Plagiotropis
Pfitzer 1871 Category: Symmetrical biraphid
TYPE SPECIES: Plagiotropis baltica Pfitzer
CLASS: Bacillariophyceae
ORDER: Naviculales
FAMILY: Plagiotropidaceae
- Valves lanceolate, poles narrow to pointed
- Valve face folded, forming prominent apical "lines" on either side of the raphe
- Raphe raised and positioned within a keel
The valve margins of Plagiotropis are lanceolate with narrow poles. The valve face is folded, with folds appearing as lines on either side of the raphe. The raphe itself is raised above the valve face and positioned within a keel. The axial area is narrow and the central area is variable in shape. Striae are parallel and composed of loculate areolae. In girdle view, cells appear constricted in the center.
Plagiotropis is an epipelic genus of brackish waters.
Cite This Page:
Spaulding, S., and Edlund, M. (2009). Plagiotropis. In Diatoms of the United States. Retrieved May 21, 2013, from http://westerndiatoms.colorado.edu/taxa/genus/Plagiotropis
Contributor: Sarah Spaulding | Mark Edlund - January 2009
Reviewer: Sam Rushforth
Citations
Czarnecki, D.B. and Blinn, D.W. (1977). Diatoms of lower Lake Powell and vicinity: diatoms of Southwest US I. Bibilotheca Phycologica 28: 1-119.
Paddock, T.B.B. (1988). Plagiotropis Pfitzer and Tropidoneis Cleve, a summary account. Bibliotheca Diatomologica (H. Lange-Bertalot, ed.). Vol. 16. J. Cramer, Berlin, 152 pp. .
Patrick, R.M. and Reimer, C.W. (1975). The Diatoms of the United States, exclusive of Alaska and Hawaii, V. 2. Monographs of the Academy of Natural Sciences of Philadelphia 13.