Mecataleptodius TAVARES & MENDONÇA, 2022, gen. nov.
- 1. Museu de Zoologia, Universidade de São Paulo. CEP 04263 - 000, São Paulo, SP, Brazil
Description
Mecataleptodius gen. nov.
Type species. Cancer parvulus Fabricius, 1793: 451, by original designation [Type locality: “Americae meridionalis insulis”]. Gender: masculine.
Species included. Mecataleptodius parvulus (Fabricius, 1793), gen. nov., comb. nov., and Mecataleptodius olsoni (Manning & Chace, 1990), gen. nov., comb. nov. (type locality: Ascension Island).
Etymology. The name Mecataleptodius is formed from the Greek prefix “me” (not) and the masculine generic name Cataleptodius.
Diagnosis. Carapace suboval (Fig. 34A, C), about 1.5 times broader than long, moderately convex anteriorly, flat posteriorly. Areas of carapace generally well recognizable, anterior two-thirds lobulated, but not posteriorly. Anterolateral margin cut into 5 broad teeth or lobes; posterolateral margins nearly straight, strongly convergent. Frontorbital margin (exorbital tooth included) about half of maximum carapace width, incised in middle line. Orbits suboval; eyestalks short, massive. Antennal flagellum not excluded from orbit, lodged in infraorbital notch. Chelipeds (Fig. 34A–C, E) slightly to moderately unequal in both sexes; tips of fingers spooned. Pleon of male with somites 3–5 fused. Gonopod as illustrated (Fig. 35D, E).
Remarks. The two species here transferred to Mecataleptodius gen. nov. strongly differ from the species in Cataleptodius Guinot, 1968, in the morphology of the first gonopod, as revealed by its type species, C. floridanus (Gibbes, 1850) (type locality: Key West, Florida), and the east Pacific C. occidentalis (Stimpson, 1871b) (type locality: Panama and Manzanillo, Mexico) (Figs. 35A–C, 36C). In Mecataleptodius gen. nov. the first gonopod ends in a rounded apical projection extending beyond the subterminal field of spines and long setae (Fig. 35D, E).
Ng et al. (2008) suspected that Mecataleptodius parvulus gen. nov., comb. nov., was not a member of Cataleptodius by referring to it with a question mark,? Cataleptodius parvulus. Barros-Alves et al. (2013) compared the first zoea stage of M. parvulus gen. nov., comb. nov. (as Cataleptodius parvulus) with the first zoea of a number of other Xanthidae (including Cataleptodius floridanus) and opined that the differences found suggested that it was not a member of Leptodius A. Milne-Edwards, 1869, Xantho Leach, 1814, Xanthodius Stimpson, 1859, or Cataleptodius, as also shown herein by the morphology of the first male gonopod (Figs. 35A–E, 36A–D).
More research is necessary to confirm as to whether or not other species currently included in Cataleptodius actually belong to Mecatalecptodius gen. nov.
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Xanthidae
- Genus
- Mecataleptodius
- Kingdom
- Animalia
- Order
- Decapoda
- Phylum
- Arthropoda
- Scientific name authorship
- Tavares & de Mendonça
- Taxonomic status
- gen. nov.
- Taxon rank
- genus
- Taxonomic concept label
- Mecataleptodius TAVARES & MENDONÇA, 2022
References
- Fabricius, J. C. (1793) Entomologia systematica emendata et aucta, secundum classes, ordines, genera, species, adjectis synonimis, locis, observationibus, descriptionibus. Vol. 2. impensis Christ. Gottl. Proft, Hafniae, 519 pp. https: // doi. org / 10.5962 / bhl. title. 125869
- Manning, R. B. & Chace, F. A. Jr. (1990) Decapod and stomatopod Crustacea from Ascension Island, South Atlantic Ocean. Smithsonian Contributions to Zoology, 503, 1 - 91. https: // doi. org / 10.5479 / si. 00810282.503
- Guinot, D. (1968) Recherches preliminaires sur les groupements naturels chez les Crustaces Decapodes Brachyoures. IV. Observations sur quelques genres de Xanthidae. Bulletin du Museum national d'Histoire naturelle, Serie 2, 39 (4), 695 - 727. [1967]
- Gibbes, L. R. (1850) On the carcinological Collections of the Cabinets of Natural History in the United States. Proceedings of the Third Meeting of American Association for Advancement of Science, 3, 165 - 201.
- Stimpson, W. (1871 b) Notes on North American Crustacea in the Museum of the Smithsonian Institution, No. III. Annals of the Lyceum of Natural History of New York, 10 (4 - 5), 92 - 136. https: // doi. org / 10.1111 / j. 1749 - 6632.1874. tb 00028. x
- Ng P. K. L., Davie P. J. F. & Guinot, D. (2008) Systema Brachyurorum: Part 1. An Annotated checklist of extant Brachyuran crabs of the world. The Raffles Bulletin of Zoology, 17, 1 - 286.
- Barros-Alves, S. P., Alves, D. F. R., Bolla, E. A., Cobo, V. J. & Negreiros-Franozo, M. L. (2013) First zoeal stage of? Cataleptodius parvulus (Fabricius, 1793) and Xanthodius denticulatus (White, 1848) (Decapoda: Brachyura): larval evidences and systematic position. Zootaxa, 3731 (2), 234 - 242. https: // doi. org / 10.11646 / zootaxa. 3731.2.4
- Milne-Edwards, A. (1869) Description de quelques especes nouvelles de Crustaces provenant du voyage de M. A. Bouvier aux Iles du Cap Vert. Revue et Magasin de Zoologie, 21, 350 - 355, 374 - 378, 409 - 412.
- Leach, W. E. (1814) Crustaceology. In: Brewster, D. (Ed.), The Edinburgh Encyclopaedia. Vol. 7. Blackwood, Edinburgh, pp. 383 - 437, pl. 221.
- Stimpson, W. (1859) Notes on North American Crustacea, No. 1. Annals of the Lyceum of Natural History of New York, 7, 49 - 93, pl. I https: // doi. org / 10.1111 / j. 1749 - 6632.1862. tb 00142. x