Zieglerodina mashkovae ( Drygant, 1984 )

Drygant, Daniel & Szaniawski, Hubert, 2012, Lochkovian conodonts from Podolia, Ukraine, and their stratigraphic significance, Acta Palaeontologica Polonica 57 (4), pp. 833-861 : 854

Zieglerodina mashkovae ( Drygant, 1984)

Figs. 12U, 13G, K.

1971 Spathognathodus sp. nov.; Mashkova 1971: pl. 3: 11, 14.

1979 Ozarkodina remscheidensis remscheidensis (Ziegler) ; Lane and Ormiston 1979: pl. 1: 18, 34 [only].

1984 Spathognathodus mashkovae sp. n.; Drygant 1984: 125, pl. 14: 10, 11, 13–21 [non 12 = Pandorinellina? formosa Drygant ].

1994 Ozarkodina eladioi n. sp; Valenzuela−Ríos 1994: 59, pl. 5: 1–35.

2010 Zieglerodina mashkovae (Drygant) ; Drygant 2010: 53, pl. 1: 18–20.

Material.—About 290 complete Pa elements from Khudykivtsi, Chortkiv and lower part of Ivanye Formation. Sections and samples: 16/1v, 18/5, 5d, 5e, 6, 6b, 13/1, 1v, 1d, 13A/1, 2, 11/4, 11A/6, 7/4v, 13, 4/8v, 2/4a, 45/180 and 190 m.

Remarks.—Pa elements of the species characterize short (0.6–0.7 mm) and low (about 0.2 mm) blade with straight lower and upper margins. Basal cavity with circular, symmetrical lips located approximately at mid−length or slightly closer to the posterior end of the lower margin. Each section of the blade possesses 5–7 low, nearly equal in height, denticles which on the posterior blade get wider and slightly inclined backwardly. The denticle above the basal cavity (cusp) is considerably bigger, inclined backwardly or erect.

Pa elements differ from the ancestral species Zieglerodina remscheidensis ( Ziegler, 1960) , Z. repetitor ( Carls and Gandl, 1969) , and Z. serrula ( Drygant, 1984) by short, but high blade, bigger size of cusp, different width of denticles of the anterior and posterior section of the blade and location of the basal cavity at the mid−length.

Specimens described by Valenzuela−Ríos (1994: 59, pl. 5: 1–35) as the new species Ozarkodina eladioi do not differ significantly in morphology and stratigraphic range from Zieglerodina mashkovae ( Drygant, 1984) and are, in our opinion, conspecific with the latter.

Stratigraphic and geographic range.—From upper part of Caudicriodus hesperius Zone to C. serus Zone in Podolia, lower to middle Lochkovian in Pirenees, Iberian Chains, Guadarrama Mountains ( Spain).