First Record of Two Crinoid-Associated Brachyuran Crabs (Crustacea: Decapoda: Pilumnidae) from the Arabian Sea, Western
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First Record of Two Crinoid-Associated Brachyuran Crabs (Crustacea: Decapoda: Pilumnidae) from the Arabian Sea, Western Indian Ocean P. C. Mariyambi 1,2 & B. Mohammednoushad 1,2 & K. K. Idreesbabu 1 & S. Sureshkumar 2 Received: 23 September 2019 / Revised: 7 November 2019 / # Springer Nature Switzerland AG 2020
Abstract Two species of crinoids associated crabs of the family Pilumnidae, Permanotus purpureus (Gordon 1934) and Tiaramedon spinosum (Miers 1879) previously recorded from the southwest Pacific in Indonesia, is reported for the first time from the Indian Ocean, which is a significant expansion of their distribution range. We also provide the first documentation of the symbiotic association of T. spinosum with Comatella nigra (Carpenter 1881). Keywords Lakshadweep . Feather star . Symbionts . New record
Introduction Crinoid associates represent an abundant and diverse, but poorly explored, component of coral-reef biodiversity (Britayev and Mekhova 2011).Crinoids are considered as a living substratum, which sustains a microcosm ruled by crinoid-symbiont and symbiont-symbiont interactions (Potts 1915; Clark 1921). Potts (1915) was the first to document the colouration, distribution, and behaviour of crinoid symbionts, followed by the publication of an exhaustive list of symbiotic species (Clark 1921). Permanotus purpureus was described by (Gordon 1934), from Sorong, West Papua and subsequently reported from the Obilatu Island, Indonesia (Buitendijk 1939), Kwajalein Atoll, Marshall Islands, Central Pacific Ocean, (Holthuis 1953), Okinawa, Ryukyu Islands, Japan (Nagai and Nomura 1988), Palau Island, Mariana Islands and Marshall Islands, Central Pacific Ocean, (Castro 1989) and Japan (Takeda and Maramura 1994). Tiaramedon spinosum was described by (Miers 1879) from East seas, Indonesia and subsequently Electronic supplementary material The online version of this article (https://doi.org/10.1007/s41208-020-00197-w) contains supplementary material, which is available to authorized users. * S. Sureshkumar [email protected] 1
Department of Science and Technology, Union Territory of Lakshadweep, Kavaratti 682555, India
2
School of Ocean Science and Technology, Kerala University of Fisheries and Ocean Studies, Panangad, Kochi, Kerala 682506, India
recorded from the Red Sea (Balss 1924; Gordon 1934; Serene 1968; Fishelson 1973), Flores Sea, Indonesia (Flipse 1930), Honshu (Sakai 1938) and Hachijo Islands, Japan (Sakai 1953), South China Sea (Serene et al. 1958), Oshima Island, Japan (Suzuki and Kurata 1967), Maluku Islands, Indonesia, (Serene et al. 1976), Taiwan (Hwang and Yu 1980) and also from Sulawesi, Papua New Guinea, Australia and East Malaysia (Chia and Ng 1998). Both P. purpureus and T. spinosum were re-described by (Chia and Ng 1998). Here, we provide the first record of P. purpureus and T. spinosum from the Indian Ocean, significantly extending the known range of the former by~2000 to 2500 km, and providing an intermediary report of the latter between the Pacific and the Red Sea. Also, we report for th
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