Nupela poconoensis
(Patrick) Potapova 2011 Category: Symmetrical biraphid
BASIONYM: Navicula poconoensis Patrick 1945
LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Marina Potapova - October 2010
Length Range: 17-28 µm
Width Range: 4.9-5.6 µm
Striae in 10 µm: 27-31
Description
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.
Original Description
Basionym: Navicula poconoensis
Author: Patrick 1945
Length Range: 26.4 µm
Width Range: 4.6 µm
Striae in 10 µm: 31
Original Description
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.
Original Images
Cite This Page:
Potapova, M. (2010). Nupela poconoensis. In Diatoms of the United States. Retrieved May 22, 2013, from http://westerndiatoms.colorado.edu/taxa/species/nupela_poconoensis
Species: Nupela poconoensis
Contributor: Marina Potapova
Reviewer: Sarah Spaulding
Image Credit: Marina Potapova
- Valves lanceolate
- Raphe absent on one valve
- Striae 27-31 in 10 μm
- Axial areas lanceolate
- Central area on raphe valve round
Valves are lanceolate with 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 of the valves. The raphe valve has a narrowly lanceolate axial area and round central area expanded to the valve margin on one or both sides. The axial area of the rapheless valve is lanceolate.
Compare
Nupela poconoensis differs from N. pennsylvanica by lanceolate valves with convex margins. Nupela pennsylvanica has parallel or concave valve margins.
Nupela pennsylvanica
Citations
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
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
North American Diatom Ecological Database (NADED)
NADED ID: