Daily Decay (8th March 2018)

Daily Decay (8th March 2018): Noble Volute (Cymbiola nobilis) @ Pulau Ubin

This shell of a Noble Volute was found on the ground some distance away from the sea. It was likely left there by a person.

Spiral Melongena (Volegalea cochlidium)
Coney Island (Pulau Serangoon), 1st May 2017

This species was classified under the genus Pugilina up until very recently, which is why most references still list the Spiral Melongena as Pugilina cochlidium.

Noble Volute (Cymbiola nobilis)
Pulau Sekudu, 6th July 2016

Ternate False Fusus (Hemifusus ternatanus)
Sembawang, 11th November 2015

Spiral Melongena (Volegalea cochlidium)
Cyrene Reef, 16th August 2015

This species was classified under the genus Pugilina up until very recently, which is why most references still list the Spiral Melongena as Pugilina cochlidium.

Photograph by Toh Chay Hoon

New record of auger shell, Triplostephanus triseriatus, in Singapore

Location, date and time: Singapore Strait, off Pulau Hantu; 26 July 2015; around 1000 hrs.

Observation: An empty shell measuring 57.4 mm in shell length was found on the seabed during a dive. The shell was collected and deposited as a voucher specimen in the Zoological Reference Collection (ZRC) of the Lee Kong Chian Natural History Museum, at the National University of Singapore.

Remarks: The shell is slightly damaged; missing the apical whorls and nearly a quarter of the last part of the body whorl. This find represents the first published record of Triplostephanus triseriatus in Singapore waters. The species can be found throughout much of the tropical Indo-Pacific (Bratcher & Cernohorsky, 1987; Terryn, 2007).

Members of the family Terebridae appear to be seldom encountered and rarely
reported in Singapore. Thus far justover half a dozen species have been recorded (e.g., Tan & Woo, 2010 and references therein cited; unpublished
data). Further sampling and studies are therefore needed to provide a more accurate account of the species diversity of this family in Singapore waters.

References:

  • Bratcher, T. & W. O. Cernohorsky, 1987. Living Terebras of the World: A Monograph of the Recent Terebridae of the world. American Malacologists, Melbourne. 240 pp.
  • Tan S. K. & H. P. M. Woo, 2010. A Preliminary Checklist of the Molluscs of Singapore. Raffles Museum of Biodiversity Research, National University of Singapore. 78 pp.
  • Terryn, Y., 2007. A Collectors Guide to Recent Terebridae (Mollusca: Neogastropoda). ConchBooks/Natural Art, Hackenheim. 57 pp. + 65 pls.

Source: Singapore Biodiversity Records 2015: 126

Photograph by Toh Chay Hoon

Marbled Cone Snail (Conus marmoreus) at Pulau Hantu

Location, date and time: Singapore Straits, patch reef off western Pulau Hantu; 30 August 2014; 1115 hrs.

Observation: An empty shell of about 8cm shell length was found half-buried in the substrate. The contributor had exposed the shell to obtain the accompanying picture.

Remarks: The featured example appears to have died recently as the colour pattern on the shell is relatively distinct, and the surfaces, except for the rear end, were not eroded. This appears to be the second published record of the genus Conus, and the first confirmed record of Conus marmoreus, in Singapore since the 1960s (see Toh et al., 2014; Lim, 1969). This species has been depicted on a series of Singapore postage stamps on marine life that was issued in 1977.

References:

  • Lim C. F., 1969. Further new records and the distribution of Conus Linnaeus in Singapore and the Malay Peninsula. Journal of the Singapore National Academy of Science. 1 (2):45–50.
  • Toh C. H., S. K. Tan & M. E. Y. Low, 2014. Cone snail Conus recluzianus at Lazarus Island. Singapore Biodiversity Records. 2014: 135-136.

Source: Singapore Biodiversity Records 2014: 256