(Patrick) Potapova 2011 Category: Symmetrical biraphid
BASIONYM: Navicula poconoensis Patrick 1945
Contributor: Marina Potapova - October 2010
Length Range: 17-28 µm
Width Range: 4.9-5.6 µm
Striae in 10 µm: 27-31
Valves are lanceolate with convex margins and subrostrate ends. Striae are slightly radiate throughout the valve, parallel or slightly convergent at the apices, 27-31 in 10 μm. The raphe is absent on one valve. The raphe valve has a narrowly lanceolate axial area and rounded central area expanded to the valve margin on one or both sides. The raphe is almost straight; externally it lies in a shallow furrow. Externally the raphe slits gradually expand towards the center of the valve. The axial area of the rapheless valve is lanceolate and covered by siliceous thickenings.
Basionym: Navicula poconoensis
Author: Patrick 1945
Length Range: 26.4 µm
Width Range: 4.6 µm
Striae in 10 µm: 31
Valvae linearis-lanceolatae 26.4 μ longae, 4.6 μ latae, apicibus late rostratis; area axiali lanceolata, area centrali rotundata; striis 31 in 10 m, in apicibus parallelis.
Patrick, R.M. (1945). A taxonomic and ecological study of some diatoms from the Pocono Plateau and adjacent regions. Farlowia 2(2):143-221.
Potapova, M. (2011). New species and combinations in the genus Nupela from the USA. Diatom Research. 10.1080/0269249X.2011.575111