First zoeal stage of ?Cataleptodius parvulus (Fabricius, 1793) and Xanthodius denticulatus (White, 1848) (Decapoda: Brachyura): larval evidences and systematic position

Abstract

The first zoeal stages of ?Cataleptodius parvulus and Xanthodius denticulatus are described and compared with zoeae of other members of the subfamily Xanthinae. The larvae of ?C. parvulus and X. denticulatus differ mainly in: 1) spinulation of rostral and dorsal spines; 2) type of antenna; 3) setation of the basis of first maxilliped; and 4) type of telson. Features common to both species include a carapace provided with well-developed spines on the dorsal (1), rostral (1), and lateral (2) portions; and the antennal protopod and rostrum similar in length. The morphological differences between the zoea I of X. denticulatus and ?C. parvulus are nevertheless consistent enough to suggest that these species do not belong to the same genus Xanthodius Stimpson, 1859 as previously supposed. Also we presume that ?C. parvulus does not belong to the genus Cataleptodius.

First zoeal stage of the crab Domecia acanthophora (Desbonne, in Desbonne & Schramm, 1867) (Decapoda, Brachyura) and revision of the larval morphology of superfamily Trapezioidea

“…Marques et al, 2003;Barros-Alves et al, 2013;Guerao et al, 2014). According to phylogenetic analysis, Clark and Ng (2010) suggested that the genera Domecia, Quadrella Dana, 1851, Tetralia Dana, 1851and Trapezia Latreille, 1828 are nested in one clade that is defined by the absence of seta 3.5 and seta 3.4 on the third endopodal segment of the second maxilliped (for details, see Clark and Guerao, 2008), and should be according to a synapomorphy defines the Domecia + Tetralia + Trapezia clade: the presence of one subterminal seta on the distal endopod segment of the maxillule (vs. two subterminal setae).…”

Evolutionary Developmental Biology (Evo‐Devo) Research in Latin America

“…First zoeal stage of Cataleptodius parvulus (Fabricius, 1793) and Xanthodius denticulatus (White, 1848) (Decapoda: Brachyura): larval evidences and systematic position (Barros‐Alves et al., )…”

A description of the first zoeal stage of Pilumnus vinaceus A. Milne-Edwards, 1880 (Decapoda, Pilumnidae), with a revision of the first zoea morphology of Pilumnus Leach, 1815

“…Pilumnus Leach, 1815 comprises about 150 species (Ng et al, 2008;Magalhães et al, 2021), popularly known as "hairy crabs" because they have many setae distributed over the carapace and/or pereiopods. These crabs are common in many coastal environments (e.g., coral reefs [Garth, 1984;Giraldes et al, 2015], rocky shores [Kyomo, 1999;Alves et al, 2012;Moraes et al, 2015], unconsolidated bottom [Melo et al, 2000;Ng, 2000] and in association with invertebrates [Lindberg & Frydenborg, 1980;Alves et al, 2012b;Alves et al, 2013]), mainly in tropical regions, but also in temperate zones (Takeda & Miyake, 1969;Williams, 1984;Melo, 1996).…”

“…As an example of systematic instability, Pilumnus vinaceus A. Milne-Edwards, 1880, previously considered to be a junior synonym of P. dasypodus by Rathbun (1897), was recently considered a valid species after a review based on integrative morphological and molecular data (Magalhães et al, 2021). The knowledge of the larval morphology can be an important accessory tool in the search for solutions to problems of this systematics, as for many other decapod (Barros- Alves et al, 2013;Clark & Cuesta, 2015;Magalhães et al, 2017). In addition, larval forms of these crabs also may contribute to studies that seek to understand the structure of planktonic communities by providing information that allows the identification of its components.…”