Fromia hemiopla Fisher 1913
- 1. Department of Invertebrate Zoology, National Museum of Natural History, Smithsonian Institution, Washington, D. C. USA
- 2. Fisheries Resources Institute, Japan Fisheries Research and Education Agency, 1 - 5939 - 22 Suido-cho, Chuo, Niigata, Niigata 951 - 8121, Japan
- 3. Department of Zoology, National Museum of Nature and Science, 4 - 1 - 1 Amakubo, Tsukuba, Ibaraki 305 - 0005, Japan
- 4. Okinawa Churaumi Aquarium, 424 Ishikawa, Motobu, Okinawa 905 - 0206, Japan
Description
Fromia hemiopla Fisher 1913
FIGURE 6A–E
Fromia hemiopla Fisher 1913: 214; 1919: 377; A.H. Clark 1952: 286; Marsh & Fromont 2020: 232.
Diagnosis
Body stellate (R/r=2.6–2.8), arms relatively short, disk stout, small, triangular in outline, interradial arcs acute (Fig. 6A). Abactinal plates weakly convex covered by continuous granular cover (Fig. 6C). Superomarginal plates in gradually, regular series with no marginal alternation of sizes (Fig. 6D). Distalmost superomarginals with tubercular granules centrally located on each plate (Fig. 6B, D). Furrow spines, 3 to 4 flat, spatulate, subambulacral spines 2, short and thick, granules similar to actinal granules (Fig. 6E).
Comments
This species closely resembles Fromia milleporella, from which it differs in presence of distinct tubercles or spines on the distalmost marginal plates (Fig. 6B, D), presence of broad-based arms and more numerous abactinal pates across the arm base.
Accessory granules, especially around the armtips have been argued as being being phenotyptically variable (Mortensen, 1925). Phenotypic variation with response to the environment (e.g., wave motion) occurs in the asteriid sea star, Pisaster ochraceus (Hayne & Palmer 2013). It is possible this is a variable character in Fromia hemiopla, and possibly synonymous with Fromia milleporella.
Occurrence
Okinawa, Ryukyu Islands, Japan. 3.0– 52 m.
Fiji, Marshall Islands, Samoa. 3.0–55.0 m
Material Examined
USNM E9721 Okinawa, Ryukyu Islands, Japan. Coll. L.J. Withington, 1960. 4 dry specimens. R=2.0 r=0.6 R=1.9 r=0.6 R=1.7 r=0.5 R=2.1 r=0.5.
USNM E45989 1 km WNW of Onna Village (Horseshoe Cliffs), Okinawa, Ryukyu Islands, Japan. 26.5 127.848, 52.0 m. Coll. R.F. Bolland 24 May 1984. 1 dry spec. R=1.7 r=0.6.
USNM E45994 1.3 km ENE of Maeki-Zaki, Seragaki Beach, Okinawa, Ryukyu Islands, Japan. Walls and floor of surge channel near reef edge, 26.5067, 127.877, 3.0 m. Coll. R.F. Bolland, 25 Oct 1984. 1 dry spec. R=1.3 r=0.5.
USNM E 46008 Reef edge, 1 km WNW of Onna Village, Okinawa, Ryukyu Islands, Japan, 26.5, 127.848, 3–12 m. Coll. R.F. Bolland, 9 Aug 1981. 1 dry spec. R=2.5 r=0.7
Notes
Files
Files
(506 Bytes)
| Name | Size | Download all |
|---|---|---|
|
md5:c742d6a21db4fd841512d1ee4340ecf1
|
506 Bytes | Download |
System files
(26.6 kB)
| Name | Size | Download all |
|---|---|---|
|
md5:a9aa8ecbe0a56b47eaf59b85018c2223
|
26.6 kB | Download |
Linked records
Additional details
Identifiers
Biodiversity
- Collection code
- USNM
- Event date
- 1981-08-09 , 1984-05-24 , 1984-10-25
- Family
- Goniasteridae
- Genus
- Fromia
- Kingdom
- Animalia
- Material sample ID
- USNM E 46008 , USNM E45989 , USNM E45994 , USNM E9721
- Order
- Valvatida
- Phylum
- Echinodermata
- Scientific name authorship
- Fisher
- Species
- hemiopla
- Taxon rank
- species
- Verbatim event date
- 1981-08-09 , 1984-05-24 , 1984-10-25
- Taxonomic concept label
- Fromia hemiopla Fisher, 1913 sec. Mah, Kogure, Fujita & Higashiji, 2024
References
- Fisher, W. K. (1913) New starfishes from the Philippine Islands, Celebes, and the Moluccas. Proceedings of the United States National Museum, 46, 201 - 224. https: // doi. org / 10.5479 / si. 00963801.46 - 2022.201
- Fisher, W. K. (1919) Starfishes of the Philippine seas and adjacent waters. Bulletin of the United States National Museum, 3 (100), 1 - 547, 156 pls.
- Clark, A. H. (1952) Echinoderms from the Marshall Islands. Proceedings of the United States National Museum, 102 (3302), 265 - 303. https: // doi. org / 10.5479 / si. 00963801.102 - 3302.265
- Marsh, L. M. & Fromont, J. (2020) Field Guide to Shallow - Water Seastars of Australia. Western Australian Museum, Welshpool, D. C., 543 pp.
- Mortensen, T. (1925) On some echinoderms from South Africa. Annals and Magazines of Natural History, Series 9, 16 (91), 14 - 154. https: // doi. org / 10.1080 / 00222932508633280
- Hayne, K. J. R. & Palmer, A. R. (2013) Intertidal sea stars (Pisaster ochraceus) alter body shape in response to wave action. Journal of Experimental Biology, 216 (9), 1717 - 1725. https: // doi. org / 10.1242 / jeb. 078964