Caprella equilibra Say 1818

• Main Authors: Paz-Ríos, Carlos E., Guerra-García, José M., Ardisson, Pedro-Luis
• Format: Text
• Language: unknown
• Published: Zenodo 2014
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Amphipoda; Caprellidae; Caprella; Caprella equilibra; Pacific; Ortega; Alvarez; Rodriguez; Ortiz; Chevreux; Diaz; Dougherty; Escobar; Lazo; St. Andrew Bay; North Atlantic
• Online Access: https://dx.doi.org/10.5281/zenodo.5195982; https://zenodo.org/record/5195982

Caprella equilibra Say, 1818 (Figure 2) Caprella equilibra Say, 1818; Steinberg and Dougherty, 1957: 273–274, figs 1, 2. McCain, 1968: 25–30, figs 12, 13. McCain and Steinberg, 1970; Cavedini, 1982; Lazo-Wasem and Gable, 1987: 335–336, fig. 10. Krapp-Schickel, 1993: 782–783, fig. 533. Serejo, 1998; Ortiz et al., 2002, fig. 21. Foster, Thomas, et al., 2004: 162, 167–168, fig. 7. Diaz et al., 2005: 3–4, fig. 4. Winfield, Escobar-Briones, et al., 2007: 44, fig. 14. Guerra-García and Ros, 2012: 76–78, fig. 2. Caprella aequilibra Mayer, 1882: 45, pl. 1, fig. 7, pl. 2, figs 1–11, pl. 4, figs 20–25, pl. 5, figs 16–18. Chevreux and Fage, 1925: 455, fig. 433. Caprella bermudia Kunkel, 1910: 108–110, fig. 42. Lazo-Wasem and Gable, 1987: 335–336, fig. 10. Material examined Station 33, two males, six females, two juveniles (one male and one female from this station used for figures), BRTC 2–9489. Type locality Charleston, South Carolina. Distribution Cosmopolitan (McCain 1968; Krapp-Schickel 1993). Records in the Gulf of Mexico MEX: Tamaulipas and Veracruz continental shelf (Escobar-Briones and Winfield 2003); Mexican ridges and Sigsbee abyssal plain at southwest (Winfield et al. 2006). USA: Port Aransas (Steinberg and Dougherty 1957); Port Isabel; Galveston; Grand Isle; Panama City (McCain 1968); Louisiana Offshore (Lewbel et al. 1987); Coast of Mississippi; St Andrew Bay (Foster, Thomas, et al. 2004); Port Aransas Offshore (present study). Habitat Caprella equilibra has been found on seagrasses, green and red algae, sponges, hydroids, alcyonarians, bryozoans, gorgonians, and ascidians (McCain 1968; Gable and Lazo-Wasem 1987; Alarcón-Ortega et al. 2012). It has also been found in plankton samples, artificial substrata (Lewbel et al. 1987; Takeuchi and Sawamoto 1998; present study) and on the carapace of the loggerhead sea turtle Caretta caretta (Caine 1986). The depth range reported is shallow water extending to 3700 m (Winfield et al. 2006; Winfield and Escobar-Briones 2008; LeCroy et al. 2009). Remarks In the Gulf of Mexico, C. equilibra is similar to C. danilevskii because both lack a cephalic spine. However, these species can be easily separated because C. equilibra has a ventral spine between the bases of the second gnathopod, whereas C. danilevskii does not. A recent morphological study of C. equilibra in southern Spain has revealed intraspecific variation in the female abdomen, even within the same population (Guerra-García and Ros 2012). According to the diagnosis of the genus Caprella by McCain (1968), the abdomen of males is provided with a pair of uni- or bi-articulate appendages and a pair of lobes; females only have the pair of lobes and lack appendages. However, a few females of C. equilibra found in southern Spain were provided with abdominal appendages. The study provided evidence supporting the idea that the abdominal appendage is a polymorphic and symplesiomorphic character in Caprella and Metacaprella Mayer, 1903 (another genus with the same morphological variation), and that Metacaprella is not a valid genus (Guerra-García and Ros 2012). : Published as part of Paz-Ríos, Carlos E., Guerra-García, José M. & Ardisson, Pedro-Luis, 2014, REVIEW ARTICLE Caprellids (Crustacea: Amphipoda) from the Gulf of Mexico, with observations on Deutella mayeri, redescription of Metaprotella hummelincki, a taxonomic key and zoogeographical comments, pp. 2517-2578 in Journal of Natural History 48 (41 - 42) on pages 2524-2526, DOI: 10.1080/00222933.2014.931481, http://zenodo.org/record/5194444 : {"references": ["Say T. 1818. An account of the Crustacea of the United States. J Acad Nat Sci Phila. 1: 374 - 401.", "Steinberg JE, Dougherty EC. 1957. The skeleton shrimps (Crustacea: Caprellidae) of the Gulf of Mexico. Tulane Stud Zool. 5: 267 - 288.", "McCain JC. 1968. The Capreillidae (Crustacea: Amphipoda) of the Western North Atlantic. Bull US Natl Mus. 278: 1 - 147.", "McCain JC, Steinberg JE. 1970. Amphipoda I, Caprellidea I, Fam. Caprellidae. Crustaceorum Catalogus. 2: 1 - 78.", "Cavedini P. 1982. Contributo alla conoscenza dei Caprellidi del Mediterraneo (Crustacea, Amphipoda). Boll Mus Civ Stor Nat Verona. 8: 493 - 531.", "Lazo-Wasem EA, Gable MF. 1987. A review of recently discovered type specimens of Bermuda Amphipoda (Crustacea: Peracarida) described by B. W. Kunkel (1882 - 1969). Proc Biol Soc Wash. 100: 321 - 336.", "Krapp-Schickel G. 1993. Suborder Caprellidea. Memoires de l Institut Oceanographique Monaco. 13: 773 - 809.", "Serejo CS. 1998. Gammaridean and Caprellidean fauna (Crustacea) associated with the sponge Dysidea fragilis Johnston at Arraial do Cabo, Rio de Janeiro, Brazil. Bull Mar Sci. 63: 363 - 385.", "Ortiz M, Alvarez F, Winfield I. 2002. Caprellid amphipods (Amphipoda: Caprellidea): illustrated key for the genera and species from the Gulf of Mexico and the Caribbean Sea. Ciudad de Mexico (MX): Universidad Nacional Autonoma de Mexico.", "Diaz YJ, Guerra-Garcia JM, Martin A. 2005. Caprellids (Crustacea: Amphipoda: Caprellidae) from shallow waters of the Caribbean coast of Venezuela. Org Div Evol. 5: 249 - 251. Available from: http: // www. senckenberg. de / odes / 05 - 10. htm", "Guerra-Garcia JM, Ros M. 2012. Presence of abdominal appendages in females of Caprella equilibra Say, 1818 (Peracarida, Amphipoda): is Metacaprella Mayer, 1903 a valid genus? Crustaceana. 85: 71 - 79.", "Mayer P. 1882. Die Caprelliden des Golfes von Neapel under angrenzenden Meeres- Abschnitte. Eine Monographie. Fauna Flora Golfe Neapel. 6: 1 - 201.", "Chevreux E, Fage L. 1925. Amphipodes. Faune de France. 9: 1 - 488.", "Kunkel BW. 1910. The Amphipoda of Bermuda. Trans Connect Acad Arts Sci. 16: 106 - 113.", "Escobar-Briones E, Winfield I. 2003. Checklist of the benthic Gammaridean and Caprellidae (Crustacea: Peracarida: Amphipoda) from the Gulf of Mexico Continental Shelf and Slope. Belg J Zool. 133: 37 - 44.", "Winfield I, Escobar-Briones E, Morrone JJ. 2006. Update checklist and identification of areas of edemism of benthic amphipods (Caprellidae and Gammaridea) from offshore habitats in the SW Gulf of Mexico. Sci Mar. 70: 99 - 108.", "Lewbel GS, Howard RL, Gallaway BJ. 1987. Zonation of dominant fouling organisms on Northern Gulf of Mexico petroleum platforms. Mar Environ Res. 21: 199 - 224.", "Alarcon-Ortega LC, Guerra-Garcia JM, Sanchez-Moyano JE, Cupul-Magana FG. 2012. Feeding habits of caprellids (Crustacea: Amphipoda) from the west coast of Mexico. Do they feed on their hosting substrates? Zool beatica. 23: 11 - 20.", "Takeuchi I, Sawamoto S. 1998. Distribution of caprellid amphipods (Crustacea) in the western North Pacific based on the CSK International Zooplankton collection. Plankton Biol Ecol. 45: 225 - 230.", "Caine EA. 1986. Carapace epibionts of nesting loggerhead sea turtles: Atlantic coast of USA. J Exp Mar Biol Ecol. 95: 15 - 26.", "Winfield I, Escobar-Briones E. 2008. Composicion, dominancia y distribucion batimetrica de los anfipodos bentonicos (Caprellidea y Gammaridea) en la porcion mexicana del Golfo de Mexico. In: Alvarez F, Rodriguez-Almaraz GA, editors. Crustaceos de Mexico: estado actual de su conocimiento. Monterrey (MX): Universidad Autonoma de Nuevo Leon; p. 17 - 32.", "LeCroy S, Gasca R, Winfield I, Ortiz M, Escobar-Briones E. 2009. Amphipoda (Crustacea) of the Gulf of Mexico. In: Felder DL, Camp DK, editors. Gulf of Mexico origins, waters and biota, vol. I, Biodiversity. Corpus Christi (TX): Texas AandM University Press; p. 941 - 972.", "Mayer P. 1903. Die Caprellidae der Siboga-Expedition. Siboga Exped. 34: 1 - 160."]}