Abstract
The chirostyloidean squat lobster genus Gastroptychus Caullery, 1896 is revised and is split into two genera: Gastroptychus sensu stricto (type species, Ptychogaster spinifer A. Milne-Edwards, 1880) and Sternostylus new genus (type species, Ptychogaster formosus Filhol, 1884). Gastroptychus sensu stricto, is restricted to nine species with a sternal plastron, at sternite 3, abruptly demarcated from the preceding sternites (excavated sternum) by a distinct step forming a well-defined transverse or concave anterior margin at the articulation with maxillipeds 3, the maxillipeds 3 widely separated, with the distal parts accommodated in the excavated sternum between the left and right maxillipeds 3 when folded, and the P2–4 dactyli with the terminal spine demarcated by a suture. Sternostylus new genus, represented by 12 species, has the sternite 3 anteriorly bluntly produced medially and steeply sloping anterodorsally to the anterior sternite, with a pair of spines directly behind the anterior margin, the left and right maxillipeds 3 adjacent, and the P2–4 dactyli ending in an indistinctly demarcated corneous spine. The above-mentioned characters of Gastroptychus are consistent with Chirostylidae sensu stricto. Published molecular phylogenies indicate, however, that Sternostylus is the sister group to all the other Chirostylidae, and is designated the type genus of a new family, Sternostylidae.
References
Ahyong, S.T. & Poore, G.C.B. (2004) The Chirostylidae of southern Australia (Crustacea: Decapoda: Anomura). Zootaxa, 436, 1–88.
https://doi.org/10.11646/zootaxa.436.1.1Ahyong, S.T., Schnabel, K.E. & Maas, E. (2009) Anomuran phylogeny: new insights from molecular data. In: Martin, J.W., Crandall, K.A. & Felder, D.L. (Eds.), Decapod Crustacean Phylogenetics. Crustacean Issues. Vol. 18. CRC Press, Boca Raton, pp. 399–414.
Ahyong, S.T., Schnabel, K.E. & Macpherson, E. (2011) Phylogeny and fossil record of marine squat lobsters. In: Poore, G.C.B., Ahyong, S.T. & Taylor, J. (Eds.), The Biology of Squat Lobsters. CSIRO Publishing, Melbourne, and CRC Press, Boca Raton, pp. 73–104.
Alcock, A. (1901) A descriptive catalogue of the Indian deep-sea Crustacea Decapoda Macrura and Anomala, in the Indian Museum. Being a revised account of the deep-sea species collected by the Royal Indian Marine Survey Ship Investigator. Trustees of the Indian Museum, Calcutta, 286 pp., 3 pls.
Alcock, A. & Anderson, A.R.S. (1899) Natural history notes from H.M. Royal Indian marine survey ship Investigator, commander T.H. Heming, R.N., commanding.—Series III, No. 2. An account of the deep-sea Crustacea dredged during the surveying season of 1897–98. Annals and Magazine of Natural History, Series 7, 3, 1–27.
Baba, K. (1974) Four new species of galatheidean Crustacea from New Zealand waters. Journal of the Royal Society of New Zealand, 4, 381–393.
https://doi.org/10.1080/03036758.1974.10419382Baba, K. (1977a) Five new species of chirostylid crustaceans (Decapoda, Anomura) from off Midway Island. Bulletin of the National Science Museum, Tokyo, Series A (Zoology), 3, 141–156.
Baba, K. (1977b) Gastroptychus cavimurus sp. nov., a new chirostylid (Crustacea, Decapoda, Anomura) from off the western coast of South America. Zoologische Mededelingen, Leiden, 52, 201–207.
Baba, K. (1986a) Two new species of anomuran crustaceans (Decapoda: Chirostylidae and Galatheidae) from the Andaman Sea. Journal of Crustacean Biology, 6, 625–632.
https://doi.org/10.2307/1548197Baba, K. (1986b) Two new anomuran Crustacea (Decapoda: Anomura) from North-West Australia. The Beagle, 3, 1–5.
Baba, K. (1990) Chirostylid and Galatheid crustaceans of Madagascar (Decapoda: Anomura). Bulletin du Muséum national d’Histoire naturelle, Série 4, Section A (1989), 11, 921–975.
Baba, K. (1991) Crustacea Decapoda: Chirostylus Ortmann, 1892, and Gastroptychus Caullery, 1896 (Chirostylidae) from New Caledonia. In: Crosnier, A. (Ed.), Résultats des Campagnes MUSORSTOM. Vol. 9. Mémoires du Muséum National d’Histoire Naturelle, Paris (A), 152, pp. 463–477.
Baba, K. (2000) Two new species of chirostylids (Decapoda: Anomura: Chirostylidae) from Tasmania. Journal of Crustacean Biology, 20 (Special Number 2), 246–252.
https://doi.org/10.1163/1937240X-90000026Baba, K. (2004) Uroptychodes, new genus of Chirostylidae (Crustacea: Decapoda: Anomura), with description of three new species. Scientia Marina, 68, 97–116.
https://doi.org/10.3989/scimar.2004.68n197Baba, K. (2005) Deep-sea chirostylid and galatheid crustaceans (Decapoda: Anomura) from the Indo-West Pacific, with a list of species. Galathea Report, 20, 1–317.
Baba, K. (2018) Chirostylidae of the Western and Central Pacific: Uroptychus and a new genus (Crustacea: Decapoda: Anomura). In: Tropical Deep-Sea Benthos. Vol. 30. Mémoires du Muséum National d’Histoire Naturelle, Paris, 212, pp. 1–612.
Baba, K. & Haig, J. (1990) A new species of chirostylid crustacean (Decapoda: Anomura) from off the west coast of North America. Proceedings of the Biological Society of Washington, 103, 854–860.
Baba, K., Ahyong, S.T. & Macpherson, E. (2011) Morphology of marine squat lobsters. In: Poore, G.C.B., Ahyong, S.T. & Taylor, J. (Eds.), The Biology of Squat Lobsters. CSIRO Publishing, Melbourne, and CRC Press, Boca Raton, pp. 1–37.
Baba, K., Macpherson, E., Lin, C.-W. & Chan, T.-Y. (2009) Crustacean Fauna of Taiwan: Squat Lobsters (Chirostylidae and Galatheidae). National Taiwan Ocean University, Keelung, ix + 311 pp.
Balss, H. (1913) Neue Galatheiden aus der Ausbeute der deutschen Tiefsee-Expedition. 'Valdivia'. Zoologischer Anzeiger, 41, 221–226.
Balss, H. (1957) Decapoda. Dr. H.G. Bronn's Klassen und Ordnungen des Tierreichs, 1, 1505–1672.
Barnard, K.H. (1950) Descriptive catalogue of South African decapod Crustacea (crabs and shrimps). Annals of the South African Museum, 38, 1–837.
Benedict, J.E. (1902) Description of a new genus and forty-six new species of crustaceans of the family Galatheidae with a list of the known marine species. Proceedings of the Biological Society of Washington, 26, 243–334.
Bouvier, E.L. (1896) Sur la famille des Chirostylidae, Ortmann, et sur la classification des Galatheidea [Crust.]. Bulletin de la Société Entomologique de France, 65, 307–312.
https://doi.org/10.5962/bhl.part.29069Bracken-Grissom, H.D., Cannon, M.E., Cabezas, P., Feldmann, R.M., Schweitzer, C.E., Ahyong, S.T., Felder, D.L., Lemaitre, R., Crandall, K.A. (2013) A comprehensive and integrative reconstruction of evolutionary history for Anomura (Crustacea: Decapoda). BMC Evolutionary Biology, 13, 128.
https://doi.org/10.1186/1471-2148-13-128Caullery, M. (1896) Crustacés schizopodes et décapodes. In: Koehler, R. (Ed.), Résultats scientifiques de la Campagne du Caudan dans le Golfe de Gascogne, août-septembre, 1895. Annales de l'Université de Lyon, 26, 365–419, pls. 13–17.
Chace, F.A. (1942) The Anomura Crustacea. I. Galatheidea. Reports of the scientific results of the Atlantis Expeditions to the West Indies, under the joint auspices of the University of Havana and Harvard University. Torreia, 11, 1–106.
Davie, P. J. F. (2002) Crustacea: Malacostraca: Eucarida. Part 2. Decapoda—Anomura, Brachyura. Vol. 19.3B. CSIRO Publishing, Melbourne, xiv + 641 pp.
de Melo-Filho, G.A.S. & de Melo, G.A.S. (2004) A new species of genus Gastroptychus Caullery, 1896 (Decapoda: Anomura: Chirostylidae) from the Brazilian coast. Nauplius, 12, 45–50.
Filhol, H. (1884) Explorations sous-marines. Voyage du Talisman. La Nature, Paris, 12, 119–122, 134–138, 147–151, 161–164, 182–186, 198–202, 230–234, 278–282, 326–330, 391–394.
Haig, J. (1968) First report of the crab family Chirostylidae off California, and description of a new species of Chirostylus. California Fish and Game, 54, 270–277.
Haig, J. (1979) A new genus and species of Chirostylidae (Decapoda, Anomura, Galatheidea) from the Hawaiian Islands. Crustaceana, 5, 89–94.
Henderson, J.R. (1885) Diagnoses of new species of Galatheidae collected during the “Challenger” Expedition. Annals and Magazine of Natural History, Series 5, 16, 407–421.
Henderson, J.R. (1888) Report on the Anomura collected by H.M.S. Challenger during the years 1873–76. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873–76. Zoology, 27, 1–221, 21 pls.
Macpherson, E. & Baba, K. (2011) Taxonomy of squat lobsters. In: Poore, G.C.B., Ahyong, S.T. & Taylor, J. (Eds.), The Biology of Squat Lobsters. CSIRO Publishing, Melbourne, and CRC Press, Boca Raton, pp. 39–71.
Macpherson, E., Jones, W. & Segonzac, M. (2005) A new squat lobster family of Galatheoidea (Crustacea, Decapoda, Anomura) from the hydrothermal vents of the Pacific-Antarctic Ridge. Zoosystema, 27, 709–723.
Milne Edwards, A. (1880) Reports on the results of dredging under the supervision of Alexander Agassiz, in the Gulf of Mexico and in the Caribbean Sea, etc. VIII. Études préliminaires sur les Crustacés. Bulletin of the Museum of Comparative Zoology at Harvard College, 8, 1–168, pls. 1, 2.
Milne Edwards, A. & Bouvier, E.L. (1894) Considérations générales sur la famille des Galathéidés. Annales des Sciences Naturelles, Zoologie, Series 7, 16, 191–327.
Milne Edwards, A. & Bouvier, E.L. (1897) Reports on the results of dredging, under the supervision of Alexander Agassiz, in the Gulf of Mexico (1877–78), in the Caribbean Sea (1878–79), and along the Atlantic coast of the United States (1880), by the U. S. Coast Survey steamer “Blake,” Lieut.-Com. C.D. Sigsbee, U.S.N., and Commander J.R. Bartlett, U.S.N., commanding. XXXV: Description des Crustacés de la Famille des Galathéidés recueillis pendant l’expédition. Memoirs of the Museum of Comparative Zoology at Harvard College, 19, 1–141, pls. 1–12.
Miyake, S. & Baba, K. (1968) On the generic characters of Chirostylus, with description of two Japanese species (Crustacea, Anomura). Journal of the Faculty of Agriculture, Kyushu University, 14, 279–387.
Ortmann, A.E. (1892) Die Decapoden-Krebse des Strassburger Museums, mit besonderer Berücksichtigung der von Herrn Dr. Döderlein bei Japan und bei den Liu-Kiu-Inseln gesammelten und zur Zeit im Strassburger Museum aufbewahrten Formen. IV. Die Abtheilungen Galatheidea und Paguridea. Zoologische Jahrbücher, Abtheilung für Systematik, Geographie und Biologie der Thiere, 6, 241–326.
https://doi.org/10.5962/bhl.part.26455Ortmann, A. (1898–1901) Crustacea (Zweite Hälfte: Malacostraca). In: Gerstaecker, A. (Ed.), Die Klassen und Ordnungen der Arthropoden wissenschaftlich dargestellt in Wort und Bild. 5 (Abtheilung 2). C.F. Winter’sche Verlagshandlung, Leipzig.pp. i–viii + 1–1319, 128 pls.
Osawa, M. & Nishikiori, K. (1998) A new species of the genus Chirostylus Ortmann, 1892 (Crustacea: Decapoda: Anomura: Chirostylidae) from the Ogasawara Islands, southern Japan. Proceedings of the Biological Society of Washington, 111, 382–388.
Pomel, A. (1847) Note sur des animaux fossiles découverts dans de département de l’Allier (addition au mémoire sur la géologie paléontologique, etc). Bulletin de la Société Géologique de France, Series 2, 4, 378–385.
Poore, G.C.B. (2004) Marine decapod Crustacea of southern Australia. A guide to identification (with chapter on Stomatopoda by Shane Ahyong). CSIRO Publishing, Melbourne, 574 pp.
Rice, A.L. & Miller, J.E. (1991) Chirostylid and galatheid crustacean associates of coelenterates and echinoderms collected from the Johnson-Sea-Link submersible, including a new species of Gastroptychus. Proceedings of the Biological Society of Washington, 104, 299–308.
Roterman, C.N., Copley, J.T., Linse, K.T., Tyler, P.A. & Rogers, A.D. (2013) The biogeography of the yeti crabs (Kiwaidae) with notes on the phylogeny of the Chirostyloidea (Decapoda: Anomura). Proceedings of the Royal Society B, 280, 20130718.
https://doi.org/10.1098/rspb.2013.0718Schnabel, K. E. (in review) The Marine Fauna of New Zealand. Squat lobsters (Crustacea: Decapoda: Chirostyloidea). NIWA Biodiversity Memoir.
Schnabel, K.E. & Ahyong, S.T. (2010) A new classification of the Chirostyloidea (Crustacea: Decapoda: Anomura). Zootaxa, 2687, 56–64.
Schnabel, K.E., Ahyong, S.T. & Maas, E.W. (2011) Galatheoidea are not monophyletic—Molecular and morphological phylogeny of the squat lobsters (Decapoda: Anomura) with recognition of a new superfamily. Molecular phylogenetics and Evolution, 58, 157–168.
https://doi.org/10.1016/j.ympev.2010.11.011Stebbing, T.R.R. (1920) South African Crustacea (Part X of S.A. Crustacea, for the Marine Investigations in South Africa). Annals of the South African Museum, 17, 231–272.
Tirmizi, N.M. (1964) Crustacea: Chirostylidae (Galatheidea). The John Murray Expedition 1933–34, Scientific Reports, 10, 385–415.
Van Dam, A.J. (1933) Die Chirostylidae der Siboga-expedition. Decapoda VIII: Galatheidea: Chirostylidae. Siboga Expéditie, 39a7, 1–46.
Yokoya, Y. (1933) On the distribution of decapod crustaceans inhabiting the continental shelf around Japan, chiefly based upon the materials collected by S.S. Soyo-Maru during the years 1923–30. Journal of the College of Agriculture, Tokyo Imperial University, 12, 1–226.
Zariquiey Alvarez, R. (1968) Crustaceos decapodos Ibericos. Investigacion Pesquera, 32, i–xv + 1–510.