First record of malformations in males of Ucides occidentalis (Brachyura, Ocypodidae) in the Gulf of Guayaquil, Ecuador

Occurrence of a tumour-like abnormality in the telson skeleton of the brine shrimp Artemia (Branchiopoda, Anostraca)

“…Some occurrences of abnormalities in copepods such as damage to the exoskeleton, leading to breakage of body parts, or such as intestinal prolapse, were referred to unfavourable physico-chemical conditions in the natural habitat (Crisafi, 1974;Montú & Gloeden, 1982), or to environmental stress, injuries, pollution (Lopez Greco et al, 2000), as well as to parasites and predators (Peltzer et al, 2011). But it was also plausibly argued that those can be attributed to random occurrences, as in the case of malformations in ocypodid crabs (Zambrano, 2017).…”

“…The existence of morphological abnormalities in crustaceans has been recorded at irregular intervals and those reported include skeletal malformations (Pan-dourski & Evtimova, 2005), abnormalities in sexual characters (Brylinski, 1984;Martinelli-Filho et al, 2009;Long et al, 2010;Asem & Sun, 2013), and tumourlike anomalies (Skovgaard, 2004;Bhandare & Ingole, 2008). These malformations have been observed in the species' natural habitats as well as in laboratory studies (McKenney, 2005;Asem & Sun, 2013;Zambrano, 2017).…”

Notas sobre taxonomía, biología y pesquería de Ucides occidentalis (Brachyura: Ocypodidae) con énfasis en el Golfo de Guayaquil, Ecuador

“…En los cangrejos homoquelos las dimensiones de los propodios quelares son similares, mientras que, los heteroquelos presentan indistintamente un propodio quelar más grande . Los machos adultos de U. occidentalis tienen el mero del quelípedo tan largo que no se pueden movilizar sin mantenerlos lateralmente ubicados, lo cual le confiere una posición corporal característica para caminar y alimentarse (Wright 1968); por otra parte, en estos individuos se ha documentado malformaciones morfológicas en cefalotórax, propodios quelares y/o periópodos, de etiología desconocida (Zambrano 2017b).…”

A case of bilateral hypertrophy in the chelae of a male specimen of Minuca rapax (Smith, 1870) (Decapoda, Brachyura, Ocypodidae)

“…Nauplius, 26: e2018032 recorded cheliped malformation in a specimen of Ucides cordatus (Linnaeus, 1763), Fransozo et al (2012) described external morphological abnormalities in marine crabs (Decapoda, Brachyura) on the northern coast of the state of São Paulo, and Lira et al (2013) recorded a case of malformation in the third maxilliped for a fiddler crab violinist Uca rapax [= Minuca rapax (Smith, 1870)]. Recently, Zambrano (2017) recorded the first case of malformation in Ucides occidentalis (Ortmann, 1897) for 11 specimens in the Gulf of Guayaquil, Ecuador.…”