Bergstroemognathus kirki Stait & Druce, 1993

Zhen, Yong Yi, Percival, Ian G. & Webby, Barry D., 2003, Early Ordovician Conodonts from Far Western New South Wales, Australia, Records of the Australian Museum 55 (2), pp. 169-220 : 184

Bergstroemognathus kirki Stait & Druce, 1993

Fig. 8A–J

Bergstroemognathus extensus (Graves & Ellison) .– Cooper, 1981: 161, pl. 31, fig. 12, pl. 32, figs. 9–11, non fig. 7.

Bergstroemognathus kirki Stait & Druce, 1993: 302–303 , figs. 12H, 16D,F–H,J.

Bergstroemognathus kirki .– Zhen et al., 2001: 201–204, figs. 4.14– 4.20, 8.1?, 8.2–8.22.

Material. Five specimens (1 M, 4 Sc) from limestone nodules within shales of the upper Yandaminta Quartzite, and 26 specimens (4 Pa, 6 Pb, 4 Sa, 8 Sb, 3 Sc, 1 Sd) from the overlying Tabita Formation at Mount Arrowsmith ; seven specimens (2 Pb, 3 Sa, 1 Sb, 1 Sc) from unnamed dolomitic limestone unit at Koonenberry Gap .

Remarks. A septimembrate apparatus of B. kirki has been recognized, based on material from the Horn Valley Siltstone of the Amadeus Basin ( Zhen et al., 2001). The western New South Wales material has the same apparatus composition.

Figures

Fig. 8. A–J, Bergstroemognathus kirki Stait & Druce, 1993: A, Pa element, AMF120307, M/A11-3, outer lateral view; B, Pb element, AMF120308, M/A11-3, outer lateral view; C, Pb element, AMF120309, M/A11-3, inner lateral view; D, M element, AMF120310, M/ A11-3, posterior view; E, Sa element, AMF120311, Y4–4, posterior view; F, Sa element, AMF120212, Y4–4, anterior view; G, Sb element, AMF120313, Y4–4, posterior view; H, Sc element, AMF120314, M/A11-3, posterior view; I, Sc element, AMF120315, M/ A11-3, anterior view; J, Sd element, AMF120316, M/A11-4, anterior view. K,L, Ansella jemtlandica (Löfgren, 1978): K, Sa element, AMF120317, M/A7, lateral view; L, Sa element, AMF120318, C1612, lateral view. M–Q, Acodus sp.: M–O, septicostae element, AMF120305, M/A11-3, lateral view; P, septicostae element,AMF120304, M/A11-3, lateral view; Q, quadricostae element,AMF120306, M/A11-3, lateral view. Scale bars 100 µm.