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PREDAEA LUCESCENS SP. NOV., A NEW COOL‐TEMPERATE AUSTRALIAN SPECIES WITH UNIQUE, UNDIFFERENTIATED NUTRITIVE FILAMENTS
Author(s) -
Saunders G.W.,
Kraft G.T.
Publication year - 2000
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1046/j.1529-8817.1999.00001-179.x
Subject(s) - gigartinales , biology , genus , temperate climate , subtropics , gametophyte , botany , phylogenetic tree , range (aeronautics) , zoology , ecology , algae , pollen , genetics , materials science , gene , composite material
The red algal genus Predaea (Schizymeniaceae, Gigartinales) includes approximately a dozen species of tropical and subtropical distribution. Plants are gelatinous in consistency, and the carpogonial branches and auxiliary cells are widely separated in female gametophytes (non‐procarpy). Predaea is distinguished from other red algal genera in possessing clusters of small rounded nutritive cells that are borne on the one proximal and distal two cells directly attached to the auxiliary cell. We describe a new species from cool‐temperate (10–18° C yearly range) southeastern Australia that, unlike the tropical and subtropical species, lacks the typical gelatinous texture and has dwarf vegetative filaments of normally contoured cells associated with the auxiliary cell rather than small clusters of spherical nutritive cells. Anatomical and molecular data are combined to postulate the phylogenetic affinities of the new species to others of the genus, to highlight relationships of Predaea to other genera of the Schizymeniaceae, and to consider this family relative to others now placed in the Gigartinales.