Pluckidina robustipegmata, Dzik, 2002

Dzik, Jerzy, 2002, Emergence and collapse of the Frasnian conodont and ammonoid communities in the Holy Cross Mountains, Poland, Acta Palaeontologica Polonica 47 (4), pp. 565-650 : 601

Pluckidina robustipegmata sp. nov.

Fig. 12A–F.

Holotype: P 1 (sp) element ZPAL CXVI/701 ( Fig. 12A).

Type horizon and locality: Mid−Frasnian sample Wtr−5 from Wietrznia II quarry in Kielce.

Derivation of the name: Referring to the robust appearance of the incipient platform that makes a kind of connection (Greek pegma) between the element processes.

Diagnosis.—Mature P 1 (sp) and P 2 (oz) elements tending to develop a narrow platform, M (ne) elements with relatively long inner process.

Remark.—The available material is too small to be sure whether two types of the S 3–4 (ke−hi) series elements are represented or not. Generic attribution is based on the presence of the S 1 (lo) element with strongly bent processes and general morphology of the platform series elements—despite Ligonodina −like morphology of the M (ne) elements, the P 1 (sp) elements are not sinuous.

Distribution.—Mid− and late Frasnian of Wietrznia in the Holy Cross Mountains, Poland (see Table 2 and Fig. 4 ).

Figures

Fig. 4. Correlation of studied sections of the Frasnian in the Holy Cross Mountains, Poland and position of conodont samples and ammonoid−bearing horizons. Note that the complete section of the Płucki main trench (extreme left) is drawn in different scale; samples between Pł−25 and Pł−18 come from small trenches. Above is a map of the Wietrznia quarries with locations of the sampled sections; the basal part of the section, with Ancyrodella soluta, has not been sampled because of low frequency of conodont elements (see Racki 1993); provisional zonation based on other Ancyrodella species is shown. Kowala section was measured at the eastern end of the quarry, the highest exploitation level. A. Wietrznia 1d of Racki et al. (1993; Racki and Bultynck 1993). B. Wietrznia 1e. C. Wietrznia block D of Szulczewski (1989). D. Wietrznia II.