Affiliation:
1. 1 Department of Geology, University of Georgia, Athens, GA 30602
2. 2 Department of Life & Earth Sciences, Georgia State University, Clarkston, GA 30021
3. 3 Georgia Electron Microscopy, University of Georgia, Athens, GA 30602
4. 4 Department of Environmental Health Sciences, School of Public Health, State University of New York, Rensselaer, NY 12144
Abstract
ABSTRACT
Allogromiids, organic-walled foraminifera, are common members of foraminiferal associations in reef and back-reef settings of the Florida Keys and other locales, and many live in cryptic or otherwise protected microhabitats associated with macroalgae and seagrasses. A new species of Allogromia was isolated from the alga Dasycladus vermicularis (Scopoli) collected from prop-roots of the red mangrove, Rhizophora mangle (Linneaus), in Zane Grey Creek, Long Key, Florida. This species, Allogromia arnoldi n. sp., genetically matches sequences of undescribed and uncharacterized allogromiids deposited in GenBank from Cyprus and Jamaica. Allogromia arnoldi is genetically and morphologically distinct from A. laticollaris Arnold, A. laticollaris strain CSH, A. sp. NF (Lee & Pierce, 1963), environmental DNA sequences of morphologically unknown allogromiids, a number of freshwater forms, and several undescribed marine allogromiids known in the literature by nicknames (e.g., “squatter,” “rubble dome,” “twinkle”). This new species of Allogromia belongs to Clade M of the monothalamid foraminifera. Allogromia arnoldi appears to be broadly distributed, and it is fairly easy to isolate and rear in culture. Individuals typically have bright orange cytoplasm, a variable number of apertures, and can assume a wide range of shapes. Transmission electron microscopy (TEM) following high-pressure freezing and freeze substitution shows that the test has a complex fine structure that varies in thickness. It consists of two layers: a thick inner layer with a “herringbone” fine structure, and a thinner, outer electron-opaque mesh-like layer that occurs in patches. The number of nuclei varies per individual, and the non-reproductive nucleus is morphologically similar to that of many other monothalamid foraminifera.
Subject
Paleontology,Microbiology
Reference46 articles.
1. Observations on gametogenesis in the foraminifer Myxotheca;Angell,;Journal of Foraminiferal Research,1971
2. A new foraminiferan belonging to the genus Allogromia;Arnold,;Transactions of the American Microscopical Society,1948
3. Variation and isomorphism in Allogromia laticollaris: A clue to foraminiferal evolution;Arnold,;Contributions from the Cushman Foundation for Foraminiferal Research,1954
4. Life history and cytology of the foraminiferan Allogromia laticollaris;Arnold,;University of California Publications in Zoology,1955
5. Psammophagasimplora n. gen., n. sp., a polygenomic Californian saccamminid;Arnold,;Journal of Foraminiferal Research,1982
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献