Study Identifies New Marine Amphipod Species in Chilika Lake

• 18 Dec 2023

A groundbreaking discovery unfolded as researchers from Berhampur University, Odisha, unveiled a new species of marine amphipod—shrimp-like crustacea belonging to the Demaorchestia genus—in the Chilika lake on India's east coast.

Key Points

• Demaorchestia alanensis: The newly discovered marine amphipod species is christened Demaorchestia alanensis, named in honour of global amphipod expert Professor Alan Myers from University College Cork, Ireland.
• Genus Expansion: This discovery contributes an additional species, Demaorchestia alanensis, to the Demaorchestia genus, elevating the global count of recognized species within the group to six.
• Collection and Study: Researchers collected eight specimens of Demaorchestia alanensis from Barkul beach in Ganjam district, Odisha, in January 2022.
• Distinctive Features: Demaorchestia alanensis, measuring less than 15 millimeters in length, boasts 13 pairs of legs. Its unique characteristics include white coloration, three pairs of legs for swimming, eight pairs for walking on land, and two pairs for capturing prey and feeding.
• Taxonomic Identification: The new species is identified by two to three hair-like structures on the anterior margin of the gnathopod's propodus, placing it in the subfamily Platorchestiinae.
• Ecological Significance: Amphipods, including this newly discovered species, play a crucial role in the marine ecosystem and serve as indicators for studying climate change impact and coastal ecosystem health.
• Future Research Focus: Further research will delve into understanding the specific ecological roles of amphipods in coastal and marine environments, contributing to a deeper comprehension of their significance.
• Talitridae Family: The Talitridae family, considered one of the oldest groups of amphipods, has representation in India through the subfamilies Talitrinae and Floresorchestiinae.
• Previous Discoveries: The researchers had previously discovered two marine amphipods, Quadrivisio chilikensis and Talorchestia buensis, showcasing the rich biodiversity in different coastal regions.