Oulodus sp.

Waid, Christopher B. T. & Cramer, Bradley D., 2017, Telychian (Llandovery, Silurian) conodonts from the LaPorte City Formation of eastern Iowa, USA (East-Central Iowa Basin) and their implications for global Telychian conodont biostratigraphic correlation, Palaeontologia Electronica 42 (6), pp. 1-37 : 11-12

Oulodus sp. Pa?

1 Pb 1 1 Sc 1 2 2 Sa 2 1 1 Oulodus cf. petilus Sc pacificus

Sb

Pb 1

1 1 Panderodus aeq unicostatus

tort 2 2 1

falc 1 2

grac 1 2 1

trunc 1 1

1

1

3

1

1 1

1 5 1 3 1 2 1

2 4 4 3

3 2 4 18 13 14 1 10 4

1 1 4 1 3 3

arc 1

Panderodus aeq equicostatus

tort 1 1 1 2 2 4 1 1 1

1

1 2 1 1 falc grac 2 2 1

3 2 1 2 1 1

6 11 4 3 4 5 1 12 6 trunc 1? 1? 1 arc 1 1 2 1 1 1 2 2 1 Panderodus panderi falc 1

grac 1

trunc 1

arc

3 2 1 6 4 3

1 1 1 2 2

1 1 1

Panderodus grac 1 greenlandensis

arc 1 1 1

TABLE 1 (continued).

2001 Apsidognathus tuberculatus Walliser ; Rickards, Percival, Simpson, and Wright, fig. 2e.

2003 Apsidognathus tuberculatus Walliser ; Pyle and Barnes, fig. 18.9-18.10.

2010 Apsidognathus tuberculatus Walliser ; Wang and Aldridge, pl. 13, fig. 1 (Pa element; with multielement synonymy through 1999).

Description. Pa elements broad and shield-like in oral view, arched in lateral view. One denticulated blade-like process and one ridge with paired nodes meet in the center of the element at an approximately 160 o angle. Several minor ridges, little more than rows of aligned nodes, extend outwards from the center of the element. Entire platform ornamented by scattered nodes.

Remarks. This orientation of the ridges and style of ornamentation most closely resembles Apsidognathus tuberculatus ssp. n. 3 of Männik (2007a), which is restricted to the Lower Pterospathodus amorphognathoides angulatus Zone.

Material examined. One Pa element.