Post-extinction survivor fauna from the lowermost Famennian of eastern North America Author Day, Jed Author Over, D. Jeffrey text Acta Palaeontologica Polonica 2002 2002-12-31 47 2 189 202 journal article 300554 10.5281/zenodo.13174914 c2009942-e0f2-4d16-b1ef-026cefdf1680 1732-2421 13174914 Chapinella ? sp. Fig. 3G . Material .—One partial ventral valve NYSM 15727, numerous unnumbered valve fragments, one ventral, and one partial dorsal valve (both unnumbered) on parts and counterparts of split slabs. Remarks .—This form is a relatively common element of the HanoverShalefauna,althoughmostfrequentlyrepresentedby broken shell fragments of dorsal and ventral valves. The angular plications bounding the sulcus and upper part of the tongue ( Fig. 3G ) arise anterior of mid−valve, and do not extend posteriorly to near the beak. External ornament preserved on external molds of partial ventral valves shows very fine concentric growth lines and very fine radial microcapillate microornament. It resembles species of Chapinella Savage et al., 1978 , and is provisionally placed in that genus pending recovery of sufficient specimens to verify its identity.