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Morpho-taxonomic analysis of Onchidium stuxbergii (Westerlund, 1883) and Onchidium melakense (Dayrat & Goulding, 2019) (Mollusca: Gastropoda: Onchidiidae) from the Karachi coast, Northern Arabian Sea
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A. Naz Khatib   , F.S. Ghory * |
| Karachi University |
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Abstract: (48 Views) |
The genus Onchidium (Onchidiidae) is typically associated with mangrove swamps and intertidal mudflats. Species of this genus are readily recognized in the field by two diagnostic features: large conical papillae on the dorsal notum and long, slender ocular tentacles (Dayrat et al., 2019). Unlike related gastropods, Onchidium lacks dorsal branchial gills but bears eye spots on the dorsal papillae.
In this study, a morpho-taxonomic examination was conducted on two species, Onchidium stuxbergii (Westerlund, 1883) and Onchidium melakense (Dayrat & Goulding, 2019), collected from the Karachi coast, Northern Arabian Sea. This investigation represents the first taxonomic record of Onchidium species from this region, thereby contributing new insights into the distribution and morphological variation of the genus. |
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| Keywords: Taxonomy, Onchidium stuxbergii, Onchidium melakense, Gastropoda, Onchidiidae, Karachi coast, Northern Arabian Sea |
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Full-Text [PDF 481 kb]
(13 Downloads)
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Type of Study: Research |
Subject:
General
Received: 2025/09/4 | Accepted: 2026/03/30
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