Diadema savignyi
Authors/Creators
Description
Diadema savignyi (Audouin, 1809)
Material studied. WUSL/ER/204 (dry, denuded) from Nilwella; WUSL/ER/209 (dry, denuded) from Hiriketiya. Literature records for Sri Lanka. Clark (1915), Fernando (2006), Jayakody (2012), Gayashan & Jayakody (2012).
Distribution in Sri Lanka. Southern coast of Sri Lanka.
Recorded depth range in Sri Lanka. 0.5– 4 m (present study).
Habitat. Shallow reef areas.
Observed occurrence in this study. Southern coast (Hiriketiya and Nilwella) of Sri Lanka.
Remarks. The test of adult D. savignyi can be distinguished from that of adult D. setosum because the former has up to five primary tubercles in one horizontal series in the interambulacra, and the latter has six to seven. In life, D. savignyi lacks a red ring around the anus, but has bright blue lines around the plates in the apical system, and two paired, thin lines of the same vivid color running down along each interradial suture towards a white, iridescent spot. At this point, the two blue lines diverge to run along the center of each column of interambulacral plates. In D. savignyi, right blue lines can often be seen around the bases of the primary spines.
Clark (1915) reported this species in Sri Lanka for the first time based on two specimens housed at the Colombo Museum. However, no exact locality nor depth records are available. Clark’s collection is no longer available at the Colombo Museum.
Notes
Files
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Linked records
Additional details
Identifiers
Biodiversity
- Scientific name authorship
- Audouin
- Kingdom
- Animalia
- Phylum
- Echinodermata
- Order
- Diadematoida
- Family
- Diadematidae
- Genus
- Diadema
- Species
- savignyi
- Taxon rank
- species
- Taxonomic concept label
- Diadema savignyi (Audouin, 1809) sec. Arachchige, Jayakody, Mooi & Kroh, 2019
References
- Clark, H. L. (1915) The echinoderms of Ceylon other than holothurians. Spolia Zeylanica, 10, 83 - 102.
- Fernando, M. (2006) Coral associated invertebrates: An overview of the current taxonomic status. In: Bambaradeniya, C. N. B. (Ed.), The Fauna of Sri Lanka. Section 3. Status of Marine Fauna in Sri Lanka. IUCN-The World Conservation Union, Gland and Cambridge, pp. 259 - 273.
- Jayakody, S. (2012) Provisional checklist of sea urchins (Echinodermata: Echinoidea) of Sri Lanka. In: Weerakoon, D. K. & Wijesundara, S. (Eds.), The National Red List 2012 of Sri Lanka; Conservation Status of the Fauna and Flora. Ministry of Environment, Colombo, Sri Lanka, pp. 370 - 372.
- Gayashan, M. A. & Jayakody, S. (2012) Diversity and density of sea urchins populations in rocky shores off Nilwella in Southern province of Sri Lanka. Sri Lanka Journal of Aquatic Science, 17, 35 - 46. https: // doi. org / 10.4038 / sljas. v 17 i 0.6854