EXPLORING THE INTRICATE MORPHO-ANATOMY OF TONNA DOLIUM (CAENOGASTROPODA: TONNIDAE) FROM THE GULF OF MANNAR, INDIA
AbstractThe study provides a detailed morpho-anatomical description of Tonna dolium (Linnaeus, 1758), a commercially important tonnid gastropod, based on specimens collected from the Gulf of Mannar, India. The research examines the shell characteristics, head-foot morphology, mantle organs, visceral mass, reno-pericardial system, digestive system, reproductive system, and central nervous system of T. dolium through dissections and histological analysis. Key anatomical features are described and illustrated, including the proboscis structure, radula morphology, esophageal glands, and genital systems of both males and females. Comparisons are made with previously studied tonnid species, particularly Tonna galea and Tonna pennata. Notable distinctive features of T. dolium include the narrow gill and osphradium, radularrachidian with two pairs of secondary cusps, and confinement of seminal vesicles within the pallial oviduct. This comprehensive anatomical study contributes to a better understanding of tonnid taxonomy and provides insights into the adaptations of T. dolium for its predatory lifestyle in tropical marine ecosystems.
Article Information
29
1724-1729
2208 KB
67
English
IJPSR
T. Esther Elsie *, Luiz Ricardo L. Simone and R. D. Thilaga
PG and Research Department of Zoology, St. Mary’s College (Autonomous), Thoothukudi, Affiliated to Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli, Tamil Nadu, India.
esinchrist10@gmail.com
20 January 2025
21 May 2025
22 May 2025
10.13040/IJPSR.0975-8232.16(6).1724-29
01 June 2025
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