Anacystis minutissima N.L.Gardner

• Region

  West Indies

• Country

  Puerto Rico

• Locality

  seven km east of Coamo, on rocks

• Coordinates

  18.0799, -66.2953

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

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DARIUS OGDEN MILLS FUND

FRESHWATER ALGAE OF PORTO RICO
COLLECTED BY N. L. BRITTON
Mountains, Cabo Rojo to San German febrl

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'	DARIUS OGDEN MILLS FUND

TANLCAL FRESH WATER ALGAE OF PORTO RICO
COLLECTED BY PROFESSOR N. WILLE
Seven km. east of Coamo March 20, 1915

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Anacystis minutissima sp. nov.

Plate 5, figure 46

Colonies spherical to somewhat irregular in outline, 15-25 m
(up to 45 m) diam.; cells densely crowded together, 0.8-1,2 p
diam., pale aeruginous, often tinged with yellow; tegument thin,
homogeneous, close-fitting, hyaline.

Growing in association with other Myxophyceae among moss
on a water pipe near a stream, Maricao, no. 1194 a, type; on tree
trunks, Coamo Springs, no. 300 d; on a wall at a bridge in Ca-
guas, vo. 462', on broken rock about seven kilometers east of
Coamo, no. 1S69 e; on a wall at Hot Springs, no. 402 b; in the
overflow from a hot opening, Coamo Springs, no. 402 b; on a
brick wail near Juan Martin, Fajardo, no. 732 a; in the overflow
from a hot spring, Coamo Springs, no. 367 e.

The specimens of this species of Anacystis are almost per-
fect spheres when young, and for the most part retain the
shape to maturity. Apparently the resting spores merely de-
velop a very thin, smooth wall at maturity. The species seems
closely related to A. firma (Breb. & Lenorm.) Schmidle, but does
not form the firm, mucous stratum characteristic of that species.
There is also much less variation in the size of the cells.

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Determined by Francis Driîîet and William A. Daily

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