Atractomorpha (alga)
| Atractomorpha | |
|---|---|
| Scientific classification File:OOjs UI icon edit-ltr.svg | |
| Clade: | Viridiplantae |
| Division: | Chlorophyta |
| Class: | Chlorophyceae |
| Order: | Sphaeropleales |
| Family: | Sphaeropleaceae |
| Genus: | Atractomorpha L.R.Hoffman |
| Type species | |
| Atractomorpha echinata L.R.Hoffman[1]
| |
| Species | |
Atractomorpha is a genus in the Sphaeropleaceae, a family of green algae.[2] The genus name is derived from Greek and means "spindle-shaped" or "arrow-shaped",[3] and refers to the shape of the cells.[4]
Description
Atractomorpha consists of solitary cells. Cells are variable in size, but range from 25 μm to 6 mm in length. They are usually spindle-shaped, with two sharply pointed ends, but sometimes may develop three- or four-pointed cells. Cells are initially uninucleate (with one cell nucleus), but as the cell develops it becomes multinucleate; the cytoplasm is separated by large vacuoles into zones each containing chloroplasts and nuclei. Chloroplasts are ring-shaped bands or diffusely net-like.[4] Two species of Atractomorpha are known, Atractomorpha echinata and Atractomorpha porcata. The two present similar vegetative cells, but can be distinguished by their reproductive characteristics. Individual cells of A. echinata typically produce either male or female gametes but not both, while cells A. porcata produces both male and female gametes.[5] Additionally, A. echinata is typically anisogamous while A. porcata is typically oogamous, and their zygote walls have different ornamentations.[5]
Habitat
Atractomorpha has been recorded only a few times, mainly from soil isolates.[4] It occurs in shallow, temporary freshwater pools, and has been recorded from California, Texas, Australia, Namibia,[1] and Hungary.[6]
References
- ↑ 1.0 1.1 Cite error: Invalid
<ref>tag; no text was provided for refs namedAlgaeBase - ↑ See the NCBI webpage on Atractomorpha. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. Retrieved 2007-03-19.
- ↑ Jaeger, Edmund C. (1959). A source-book of biological names and terms. Springfield, Ill: Thomas. ISBN 0-398-06179-3.
- ↑ 4.0 4.1 4.2 Hoffman, Larry R. (1983). "Atractomorpha echinata gen. et sp. nov., a new anisogamous member of the Sphaeropleaceae (Chlorophyceae)". Journal of Phycology. 19 (1): 76–86. Bibcode:1983JPcgy..19...76H. doi:10.1111/j.0022-3646.1983.00076.x. S2CID 83546430.
- ↑ 5.0 5.1 Hoffman, Larry R. (1984). "Atractomorpha porcata sp. nov., a new membr of the Sphaeropleaceae (Chlorophyceae) from California". Journal of Phycology. 20 (2): 225–236. Bibcode:1984JPcgy..20..225H. doi:10.1111/j.0022-3646.1984.00225.x. S2CID 84583201.
- ↑ Schmidt, A.; Fehér, G.; Padisák, J. (2003). "Some rare green algae occurring in the Danube river and its dead-and side-branches in southern Hungary". Biologia, Bratislava. 58 (4): 475–481.
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