Scyramathia umbonata (Stimpson, 1871)

Lee, Bee Yan, Richer De Forges, Bertrand & Ng, Peter K. L., 2020, Revision of the deep-water spider crab genus, Scyramathia A. Milne-Edwards, 1880, with the description of a new species from the Mediterranean and notes on Rochinia A. Milne-Edwards, 1875, and Anamathia Smith, 1885 (Crustacea, Decapoda, Brachyura, Epialtidae), Zoosystematics and Evolution 96 (2), pp. 537-569 : 537

publication ID	https://dx.doi.org/10.3897/zse.96.48041
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treatment provided by	Zoosystematics and Evolution by Pensoft (2020-09-02 04:05:35, last updated 2024-11-27 23:06:01)
scientific name	Scyramathia umbonata (Stimpson, 1871)
status

Treatment

Scyramathia umbonata (Stimpson, 1871) View in CoL Figs 11A-C View Figure 11 , 14E View Figure 14

Scyra umbonata Stimpson 1871: 115 (type locality: off Sand Key, Florida).

Scyra umbonata : A. Milne-Edwards 1875 [in 1873-1880]: 87-88; A. Milne-Edwards 1880 [in 1873-1880]: pl. 31A fig. 5-5b; A. Milne Edwards 1880c: 2; Sars, 1885: 6 (list), 7 (list), 274 (list); Smith 1886: 626[22 on separate]

Scyramathia umbonata : A. Milne-Edwards 1880a: 356; A. Milne-Edwards 1880b: 277; A. Milne-Edwards and Bouvier 1923: 381; Tavares and Santana 2018: 204 (list), Figs 1 View Figure 1 , 12C View Figure 12 , 13A, B View Figure 13 .

Anamathia umbonata : Rathbun 1894: 61-62, pl. 1 Figs 1 View Figure 1 - 3 View Figure 3 ; Faxon 1895: 10.

Rochinia umbonata : Rathbun 1925: 210 (key), 222, 223, text-fig. 85, pl. 72, pl. 73 fig. 1; Bullis and Thompson 1965: 12 (list); Williams et al. 1968: 61, fig. 16; Takeda 1983: 135; Williams 1984: 322 (key), 323-325, figs 258, 260c; Abele and Kim 1986: 42, 172 (key); Griffin and Tranter 1986: 175 (list); Soto 1991: 628 (table), 632 (list), 633 (list), 634, 636 (list); Tavares 1991: 161 (list), 164; Poupin 1994: 43, 44, pl. 4 fig. g; Nizinski 2003: 128; McLaughlin et al. 2005: 253 (list); Wicksten and Packard 2005: 1762 (list); Casadío et al. 2005: 159 (list), 160; Ng and Richer de Forges 2007: 63 (list); Ng et al. 2008: 106 (list); Felder et al. 2009: 1078 (list); Pettan 2013: 72-80, 87 (key), figs 14a, b, 17h, 18b, 19b, 20b, 28a-d, 29a-c; Pettan and Tavares 2014: 306 (list), fig. 1; Tavares et al. 2016: 1065-1069, figs 1-6.

Rochinia confusa Tavares 1991: 161 (list), 162-165, fig. 1A-C, 5A, pl. 1 A-D (type locality: off Rio de Janeiro, 23°46'S, 42°09'W, Brazil); De Melo 1996: 266 (key), 267, unnumbered in-text fig.; Casadío et al. 2005: 158 (list); Ng and Richer de Forges 2007: 63 (list); Ng et al. 2008: 105 (list); Pettan 2013: 21-26, 87 (key), figs 7a, b, 16a, 18a, 19a, 20a; Pettan and Tavares 2014: 305 (list), fig. 1. (For the remaining Neotropics literature, see Tavares et al. 2016).

Material examined.

Paratype of Rochinia confusa Tavares, 1991: 1 ♂ (8.0 × 5.2 mm) (MNHN-IU-2014-19836 [= MNHN-B24570]), stn 54, Brazil, 19°36'S, 38°53'W, coll. TAAF/MD55, 2 June 1987. Other material: 1 ♀ (36.7 × 27.9 mm) (NSMT-Cr7178), off Suriname, 7°47'N, 54°08'W, 60 m, coll. 1980.

Diagnosis.

Carapace pyriform, covered with short setae. Pseudorostral spine short, diverging. Supraorbital eave fused to carapace with sharp preorbital spine; postorbital lobe and hepatic spine fused, forming a L-shape plate-like structure, pointing upwards; plate-like structure not formed on juvenile specimens. Carapace with raised plates: 1 hepatic plate curved, pointing upwards, 1 short mesogastric granule above 1 oblong mesogastric plate, 1 oblong cardiac plate, 1 large epibranchial plate, 1 mesobranchial plate, 1 posterior blunt spine, 1 lateral branchial plate curved upwards (Fig. 11A View Figure 11 ). Plates less distinct on juvenile specimens. Antennal flagellum equal to or slightly longer than pseudorostral spines. Basal antennal article with convex outer margin, with blunt distal angle of article. Buccal frame covered by third maxilliped, distal angle of buccal frame raised, distinct. Pterygostomial region plate-like with 3 or 4 granules on outer margin (Fig. 11B View Figure 11 ). Chelipeds slender, propodus longer than fingers, slightly carinate. Ambulatory legs slender; merus cylindrical; male P2 merus length approximately 0.7 times carapace length, female P2 merus length 0.6-1.0 times carapace length, male P2 merus length approximately 9.0 times width, female P2 merus length 9.5-12.3 times width; male P5 merus length approximately 04 times carapace length, female P5 merus length 04-0.6 times carapace length, male P5 merus length approximately 4.4 times width, female P5 merus length 4.1-6.9 times width (cf. Rathbun 1925: pl. 72, 73 fig. 1; Figs 11A View Figure 11 , 14E View Figure 14 ). Male thoracic sternum wide, concave on sternites 1-4; regions well defined; sternites 3, 4 widest, lateral margins slightly constricted. Male pleon, telson triangular; surface of somites smooth (Fig. 11E View Figure 11 ). G1 straight with flattened sharp tip (cf. Tavares and Santana 2018: fig. 13A, B).

Remarks.

Scyramathia umbonata was originally described as a species of Scyra by Stimpson (1871) from off Sand Keys in Florida. Stimpson (1871) provided measurements for one male specimen but did not indicate if he had more material. It was transferred to Scyramathia by A. Milne-Edwards (1880a), and Rathbun (1894) subsequently referred it to Anamathia . Rathbun (1925) later transferred the species to Rochinia when she synonymised the genera. The type material for the S. umbonata is probably no longer extant ( Tavares et al. 2016).

Tavares et al. (2016) discussed the taxonomy of S. umbonata at length (see also Tavares and Santana 2018) and synonymised Rochinia confusa Tavares, 1991, under S. umbonata , stating that R. umbonata undergoes drastic changes in morphology as it grows, with more distinct plates being present on larger sized specimens. This is the same pattern as seen in S. carpenteri and S. hertwigi . Tavares and Santana (2018) later transferred it back to Scyramathia . There is no need to redescribe or figure this species as the detailed study and figures of this species by Tavares et al. (2016) and Tavares and Santana (2018) are quite sufficient. For these reasons, a neotype is also not needed for this species for the time being.

Distribution.

Scyramathia umbonata is recorded from the North Carolina to Gulf of Mexico (United States of America), Nicaragua, Caribbean Island, and Brazil ( Tavares et al. 2016).

References

Abele, LG, Kim, W, 1986. An illustrated guide to the marine decapod crustaceans of Florida. Department of Environmental Regulation, State of Florida, Technical Series, 8(1), xvii + 225 pp.

Bullis, HR, Thompson, JR, 1965. Collections by the Exploratory Fishing Vessels Oregon, Silver Bay, Combat, and Pelican made during 1956 to 1960 in the Southwestern North Atlantic. United States Fish and Wildlife Service, Special Scientific Report, Fisheries 510: 1 - 130

Casadio, S, Feldmann, RM, Parras, A, Schweitzer, CE, 2005. Miocene fossil Decapoda (Crustacea: Brachyura) from Patagonia, Argentina, and their paleoecological setting. Annals of Carnegie Museum 74(3): 151-188. https://doi.org/10.2992/0097-4463(2005)74[151:MFDCBF]2.0.CO;2

De Melo, GAS, 1996. Manual de Identificacao dos Brachyura (Caranguejos e Siris) do Litoral Brasileiro. Pleiade/FAPESP, Sao Paulo, Brazil

Faxon, W, 1895. The Stalk-Eyed Crustacea. In: Reports on an exploration off the west coasts of Mexico, Central and South America, and off the Galapagos Islands, in charge of Alexander Agassiz, by the U.S. Fish Commission steamer Albatross, during 1891, Lieut.-Commander Z. L. Tanner, U.S.N. commanding. XV. Memoirs of the Museum of Comparative Zooelogy at Harvard College XVIII: 1-292. [pls. A-K + I-LVII] [Apr.1895].

Felder, DL, Alvarez, F, Goy, JW, Lemaitre, R, 2009. Decapoda (Crustacea) of the Gulf of Mexico, with comments on the Amphionidacea. In: Felder, DL, Camp, DK, Eds., Gulf of Mexico-Origins, Waters, and Biota. Biodiversity. Texas A&M University Press, College Station, Texas: 1019 - 1104

Griffin, DJG, Tranter, HA, 1986. The DecapodaBrachyura of the Siboga expedition. Part VIII: Majidae. Siboga Expeditie Monografie 39: [i]-[vii], 1-335.

McLaughlin, PA, Camp, DK, Angel, MV, Bousfield, EL, Brunel, P, Brusca, RC, Cadien, D, Cohen, AC, Conlan, K, Eldredge, LG, Felder, DL, Goy, JW, Haney, T, Hann, B, Heard, RW, Hendrycks, EA, Hobbs, HH, Holsinger, JR, Kensley, B, Laubitz, DR, LeCroy, SE, Lemaitre, R, Maddocks, RF, Martin, JW, Mikkelsen, P, Nelson, E, Newman, WA, Overstreet, RM, Poly, WJ, Price, WW, Reid, JW, Robertson, A, Rogers, DC, Ross, A, Schotte, M, Schram, FR, Shih, C-T, Watling, L, Wilson, GDF, Turgeon, DD, 2005. Common and Scientific Names of Aquatic Invertebrates from the United States and Canada: Crustaceans. American Fisheries Society, Special Publication, Volume 31. Bethesda, Maryland, 1-533.

Milne-Edwards, A, 1880a. Compte rendu sommaire d'une exploration zoologique faite dans le golfe de Gascogne a bord du navire de l'Etat le Travailleur. Comptes rendus hebdomadaires des Seances de l'Academie des Sciences, Paris 91(7): 355-360. [23 August 1880 (p. 424 of issue 8 of same volume implies that issue 7 had already been published)].

Milne-Edwards, A, 1880b. Rapport sur l'exploration scientifique du Travailleur. Le Naturaliste, Journal des echanges et des nouvelles 2(35): 275-277. [1 September 1880 (p. 273 of same issue)].

Milne-Edwards, A, 1880c. Etudes preliminaires sur les crustaces. 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.-Commander C.D. Sigsbee, U.S.N., and Commander J.R. Bartlett, U.S.N., commanding. VIII. Bulletin of the Museum of Comparative Zooelogy, Harvard College 8 (1): 1 - 68

Milne-Edwards, A, Bouvier, E-L, 1923. Les Porcellanides et des Brachyures. In: 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. XLVII. Memoirs of the Museum of Comparative Zoology at Harvard College 47 (4): 283 - 395

Ng, PKL, Richer de Forges, B, 2007. A new species of deep-water spider crab of the genus Rochinia A. Milne-Edwards, 1875, from Guam (Crustacea: Brachyura: Majidae). Zootaxa 1610: 61 - 68, DOI: https://doi.org/10.11646/zootaxa.1610.1.5

Ng, PKL, Guinot, D, Davie, PJF, 2008. Systema Brachyurorum: part I. An annotated checklist of extant brachyuran crabs of the world. Raffles Bulletin of Zoology 17 (supplement): 1-286.

Nizinski, MS, 2003. Annotated checklist of decapod crustaceans of Atlantic coastal and continental shelf waters of the United States. Proceedings of the Biological Society of Washington 116 (1): 96 - 157

Pettan, RB, 2013. Revisao taxonomica preliminar das especies americanas do genero Rochinia A. Milne-Edwards, 1875 (Crustacea: Brachyura: Epialtidae). Unpublished M.Sc. thesis, Departamento de Zoologia, Instituto de Biociencias da Universidade de Sao Paulo

Pettan, RB, Tavares, M, 2014. Rochinia hystrix (Stimpson, 1871) in the Southwestern Atlantic, with morphological comparison to the partially sympatric congener Rochinia tanneri (Smith, 1883) (Brachyura, Epialtidae). Crustaceana 87 (3): 305 - 311, DOI: https://doi.org/10.1163/15685403-00003292

Poupin, J, 1994. Faune marine profonde des Antilles francaises. Recoltes du navire Polka faites en 1993: 1-79. (ORSTOM Editions, Collection Etudes et Theses, Paris).

Rathbun, MJ, 1894. Notes on the crabs of the family Inachidae in the United States National Museum. Proceedings of the United States National Museum 17 (984): 43 - 75, DOI: https://doi.org/10.5479/si.00963801.17-984.43

Rathbun, MJ, 1925. The spider crabs of America. United States National Museum Bulletin 129: 1 - 613, DOI: https://doi.org/10.5479/si.03629236.129.i

Smith, SI, 1886. Report on the decapod Crustacea of the Albatross dredgings off the east coast of the United States during the summer and autumn of 1884. Annual Report of the Commissioner of Fish and Fisheries for 1885. Report of the Commission on Fish and Fisheries 13: 605-698 [1-94]. [pls. 1-6]

Soto, LA, 1991. Faunal zonation of the deep-water brachyuran crabs in the Straits of Florida. Bulletin of Marine Science 49 (1-2): 623 - 637

Stimpson, W, 1871. Brachyura. Preliminary Report on the Crustacea dredged in the Gulf Stream in the Straits of Florida, by L. F. de Pourtales, Assist. U.S. Coast Survey. Bulletin of the Museum of Comparative Zoology at Harvard College 2(2): 109-160. [1871] [Imprint is 1 Dec.1870] [For date of publication, see Manning and Holthuis 1981: 377.] [Note: The name of the Assistant of the U.S. Coast Survey is spelt as Pourtales in three instances in the Contents but as Pourtales on title pages of the relevant articles.].

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Tavares, MS, 1991. Redefinition des genres Rochinia A. Milne Edwards, Sphenocarcinus A. Milne Edwards et Oxypleurodon Miers, et etablissement du genre Nasutocarcinus gen. nov. (Crustacea, Brachyura, Majidae). Bulletin de Museum national d'Histoire naturelle, Section A (Zoology) (Series 4) 13 (1-2): 159-179. [figs 1-6, pl. 1] [In French with and English abstract].

Tavares, MS, Santana, W, Pettan, R, 2016. Rochinia confusa, a junior synonym of R. umbonata (Crustacea: Brachyura: Epialtidae) as revealed by ontogenetic changes. Journal of the Marine Biological Association of the United Kingdom 96 (5): 1065 - 1071, DOI: https://doi.org/10.1017/S0025315415001587

Tavares, MS, Santana, W, 2018. Refining the genus Rochinia A. Milne-Edwards, 1875: reinstatement of Scyramathia A. Milne-Edwards, 1880 and Anamathia Smith, 1885, and a new genus for Amathia crassa A. Milne-Edwards, 1879, with notes on its ontogeny (Crustacea: Brachyura: Epialtidae). Zootaxa 4418 (3): 201 - 227, DOI: https://doi.org/10.11646/zootaxa.4418.3.1

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Figures

Figure 1. Rochinia gracilipes A. Milne-Edwards, 1875, paralectotype male [dry] (20.0 x 15.0 mm) (MNHN-IU- 2000 - 4460 [= MNHN-B 4460]), Cap. Corrientes. A. overall dorsal view; B. overall ventral view; C. lateral view of carapace.

Figure 3. Illustration of Scyramathia carpenteri (Norman, in Thomson 1873), " sandy chalk of Holtenia ground ", overall dorsal view. (After Norman, in Thomson 1873: fig. 35).

Figure 11. A-C. Scyramathia umbonata (Stimpson, 1871), female (36.7 x 27.9 mm) (NSMT-Cr 7178), off Suriname; D-F. Rochinia confusa Tavares, 1991, paratype male (8.0 x 5.2 mm) (MNHN-IU- 2014 - 19836 [= MNHN-B 24570]), Brazil. A, C. overall dorsal view; B, E. overall ventral view; C, F. lateral view of carapace.

Figure 12. Colour in life of Scyramathia tenuipes sp. nov., holotype male (33.9 x 26.3 mm) (ICMD 288), Mediterranean Sea (Credits: MacPherson E & Abello P).

Figure 13. Scyramathia tenuipes sp. nov., holotype male (33.9 x 26.3 mm) (ICMD 288), Mediterranean Sea. A. overall dorsal view; B. overall ventral view; C. lateral view of carapace.

Figure 14. Dorsal view of P 5. A, B. Scyramathia carpenteri (Norman, in Thomson 1873); A. male (41.3 x 34.0 mm) (NHM 1983.449), North Sea; B. ovigerous female (35.8 x 29.0 mm) (NHM 1978.99), Atlantic Ocean; C, D. S. hertwigi Doflein, in Chun 1900; C. male (34.6 x 27.3 mm) (NHM 1924.7.19.1 - 3), South Africa; D. female (24.5 x 18.4 mm) (SAM-A 47872), South Africa; E, S. umbonata (Stimpson, 1871), female (36.7 x 27.9 mm) (NSMT-Cr 7178), off Suriname; F-J. S. tenuipes sp. nov.; F. holotype male (33.9 x 26.3 mm) (ICMD 288), Mediterranean Sea; G. paratype male (29.7 x 22.0 mm) (ICMD 000707), Mediterranean Sea; H. paratype male (32.0 x 25.4 mm) (ZRC 2019.1636), Mediterranean Sea,; I. paratype ovigerous female (31.2 x 24.6 mm) (ICMD 000708), Mediterranean Sea,; J. paratype ovigerous female (32.2 x 25.8 mm) (ZRC 2019.1635), Mediterranean Sea.