL Sc.8/2.14, incomplete right MI in dorsal (C 1) and ventral (C 2) views. D. ZPAL Sc.8/2.5, basal plate in dorsal (D 1) and right lateral (D 2) views. E. ZPAL Sc8/2.17, left MI in dorsal (E 1) and left lateral (E 2) views. F. ZPAL Sc.8/2.13, left MI in dorsal (F 1) and oblique ventral (F 2) views. G. ZPAL Sc.8/2.4, left MI in dorsal (G 1) and oblique left lateral (G 2) views. H. Polychaetaspis? sp., ZPAL Sc.8/2.20, left MIII? in dorsal (H 1) and right lateral (H 2) views. I–L. Polychaetaspis? spp. anterior plates (MIV). I. ZPAL Sc8/2.1, right MIV in dorsal (I 1) and dorsal lateral (I 2) views. J, K. Right MIV in ventral lateral view. J. ZPAL Sc8/2.12. K. ZPAL Sc.8/2.11. L. ZPAL Sc8/2.24, left MIV in ventral lateral view.

Fig. 7. SEM micrographs of selected elements of paulinitid scolecodonts and undetermined anterior elements from Lower Devonian of Podolia: Ivanye Horizon, section 58 (D, O), section 73 (M, N, K), section 76 (A–C, E, G–J, L); Chortkiv Horizon, section 70 (F). A–D. “Kettnerites”? spp. A, B. Left mandibles in dorsal view. A. ZPAL Sc.8/8.19, sample S.IZ.13. B. ZPAL Sc.8/11.14, sample S.Za.2. C, D. Right mandibles in dorsal view. C. ZPAL Sc.8/7.1, sample S.IZ.16. D. ZPAL Sc.8/10.6, sample S.Za.12. E. Family uncertain, gen. et sp. indet.A, ZPAL Sc.8/7.9, sample S.IZ.16, in lateral view. F. Family uncertain, gen. et sp. indet. B, ZPAL Sc.8/4.22, sample S.Zo.4, in lateral view. G. Family uncertain, gen. et sp. indet. C, ZPAL Sc.8/7.18, sample S.IZ.18, in lateral view. H, M–O. “Kettnerites” spp. left MIII. H. ZPAL Sc.8/11.5, sample S.I.Z.18, in dorsal (H 1) and left lateral (H 2) views. M. ZPAL Sc.8/6.6, sample S.Do.6, in right lateral (M 1) and dorsal (M 2) views. N. ZPAL Sc.8/6.7, sample S.Do.6, in left lateral (N 1) and dorsal (N 2) views. O. ZPAL Sc.8/11.13, sample S.Za.12, in left lateral (O 1) and dorsal (O 2) views. I–L. “Kettnerites”? spp. left and right MIV. I. ZPAL Sc.8/7.13, sample S.IZ.18, right element in ventral lateral view. J. ZPAL Sc.8/8.22, sample S.I.Z.13, right element in ventral lateral view. K. ZPAL Sc.8/6.15, sample S.Do.2, left element in dorsal lateral view. L. ZPAL Sc, 8/8.8, sample S.IZ.6, left element in ventral lateral view.