Naxioides robillardi ( Miers, 1882 )

Muñoz, Isabel, García-Isarch, Eva & Cuesta, Jose A., 2021, Annotated and updated checklist of marine crabs (Decapoda: Brachyura) of Mozambique supported by morphological and molecular data from shelf and slope species of the “ MOZAMBIQUE ” surveys, Zootaxa 5056 (1), pp. 1-67 : 29

publication ID	https://doi.org/10.11646/zootaxa.5056.1.1
publication LSID	lsid:zoobank.org:pub:D20A249C-1CA4-45F8-8677-D2011A8380A4
DOI	https://doi.org/10.5281/zenodo.5577766
persistent identifier	https://treatment.plazi.org/id/03D487F8-2138-FFFD-FF71-DC46B970F954
treatment provided by	Plazi (2021-10-19 07:27:05, last updated 2024-11-25 18:47:24)
scientific name	Naxioides robillardi ( Miers, 1882 )
status

Treatment

Naxioides robillardi ( Miers, 1882) View in CoL

( Figure 9B View FIGURE 9 )

Material examined. M07, Stn. 13, 620 m, ♀ 41.6× 51.8mm ( CW × PRL) (IEO-CD-MZ07/1892) , 16S ( MZ 424946 View Materials ) .

Habitat and distribution. Naxioides robillardi is distributed throughout the IWP: Gulf of Oman, East Africa ( Kenya, Somalia), Madagascar, Reunion Island, Mauritius, Solomon, Indonesia, Hong Kong, Philippines, Australia, Japan ( Poupin, 1995) and recently reported from Korea ( Lee et al. 2020). It inhabits hard bottoms between 30 and 260m ( Poupin 1995). Naxioides hirtus A. Milne-Edwards was the only species of Naxioides previously reported in Mozambican waters ( Barnard 1950; Kensley 1981).

Remarks. The keys and descriptions used for the identification of this specimen were Griffin & Tranter (1986a), Miers (1886) and Poupin (1995). Poupin (1995) distinguished two forms of this species: N. robillardi forma t ypica, and N. robillardi forma mammillata, our specimen being coincident with the first. It should be noted that we collected one single female specimen in M07, at 620m depth. The absence of other specimens and the fact that the only one was lacking the chelipeds, made not possible to confirm all the characteristics used for distinguishing both forms. The present specimen is the first record of N. robillardi in Mozambican waters, extending the maximum depth reported for this species up to 620m.

Colouration observed. The carapace was beige and it is covered in short dense yellowish-brown pubescence, with purplish-red spines, similar to that described by Miers (1882). Ambulatory legs were purplish-red, with subtle light and dark bands, almost imperceptible. After preservation in formalin the specimen acquired a homogeneous bone colour, without traces of the purplish-red colour, contrary to the permanence of violet areas in merus and carpus of the ambulatory legs described by Poupin (1995) after preservation in ethanol.

DNA barcodes. There are not 16S sequences available for this species in Genbank, this being the first one. There are three equal COI sequences in Genbank ( MT469872 View Materials , MT469873 View Materials , MT469874 View Materials ) obtained by Lee et al. (2020) from one specimen of N. robillardi from Korea. However , no COI sequence could be reared from the specimen IEO-CD-MZ07/1892 from MZ07 and therefore, comparison is not possible.

References

Barnard, K. H. (1950) Descriptive catalogue of South African Decapod Crustacea (crabs and shrimps). Annals of the South African Museum, 38, 1 - 837.

Griffin, D. J. G. & Tranter, H. A. (1986 a) The Decapoda Brachyura of the Siboga Expedition. Part VIII. Majidae. Siboga Expeditie, 39 (c 4), 1 - 335.

Kensley, B. (1981) On the zoogeography of southern African Decapod Crustacea, with a distributional checklist of the species. Smithsonian Contributions to Zoology, 338, 1 - 64.

Lee, S. - H., Jung, J. & Park, T. (2020) First Record of Indo-West Pacific Spider Crab, Naxioides robillardi (Decapoda: Epialtidae) from Korean Waters. Animal Systematic Evolution and Diversity, 36, 400 - 407. https: // doi. org / 10.5635 / ASED. 2020.36.4.077

Miers, E. J. (1882) On some crustaceans collected at the Mauritius. Proceedings of the Zoological Society of London, 50 (2), 339 - 342. https: // doi. org / 10.1111 / j. 1469 - 7998.1882. tb 06630. x

Miers, E. J. (1886) Report on the Brachyura collected by H. M. S. Challenger during the years 1873 - 1876. In: Thompson, C. W. & Murray, J. (Eds.), Report on the Scientific Results of the Voyage of H. M. S. Challenger During the Years 1873 - 1876, Zoology, 17. Neill and Company, Edinburg, pp. 1 - 362.

Poupin, J. (1995) Etude des Naxioides du groupe robillardi (Miers, 1882) (Brachyura: Majidae; Pisinae). Journal of Natural History, 29 (1), 85 - 109. https: // doi. org / 10.1080 / 00222939500770051

Figures

FIGURE 9. A, Oxypleurodon difficilis, ♂ IEO-CD-MZ08/1774; B, Naxioides robillardi, ♀ IEO-CD-MZ07/1892; C, Samadinia galathea, ♂ IEO-CD-MZ09/1802-1; D, Samadinia pulchra, ♂ IEO-CD-MZ07/1893; E,F, Cyrtomaia gaillardi, ♂ IEO-CD- MZ08/1788; G, Platymaia alcocki, ♂ IEO-CD-MZ08/1789. Scale bars: 1cm.