Premium
A UNIQUE COLONIAL MARINE CENTRIC DIATOM, COENOBIODISCUS MURIFORMIS GEN. ET SP. NOV. 1
Author(s) -
Loeblich Alfred R.,
Wight William W.,
Darley W. Marshall
Publication year - 1968
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 - 10.1111/j.1529-8817.1968.tb04672.x
Subject(s) - biology , diatom , colonialism , ecology , evolutionary biology , archaeology , history
SUMMARY A new colonial centric marine diatom , Coenobio‐discus muriformis gen. et sp. nov. (family Coscinodiscaceae) has been found in San Diego Bay, San Diego, California. The colony is composed of a single layer of 200‐530 cells linked girdle to girdle by a compartmentalized matrix. The colony has the shape of a slightly concavo‐convex disk approximately 400 μ. in diameter. Each cell is about 10 μ , in diameter and the valves have many structural features in common with those of Thalassiosira. The organic matrix contains 6‐11 partitions that radiate from each cell, forming a number of extracellular chambers. The organic matrix does not contain chitin or cellulose as a major constituent. Histochemical similarities are found with the capsular and tubular material of previously described diatoms. The colonies reproduce without passing through a unicellular vegetative stage.