Abstract
A new species of panopeid crab from shallow coastal waters of Belize is formally described and named based upon comparative study of three small specimens obtained in the course of a regional biodiversity survey of decapod crustaceans. The herein designated holotype of Hexapanopeus klausruetzleri n. sp. is a specimen previously included in a comparative molecular phylogenetic analysis that showed it to be closely related to, but genetically distinct from, the western Atlantic species Hexapanopeus angustifrons (Benedict & Rathbun, 1891). Hexapanopeus klausruetzleri n. sp. differs from this widely reported warm-temperate species in both its smoother carapace and pereopod surfaces and its generally more lobiform anterolateral teeth. The unique male first gonopod of the new species also strongly supports its morphological separation from all known congeners and other superficially similar western Atlantic panopeids with which it might be confused. To date, mature females have not been found, and the limited available collections are restricted to the vicinity of Carrie Bow Cay and nearby waters. Fourteen additional species of small panopeid and pseudorhombilid crabs, similar to Hexapanopeus klausruetzleri n. sp. in size and general habitus, were taken in the course of our studies in Belize. Most have not been previously reported from these waters, and several warrant further study to confirm their identifications.
References
Benedict, J.E. & Rathbun, M.J. (1891) The genus Panopeus. Proceedings of the United States National Museum, 14, 355–385., pls. 319–324. https://doi.org/10.5479/si.00963801.14-858.355
De Grave, S. & Felder, D.L. (2012) The genus Processa in the vicinity of Carrie Bow Cay (Belize), with description of a new species (Crustacea: Decapoda: Processidae). Zootaxa, 3436 (1), 41–50. https://doi.org/10.11646/zootaxa.3436.1.3
Desbonne, I. & Schramm, A. (1867) Crustacés de la Guadeloupe d’après un manuscrit du docteur I. Desbonne comparé avec les échantillons de Crustacés de sa collection et les dernières publications de MM. H. de Saussure et William Stimpson. 1re Partie. Brachyures [Edited, with a preface, by Schramm, A.], Imprimerie
Du Gouvernment, Basse-Terre, pp. 1–60., pls. 1–8. https://doi.org/10.5962/bhl.title.10000
Duffy, J.E. (1996) Synalpheus regalis, new species, a sponge-dwelling shrimp from the Belize barrier reef, with comments on host specificity in Synalpheus. Journal of Crustacean Biology, 16 (3), 564–573. https://doi.org/10.2307/1548748
Duffy, J.E. (1998) On the frequency of eusociality in snapping shrimps (Decapoda: Alpheidae), with description of a second eusocial species. Bulletin of Marine Science, 63 (2), 387–400.
Felder, D.L., Álvarez, F., Goy, J.W. & Lemaitre, R. (2009) Chapter 59: Decapoda (Crustacea) of the Gulf of Mexico, with comments on the Amphionidacea. In: Felder, D.L. & Camp, D.K. (Eds.), Gulf of Mexico Origin, Waters, and Biota. Volume 1, Biodiversity. Texas A&M University Press, College Station, pp. 1019–1104.
Felder, D.L. & Martin, J.W. (2003) Establishment of a new genus for Panopeus bermudensis Benedict and Rathbun, 1891, and several other xanthoid crabs from the Atlantic and Pacific Oceans (Crustacea: Decapoda: Xanthoidea). Proceedings of the Biological Society of Washington, 116, 438–452.
Felder, D.L. & Thoma, B.P. (2020) A new genus and species of mud crab (Crustacea, Brachyura, Panopeidae) from shoreline waters of the western Gulf of Mexico. Zootaxa, 4845(3) , 425–435. https://doi.org/10.11646/zootaxa.4845.3.7
Goy, J.W. & Felder, D.L. (1988) Two new species of Microprosthema from the Western Atlantic (Crustacea: Decapoda: Stenopodidea). Journal of Natural History, 22, 1277–1292. https://doi.org/10.1080/00222938800770781
Guinot, D. (1967) Recherches préliminaries sur les groupements naturels chez les Crustacés Décapods Brachyoures. II. Les anciens genres Micropanope Stimpson et Medaeus Dana. Bulletin du Muséum National d’Histoire naturelle (Paris), série 2, 39, 345–374.
Guinot, D. (1968) Recherches préliminaries sur les groupements naturels chez les Crustacés Décapods Brachyoures. IV. Observations sur quelques genres de Xanthidae. Bulletin du Muséum National d’Histoire naturelle (Paris), série 2, 39, 695–727. [Dated 1967, published 1968]
Guinot, D. (1969a) Recherches préliminaries sur les groupements naturels chez les Crustacés Décapods Brachyoures. VII. Les Goneplacidae. Bulletin du Muséum National d’Histoire naturelle (Paris), série 2, 41, 241–265.
Guinot, D. (1969b) Recherches préliminaries sur les groupements naturels chez les Crustacés Décapods Brachyoures. VII. Les Goneplacidae (suite). Bulletin du Muséum National d’Histoire naturelle (Paris), série 2, 41, 507–528.
Guinot, D. (1969c) Recherches préliminaries sur les groupements naturels chez les Crustacés Décapods Brachyoures. VII. Les Goneplacidae (suite et fin). Bulletin du Muséum National d’Histoire naturelle (Paris), série 2, 41, 688–724.
Guinot, D. (1971) Recherches préliminaries sur les groupements naturels chez les Crustacés Décapods Brachyoures. VIII. Syntheses et Bibliographie. Bulletin du Muséum National d’Histoire naturelle (Paris), série 2, 42, 1063–1090.
Guinot, D. (1978) Principes d’une classification evolutive des Crustacés Décapodes Brachyoures. Bulletin Biologique de la France et de la Belgique, new series, 112, 211–292.
Guinot, D. (1990) Établissement du genre Garthiope gen. nov., ses relations avec le genre Coralliope Guinot, 1967, et leurs affinités avec les Trapeziidae sensu lato (Crustacea Decapoda Brachyura). Bulletin du Muséum National d’Histoire naturelle (Paris), série 4, 12 (A 2), 469–478.
Hernández-Ávila, I., Gómez, A., Lira, C. & Galindo, L. (2007) Benthic decapod crustaceans (Crustacea: Decapoda) of Cubagua Island, Venezuela. Zootaxa, 1557 (1), 33–45. https://doi.org/10.11646/zootaxa.1557.1.2
Kensley, B. (1996) The genus Paraxiopsis De Man, with descriptions of new species from the Western Atlantic (Crustacea: Decapoda: Axiidae). Bulletin of Marine Science, 58, 709–729.
Kingsley, J.S. (1879) Notes on North American Decapoda. Proceedings of the Boston Society of Natural History, 20, 145–160.
Lemaitre, R. & Felder, D.L. (2012) A new species of the hermit crab genus Areopaguristes Rahayu & McLaughlin, 2010 (Crustacea: Decapoda: Anomura: Diogenidae) discovered in the Mesoamerican Barrier Reef of Belize, Caribbean Sea. Zootaxa, 3480 (1), 67–79. https://doi.org/10.11646/zootaxa.3480.1.3
Macdonald, K.S., III & Duffy, J.E. (2006) Two new species of sponge-dwelling snapping shrimp from the Belizean Barrier Reef, with a synopsis of the Synalpheus brooksi species complex. American Museum Novitates, 3543, 1–22. https://doi.org/10.1206/0003-0082(2006)3543[1:TNSOSS]2.0.CO;2
Magalhães, T. & Felder, D.L. (2019) A new species of hairy crab genus Pilumnus
(Decapoda: Brachyura: Pilumnidae) from Belize. Zootaxa, 4711 (1), 175–184.
Manning, R.B. & Felder, D.L. (1996) Nannotheres moorei, a minute new genus and species of pinnotherid crab from Belize, Caribbean Sea (Crustacea: Decapoda: Pinnotheridae). Proceedings of the Biological Society of Washington, 109 (2), 311–317.
Martin, J.W. & Abele, L.G. (1986) Notes on male pleopod morphology in the brachyuran crab family Panopeidae Ortmann, 1893, sensu Guinot (1978) (Decapoda). Crustaceana, 50, 182–198. https://doi.org/10.1163/156854086X00205
Martínez-Iglesias, J.C. & García Raso, J.E. (1999) The crustacean decapod communities of three coral reefs from the southwestern Caribbean Sea of Cuba: species composition, abundance and structure of the communities. Bulletin of Marine Science, 65, 539–557.
Mejía-Ortíz, L.M., López-Mejía, M. & Muñoz-Gómez, A.V. (2008) Crustáceos Decápodos (Chapter 13). In: Mejía-Ortíz, L.M. (Ed.), Biodiversidad Aquatica de la Isla de Cozumel. Universidad de Quintana Roo, Plaza y Valdés, México, pp. 225–238.
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, 1877, ‘78, ‘79, by the United States Coast Survey steamer “Blake,” Lieut.-Com. C.D. Sigsbee, U.S.N., and Commander J.R. Bartlett, U.S.N., commanding. 8. Études préliminaires sur les Crustacés. Bulletin of the Museum of Comparative Zoölogy, Harvard College, 8, 1–68., 2 pls.
Palacios Theil, E. & Felder, D.L. (2019) Molecular phylogeography of Tumidotheres maculatus and Zaops ostreus (Crustacea: Decapoda: Pinnotheridae) in the western Atlantic, with description of a new species and generic re-assignment of Epulotheres angelae. Marine Biology Research, 15, 548–567.
Palacios Theil, E. & Felder, D.L. (2020) Molecular phylogenetics of the genus Austinixa Heard & Manning, 1997, with description of three new species and redescription of Austinixa felipensis (Glassell, 1935) (Decapoda: Brachyura: Pinnotheridae). Zootaxa, 4778 (1), 101–134. https://doi.org/10.11646/zootaxa.4778.1.4
Poupin, J. (2018) Les Crustacés décapodes de Petites Antilles. Avec de nouvelles observations pour Saint-Martin, la Guadeloupe et las Martinique. Publications Scientifiques du Muséum national d’Histoire naturelle, (Patrimoines naturels 77), Paris, 264 p.
Rathbun, M J. (1898) The Brachyura of the biological expedition to the Florida Keys and the Bahamas in 1893. Bulletin from the Laboratories of Natural History of the State University of Iowa, 4, 250–294., 9 pls.
Rathbun, M.J. (1921) Report on the Brachyura collected by the Barbados-Antigua Expedition from the University of Iowa in 1918. University of Iowa Studies (Studies in Natural History), 9 (5), 65–90, pls. I, II.
Rathbun, M.J. (1930) The cancroid crabs of America of the families Euryalidae, Portunidae, Atelecyclidae, Cancridae and Xanthidae. Bulletin of the U.S. National Museum, 152, i–xvi + 1–609. https://doi.org/10.5479/si.03629236.152.i
Saussure, H. de. (1857) Diagnoses de quelques Crustacés nouveaux de l’Amerique tropicale. Revue et Magzin de Zoologie Pure et Appliquée, series 2, 9, 501–505.
Say, T. (1818) An account of the Crustacea of the United States. Journal of the Academy of Natural Sciences of Philadelphia, 2, 235–253, 313–319, 374–401, 423–444, 445–458, pl. 4.
Schubart, C.D., Neigel, J.E. & Felder, D.L. (2000) A molecular phylogeny of mud crabs (Brachyura: Panopeidae) from the northwestern Atlantic, and the role of morphological stasis and convergence. Marine Biology, 137, 11–18. https://doi.org/10.1007/s002270000325
Smith, S.I. (1869) Notice of the Crustacea collected by Prof. C. F. Hartt on the coast of Brazil in 1867. Transactions of the Connecticut Academy of Arts and Sciences, 2, 1–41, pl. I. https://doi.org/10.5962/bhl.part.20634
Thoma, B.P., Guinot, D. & Felder, D.L. (2014) Evolutionary relationships among American mud crabs (Crustacea: Decapoda: Brachyura: Xanthoidea) inferred from nuclear and mitochondrial markers, with comments on adult morphology. Zoological Journal of the Linnean Society, 170, 86–109. https://doi.org/10.1111/zoj.12093
Thoma, B.P., Schubart, C.D. & Felder, D.L. (2009) Molecular phylogeny of the western Atlantic representatives of the genus Hexapanopeus (Decapoda: Brachyura: Panopeidae). In: Martin, J.W., Crandall, K.A. & Felder, D.L. (Eds.), Crustacean Issues: Decapod Crustacean Phylogenetics. Taylor and Francis/CRC Press, Boca Raton, Florida, pp. 551–565.
Williams, A.B. (1965) Marine decapod crustaceans of the Carolinas. Fishery Bulletin, U.S., 65, i–xi + 1–298.
Williams, A.B. (1993) Mud shrimps, Upogebiidae, from the Western Atlantic (Crustacea: Decapoda: Thalassinidea). Smithsonian Contributions to Zoology, 544, i–iii + 1–77. https://doi.org/10.5479/si.00810282.544