Morphology and systematics of Sciurothamnion stegengae gen. et sp. nov. (Ceramiaceae, Rhodophyta) from the Indo-Pacific
De Clerck, O.; Kraft, G. T.; Coppejans, E. (2002). Morphology and systematics of Sciurothamnion stegengae gen. et sp. nov. (Ceramiaceae, Rhodophyta) from the Indo-Pacific. J. Phycol. 38(6): 1176-1189. dx.doi.org/10.1046/j.1529-8817.2002.01247.x In: Journal of Phycology. Blackwell Science: New York. ISSN 0022-3646; e-ISSN 1529-8817, more |  |
| Keywords | Anatomical structures > Body organs > Plant organs > Plant reproductive structures
Biology > Organism morphology > Plant morphology
Cell constituents > Nuclei
Classification > Taxonomy
Developmental stages
Fertilization
Flora > Weeds > Marine organisms > Seaweeds
Reproduction > Sexual reproduction
Reproduction > Sexual reproduction > Fertilization
Taxa > New taxa > New genera
Taxa > Species > New taxa > New species
Algae; Callithamnieae Schmitz, 1889 [WoRMS]; Ceramiaceae Dumortier, 1822 [WoRMS]; Rhodophyta [WoRMS]; Sciurothamnion De Clerck & Kraft, 2002 [WoRMS]; Sciurothamnion stegengae De Clerck & Kraft, 2002 [WoRMS]
ISW, West Indian Ocean [Marine Regions]
Marine/Coastal | | Author keywords | algae; Ceramiaceae; cytology; morphology; Rhodophyta; Sciurothamnion gen. nov.; Sciurothamnion stegengae sp. nov.; systematics; taxonomy |
| Authors | | Top | - De Clerck, O., more
- Kraft, G. T.
- Coppejans, E., more
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| Abstract | A new ceramiaceous alga, Sciurothamnion stegengae De Clerck et Kraft, gen. et sp. nov., is described from the western Indian Ocean and the Philippines. Sciurothamnion appears related to the tribe Callithamnieae on the basis of the position and composition of its procarps and by the majority of post-fertilization events. It differs, however, from all current members of the tribe by the presence of two periaxial cells bearing determinate laterals per axial cell. Additionally, unlike any present representative of the subfamily Callithamnioideae, no intercalary foot cell is formed after diploidization of the paired auxiliary cells. The genus is characterized by a terminal foot cell (“disposal cell”), which segregates the haploid nuclei of the diploidized auxiliary cell from the diploid zygote nucleus. The nature of three types of foot cells reported in the Ceramiaceae (intercalary foot cells containing only haploid nuclei, intercalary foot cells containing haploid nuclei and a diploid nucleus, and terminal foot cells containing only haploid nuclei) is discussed. |
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