Bibliographic Detail

Siver, P.A., 2002

Reference:
Siver, P.A. (2002). Two new species of Mallomonas (Synurophyceae) from the Ocala National Forest, Florida, USA. Nordic Journal of Botany 22(1): 115-121, 2 figs.

Abstract:
Two new species of Mallomonas, M. binocularis and M. delanciana, are described from small, acidic, poorly buffered waterbodies in the Ocala National Forest, Florida, U.S.A. Both taxa are in the Section Papillosae, consist of relatively small cells covered with domed scales each bearing a single bristle, and have small tripartite scales with a small symmetrically placed dome. Scales of Mallomonas binocularis have shields that are covered with evenly-spaced papillae, two distinctive pores at the base of the V-rib and unornamented flanges. Mallomonas binocularis is most similar to Mallomonas paxillata, M. papillosa, M. rasilis and M. calceolus, but can be distinguished from the latter taxa on the basis of scale structure and bristle morphology. Scales of Mallomonas delanciana have shields with widely spaced papillae, a series of parallel ribs on the anterior flanges that usually continue around the dome, unornamented posterior flanges and lack rimmed pores in the posterior region of the shield. The density of the papillae on the shield, features of the dome and anterior flange, and the structure of bristles, clearly serve to separate M. delanciana from closely related species including M. papillosa, M. calceolus and Mallomonas conspersa.