Partial Revision of Pinnotherid Crab Genera with a Two-Segmented Palp on the Third Maxilliped (Decapoda: Brachyura)

Campos, Ernesto

doi:10.2307/1548747

Cited by 17 publications

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“…Pinnotherid crabs are small decapods that live in association with a large variety of invertebrates, such as ascideans, brachiopods, axiid shrimps, echinoderms, polychaetes, gastropods and bivalves (Rathbun, 1900;Campos, 1990Campos, , 1996Campos, , 2002Feldmann et al, 1996;Grove and Woodin, 1996;Geiger and Martin, 1999;Ng and Manning, 2003;Peiró and Mantelatto, 2011). Several authors considered some species as commensals (Feldmann et al, 1996;Baeza, 1999;Mantelatto and Cuesta, 2010), while others refer to other species as parasites, family Pinnotheridae is far from complete.…”

Section: Introductionmentioning

confidence: 99%

Living with a crab: effect of Austinotheres angelicus (Brachyura, Pinnotheridae) infestation on the condition of Saccostrea palmula (Ostreoida, Ostreidae)

2014

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-Some members of the Pinnotheridae family exhibit close symbiotic relationships with bivalves, which may cause severe damage to the mollusk. The condition index (CI) is a tool that serves to evaluate the effect of biotic and abiotic factors on the morphology and physiology of mollusks, including those caused by symbiotic organisms. In the present study, we evaluated the effects of the infestation of the pinnotherid crab Austinotheres angelicus on the oyster Saccostrea palmula through monthly sampling (April to November 2012) in Punta Morales, Pacific coast of Costa Rica. A total of 245 oysters were analyzed, of which 38% were infested by the pinnotherid crab. Most of the oysters analyzed (92%) varied in depth between 1.5 and 15.0 mm; 89% of the infested oysters were in this depth range. The prevalence was positively correlated with the depth of the oyster. Our results revealed that crab infestation could reduce the CI by 11 to 33%. The obtained findings suggest that the infestation by A. angelicus provokes alterations of the flesh production of the oyster, especially when the association is with a pair of crabs including an ovigerous female. The association of A. angelicus with S. palmula is best described as facultative parasitism for male crabs and obligatory parasitism for females.

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Section: Introductionmentioning

confidence: 99%

Living with a crab: effect of Austinotheres angelicus (Brachyura, Pinnotheridae) infestation on the condition of Saccostrea palmula (Ostreoida, Ostreidae)

2014

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“…3a); males of this genus, and those of Fabia share long swimming setae on external face of carpus and propodus of P3 and P4, and two or more abdominal somites fused (Figs. 3b, 3d; Campos, 1993Campos, , 1996Campos & Manning, 1998). Females of A. angelicus have the dactylus of P3 longer than the others pereopods, and males have all abdominal somites and telson well separated (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…The only other two American pinnotherid crabs, which are symbionts of oysters of the genus Crassostrea in the Atlantic Ocean include Zoaps ostreum and Z. geddesi (see Rathbun, 1918;Schmitt et al, 1973;Campos & Manning, 2000). In addition, several hundreds of Modiolus capax (Conrad, 1837) (Rathbun, 1893) and Opisthopus transversus Rathbun, 1893 have been confirmed as symbionts of M. capax but from the west coast of Baja California Sur, Mexico (Campos et al, 1992;Campos, 1996).…”

Section: Hostsmentioning

confidence: 99%

“…The present study deals with Juxtafabia muliniarum sensu Cabrera-Peña et al (2001), a symbiont of the oyster Saccostrea palmula Carpenter, 1857. Juxtafabia Campos, 1993 is a monotypic genus, closely related to Fabia Dana, 1851 (Campos, 1993(Campos, , 1996. Females of both genera share an asymmetrical pair of pereopods 3 (walking legs 2), longer than the others, and males possess two or more abdominal somites fused (Campos, 1993(Campos, , 1996.…”

Section: Introductionmentioning

confidence: 99%

“…Juxtafabia Campos, 1993 is a monotypic genus, closely related to Fabia Dana, 1851 (Campos, 1993(Campos, , 1996. Females of both genera share an asymmetrical pair of pereopods 3 (walking legs 2), longer than the others, and males possess two or more abdominal somites fused (Campos, 1993(Campos, , 1996. In addition, both males and females in both genera lack a tubercle on the basal article of the antennae (Campos, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Austinotheres angelicus (Lockington, 1877): the correct name for the symbiotic crab Juxtafabia muliniarum sensu Cabrera Pena et al. (2001) (Crustacea, Brachyura, Pinnotheridae)

Campos¹,

Vargas-Castillo²

2014

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ABSTRACT. The taxonomic identity of the symbiotic crabs Juxtafabia muliniarum sensu Cabrera-Peña et al. (2001) was revised. The morphology of these specimens, collected in the estuary of Punta Morales, Pacific coast of Costa Rica, in the oyster Saccostrea palmula did not agree with J. muliniarum but concurs well with topotypes and voucher material of Austinotheres angelicus from the Gulf of California, Mexico. Austinotheres angelicus belongs to the subfamily Pinnotherinae sensu Campos, 2009, and the morphology of A. angelicus supports its close relationship with Bonita mexicana and Enigmatheres canfieldi. The presence of a soft and thin carapace colored with deep chocolate brown with dark purple tones, a conspicuous protuberance in the basal antennal article, a third maxilliped with an ischio-merus fused with its inner margin angled, a carpus larger than the propodus, and a digitiform and small dactylus subdistally inserting on the ventral margin of the propodus are diagnostic features for A. angelicus. These characteristics separate this species from other pinnotherid crabs from the entire Pacific Ocean. Keywords: Juxtafabia muliniarum, taxonomy, Pinnotheridae, Brachyura, Crustacea. RESUMEN. Se revisó la identidad taxonómica del cangrejo simbionte Juxtafabia muliniarum sensu CabreraPeña et al. (2001). La morfología de los especímenes recolectados en el estuario de Punta Morales, costa Pacífica de Costa Rica, en el ostión Saccostrea palmula no concordaron con J. muliniarum pero concurren bien con topotipos y material verificado de Austinotheres angelicus del Golfo de California, México. Austinotheres angelicus pertenece a la subfamilia Pinnotherinae sensu Campos, 2009 y su morfología apoya su cercana relación con Bonita mexicana y Enigmatheres canfieldi. La presencia de un caparazón blando y delgado, de color chocolate intenso con tonos purpura oscuros, una conspicua protuberancia en el artejo basal de la antena, un tercer maxilipedio con el isquio-merus fusionado con su margen interno angulado, un carpus más grande que el propodus y el pequeño dáctilo digitiforme que se inserta sobre el margen ventral del propodus son características diagnosticas para A. angelicus. Estas características separan a esta especie de otros pinotéridos del océano Pacífico. Austinotheres angelicus (Lockington

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Phylomorphometrics reveal ecomorphological convergence in pea crab carapace shapes (Brachyura, Pinnotheridae)

Gier

2023

Ecology and Evolution

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Most pea crab species (Crustacea: Decapoda: Brachyura: Pinnotheridae) are characterized by their symbiotic lifestyle, often thought to be obligate parasites or commensals (Baeza, 2015). The degree of host dependency is, however, still unclear for most species. The species within the subfamily Pinnotherinae are known to be endo-or ectosymbiotic inhabitants of bivalves, polyplacophorans, gastropods, holothurians, echinoids, brachiopods, and ascidians (de Gier & Becker, 2020). Although some species have a broad host spectrum spanning across various phyla, most species of Pinnotherinae are considered to be specialists. This means that these species are only inhabiting specific genera or orders within a host phylum. Several species of the two smaller subfamilies (Pinnixinae and Pinnixulalinae) are also found in bivalve, or in/on holothurian hosts in their adult stages, but most are considered to be free-living or tube/ burrow-dwelling, sharing this habitat with a worm, ghost shrimp, or mud lobster as a host (inquilism; see Palacios Theil et al., 2016;

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Partial Revision of Pinnotherid Crab Genera with a Two-Segmented Palp on the Third Maxilliped (Decapoda: Brachyura)

Cited by 17 publications

References 0 publications

Living with a crab: effect of Austinotheres angelicus (Brachyura, Pinnotheridae) infestation on the condition of Saccostrea palmula (Ostreoida, Ostreidae)

Living with a crab: effect of Austinotheres angelicus (Brachyura, Pinnotheridae) infestation on the condition of Saccostrea palmula (Ostreoida, Ostreidae)

Austinotheres angelicus (Lockington, 1877): the correct name for the symbiotic crab Juxtafabia muliniarum sensu Cabrera Pena et al. (2001) (Crustacea, Brachyura, Pinnotheridae)

Phylomorphometrics reveal ecomorphological convergence in pea crab carapace shapes (Brachyura, Pinnotheridae)

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