Karunarathne, K. D.; Amaya, H.; Digamadulla, D.; De Croos, M. (2024). Redescription of the commercially harvested jellyfish, Crambionella orsini and Lobonemoides gracilis (Cnidaria: Scyphozoa) from Sri Lanka. Marine Biology Research. 1-18.

493406

10.1080/17451000.2024.2371322 [view]

Karunarathne, K. D.; Amaya, H.; Digamadulla, D.; De Croos, M.

2024

1-18

Publication

Two types of edible jellyfish, namely ‘ball-type’ and ‘white-type’, were reported to be commercially harvested respectively from the southeast and northwest coasts of Sri Lanka, but their taxonomic identity was unknown. Therefore, medusae collected in the ‘Waya-jel- Survey’, together with specimens from museums, were examined, comparing their morphomeristic data with information from the literature. As per results, the ‘ball-type’ and ‘white-type’ jellyfish species were recognized respectively as Crambionella orsini (Vanhöffen 1888) and Lobonemoides gracilis Light 1914 for the first time from Sri Lanka, with a detailed account of morphological features. Among the four valid species of the genus Crambionella, C. orsini is distinguished by the presence of 16 velar lappets per octant, without tubercles. The two congeners of L. gracilis, namely L. robustus Stiasny 1920 and L. sewelli Rao 1931, were synonymized to L. gracilis, making Lobonemoides monospecific, thus L. gracilis is recognized by the presence of papillae on the exumbrella; 1–6 elongated velar lappets between two successive rhopalia; and the window-like openings and long, spindle-shaped appendages on the oral arms. Likewise, the present study re-describes C. orsini and L. gracilis providing a basic component for efficient management of jellyfish fishery resources in Sri Lanka as well as in other Asian countries.

Indian Ocean, Western

Scyphozoa

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