| Reference no. | Description | year | Name used | Page |
|---|---|---|---|---|
| 109687 | Raghunathan, C. and K. Venkataraman 2014 Status survey of holothurians (sea cucumber) in the territorial waters of Andaman and Nicobar Islands. Zoological Survey of India, Kolkata, 98p. | 2014 | Synallactes rigidus | --> |
| 127697 |
IUCN 2022 The IUCN Red List of Threatened Species. Version 2022-1. |
2022 | Synallactes rigidus | --> |
| 130435 | IUCN 2025 The IUCN Red List of Threatened Species. 1964 - onwards. https://www.iucnredlist.org/ | 2025 | Synallactes rigidus | ver.2025-1 |
| 3477 | MarineSpecies.org 2050 MarineSpecies.org. http://www.marinespecies.org/index.php | 2050 | Synallactes rigidus | --> |