Brongniartella sp.

Sandford, Andrew C., 2005, Homalonotid trilobites from the Silurian and Lower Devonian of south-eastern Australia and New Zealand (Arthropoda: Trilobita: Homalonotidae), Memoirs of Museum Victoria 62 (1), pp. 1-66 : 21

Brongniartella sp.

Trimerus sp. — Holloway and Sandford, 1993: 93, fig. 4L, non figs

4C-D, 4F-G, 4I-J, 4N-P.

Material. NMV P137228 (pygidium, figured Holloway and Sandford, 1993: fig. 4L) from PL 359, Tiger Range, northwest of Maydena, Tasmania. For locality see Holloway and Sandford: fig. 1.

Stratigraphic distribution. Richea Siltstone, Monograptus griestoniensis-M. crenulata biozones, upper Llandovery.

Notes. The elongate, rounded parabolic outline of the pygidium, the strongly raised, narrow, convex pygidial axis and the indication of a distinct border suggest assignment to Brongniartella . The concave sides of the axis is shared with other species of Brongniartella . The species is a late appearance for Brongniartella , a predominantly Upper Ordovician genus but known to extend into the Lower Llandovery atavuscyphus? biozones in Britain ( Temple, 1975) and also recorded from the Lower Llandovery of Jordan ( Wolfart et al., 1968). The Upper Llandovery Tasmanian record narrows the gap between Lower Llandovery Brongniartella and the youngest known species, B. pamiricus ( Balashova, 1966) from the Wenlock of Pamir, central Asia.