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Population dynamics of the pea crab Austinixa aidae (Brachyura, Pinnotheridae): a symbiotic of the ghost shrimp Callichirus major (Thalassinidea, Callianassidae) from the southwestern Atlantic; Dinâmica populacional do caranguejo Austinixa aidae (Brachyura, Pinnotheridae): simbionte de Callichirus major (Thalassinidea, Callianassidae) no Atlântico sudoeste

PEIRÓ, Douglas F; MANTELATTO, Fernando L
Fonte: Fundação Zoobotânica do Rio Grande do Sul Publicador: Fundação Zoobotânica do Rio Grande do Sul
Tipo: Artigo de Revista Científica
ENG
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The Pinnotheridae family is one of the most diverse and complex groups of brachyuran crabs, many of them symbionts of a wide variety of invertebrates. The present study describes the population dynamics of the pea crab Austinixa aidae (Righi, 1967), a symbiont associated with the burrows of the ghost shrimp Callichirus major (Say, 1818). Individuals (n = 588) were collected bimonthly from May, 2005 to September, 2006 along a sandy beach in the southwestern Atlantic, state of São Paulo, Brazil. Our data indicated that the population demography of A. aidae was characterized by a bimodal size-frequency distribution (between 2.0 and 4.0 mm and between 8.0 and 9.0 mm CW) that remained similar throughout the study period. Sex ratio does not differ significantly from 1:1 (p > 0.05), which confirms the pattern observed in other symbiontic pinnotherids. Density values (1.72 ± 1.34 ind. • ap.-1) are in agreement with those found for other species of the genus. The mean symbiosis incidence (75.6%) was one of the highest among species of the Pinnotheridae family, but it was the lowest among the three studied species of the genus. Recruitment pattern was annual, beginning in May and peaking in July, in both years, after the peak of ovigerous females in the population (from March to May). Our findings describe ecological and biological aspects of A. aidae similar to those of other species of this genus...

Morphology of the first zoeal stage of the commensal southwestern Atlantic crab Austinixa aidae (Righi 1967) (Brachyura: Pinnotheridae), hatched in the laboratory

MANTELATTO, Fernando L.; CUESTA, Jose A.
Fonte: SPRINGER Publicador: SPRINGER
Tipo: Artigo de Revista Científica
ENG
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The first zoeal stage of the endemic southern Atlantic pinnotherid crab Austinixa aidae is described and illustrated based on laboratory-hatched material from ovigerous females collected from the upper burrows of the thalassinidean shrimp Callichirus major at Ubatuba, So Paulo, Brazil. The zoeae of Austinixa species can be distinguished from other pinnotherids and especially from zoeae of the closely related species of Pinnixa by the telson structure.; CNPq[301359/2007-5]

Ecologia do caranguejo Austinixa aidae (Righi, 1967) (Crustacea: Brachyura: Pinnotheridae) de uma praia arenosa do litoral Norte do Estado de São Paulo; Ecology of symbiotic crab Austinixa aidae (RIGHI, 1967) (Crustacea: Brachyura: Pinnotheridae) from a sand beach in north shore of State of São Paulo

Peiró, Douglas Fernando
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 31/03/2008 PT
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O objetivo deste trabalho foi caracterizar aspectos biológicos e ecológicos de Austinixa aidae, um caranguejo simbionte em galerias construídas pelo Thalassinidea Callichirus major, na Praia do Perequê-Açu, Ubatuba, litoral Norte do Estado de São Paulo. As coletas foram realizadas por meio de bombas de sucção manual na região intermareal da praia arenosa, de Maio/2005 a Setembro/2006. Nesta dissertação foram apresentados, em três capítulos distintos, a Estrutura Populacional, o Crescimento Relativo e as Estratégias Reprodutivas deste caranguejo. No Capítulo I, sua população foi estudada com ênfase em aspectos estruturais como abundância sazonal, freqüência de indivíduos em classes de tamanho, razão sexual, densidade e incidência nas galerias de seus hospedeiros, os períodos reprodutivo e de recrutamento. Além disso, foram avaliadas as correlações entre sua densidade e seu tamanho com o tamanho de seus respectivos hospedeiros. Foi constatado que as espécies do gênero Austinixa possuem aspectos ecológicos e biológicos semelhantes, mesmo em casos de localidades muito distantes geograficamente, corroborando o que foi postulado por outros autores quanto à similaridade destes parâmetros entre os membros do grupo. No Capítulo II...

Subtropical Brazilian mangroves as a refuge of crab (Decapoda: Brachyura) diversity

Colpo, Karine Delevati; Chacur, Monica Mungai; Guimaraes, Fernanda Jordao; Negreiros-Fransozo, Maria Lucia
Fonte: Springer Publicador: Springer
Tipo: Artigo de Revista Científica Formato: 3239-3250
ENG
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16.81%
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Processo FAPESP: 94/4878-8; Processo FAPESP: 95/8520-3; Processo FAPESP: 98/3134-6; Processo FAPESP: 98/15292-5; This study characterized seven mangrove areas of different sizes, located on the southeastern Brazilian coast, with respect to their sediment and vegetation features. We also estimated the richness and composition of the brachyuran assemblages in these mangroves. Crab, vegetation and sediment data were collected during low tide. The larger mangroves showed richer and complex forests, and may be more ecologically stable than smaller mangroves. Twenty-eight species of crabs were recorded, members of nine families: Panopeidae, Pinnotheridae, Gecarcinidae, Grapsidae, Sesarmidae, Varunidae, Ocypodidae, Ucididae, and Portunidae. Ocypodoidea predominated over Grapsoidea in the smaller mangrove areas in pioneer stages of forest establishment, whereas the opposite was recorded for larger and more stable mangroves, where the forest can reach advanced stage of development. Comprido is a small mangrove, but its crab assemblage was similar to the larger ones, probably because of other factors not investigated here (e.g., megalopa settling rate). This study provided basic knowledge for developing conservation strategies for vulnerable mangrove ecosystems.

Dinâmica espacial e temporal de zoeas de Brachyura (Crustacea, Decapoda) no estuário do Rio Jaguaribe, Itamaracá, Pernambuco, Brasil

Silva-Falcão,Elisabeth C.; Severi,William; Rocha,Aline A. F. da
Fonte: Fundação Zoobotânica do Rio Grande do Sul Publicador: Fundação Zoobotânica do Rio Grande do Sul
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2007 PT
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16.81%
Um estudo da distribuição fotoperiódica e sazonal das zoeas de Brachyura foi realizado no estuário do Rio Jaguaribe, Pernambuco, Brasil. Amostras de plâncton foram obtidas bimestralmente, durante o ano de 2001, em diferentes marés e nos períodos noturno e diurno em duas estações de coleta. Foram identificados 14 táxons, onde a família Ocypodidae, representada pelas larvas de Ucides cordatus (Linnaeus, 1763) e Uca spp., foi a mais abundante, seguida de Xanthidae e Grapsidae. Na estação próxima à foz, os táxons estiveram bem distribuídos, além de ter apresentado um maior número de famílias identificadas. As larvas de Ocypodidae, Grapsidae e Morfotipo B indicaram um movimento de dispersão para áreas costeiras, enquanto que os Pinnotheridae indicaram uma provável retenção nas águas do estuário. A elevada ocorrência de zoeas no primeiro estágio larval reforça o importante papel dos estuários como berçários para diversas espécies de crustáceos.

Population dynamics of the pea crab Austinixa aidae (Brachyura, Pinnotheridae): a symbiotic of the ghost shrimp Callichirus major (Thalassinidea, Callianassidae) from the southwestern Atlantic

Peiró,Douglas F; Mantelatto,Fernando L
Fonte: Fundação Zoobotânica do Rio Grande do Sul Publicador: Fundação Zoobotânica do Rio Grande do Sul
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2011 EN
Relevância na Pesquisa
27.85%
The Pinnotheridae family is one of the most diverse and complex groups of brachyuran crabs, many of them symbionts of a wide variety of invertebrates. The present study describes the population dynamics of the pea crab Austinixa aidae (Righi, 1967), a symbiont associated with the burrows of the ghost shrimp Callichirus major (Say, 1818). Individuals (n = 588) were collected bimonthly from May, 2005 to September, 2006 along a sandy beach in the southwestern Atlantic, state of São Paulo, Brazil. Our data indicated that the population demography of A. aidae was characterized by a bimodal size-frequency distribution (between 2.0 and 4.0 mm and between 8.0 and 9.0 mm CW) that remained similar throughout the study period. Sex ratio does not differ significantly from 1:1 (p > 0.05), which confirms the pattern observed in other symbiontic pinnotherids. Density values (1.72 ± 1.34 ind. • ap.-1) are in agreement with those found for other species of the genus. The mean symbiosis incidence (75.6%) was one of the highest among species of the Pinnotheridae family, but it was the lowest among the three studied species of the genus. Recruitment pattern was annual, beginning in May and peaking in July, in both years, after the peak of ovigerous females in the population (from March to May). Our findings describe ecological and biological aspects of A. aidae similar to those of other species of this genus...

Dimorphism in males of Zaops ostreum (Say) (Crustacea, Decapoda, Pinnotheridae)

Sankarankutty,Cheruparambil; Ferreira,Alexander C.
Fonte: Sociedade Brasileira de Zoologia Publicador: Sociedade Brasileira de Zoologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2001 EN
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16.81%
A case of dimorphism among the males of the pinnotherid crab, Zaops ostreum (Say, 1817), is reported. The morphological features of the two types of males are also given.

Rediscovery of Holothuriophilus tomentosus (Ortmann) comb. nov. (Crustacea, Brachyura, Pinnotheridae) in the Brazilian coast

Melo,Gustavo Augusto S. de; Boehs,Guisla
Fonte: Sociedade Brasileira de Zoologia Publicador: Sociedade Brasileira de Zoologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2004 EN
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16.81%
Two males and one female of Holothuriophilus tomentosus (Ortmann, 1894) comb. nov. were collected in Enseada de Ratones, Florianópolis, Santa Catarina, in southern Brazil. Since its original description, as Pinnaxodes tomentosus, this species has only been collected recently, from the Pontal do Daniela, also in Florianópolis. The previously unknown male is described and the female is redescribed herein. The characteristics of this material lead us to believe that Pinnaxodes tomentosus should be transferred to the genus Holothuriophilus Nauk, 1880.

Descrição de Austinixa bragantina sp. nov. (Crustacea, Decapoda, Pinnotheridae) do litoral do Pará, Brasil

Coelho,Petrônio A.
Fonte: Sociedade Brasileira de Zoologia Publicador: Sociedade Brasileira de Zoologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/09/2005 PT
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16.81%
É apresentada a descrição de Austinixa bragantina sp. nov., encontrada no litoral paraense em associação com os calianassídeos Lepidophthalmus siriboia Felder & Rodrigues, 1993 and Callichirus major (Say, 1818)

The larval development of Pinnixa gracilipes Coelho (Decapoda, Pinnotheridae) reared in the laboratory

Lima,Jô de F.; Abrunhosa,Fernando; Coelho,Petrônio A.
Fonte: Sociedade Brasileira de Zoologia Publicador: Sociedade Brasileira de Zoologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2006 EN
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27.5%
Pinnixa gracilipes Coelho, 1997 is a small pinnotherid crab living in association with ghost shrimp Lepidophthalmus siriboia Felder & Rodrigues, 1993 in the northeastern region of Pará State, Brazil. Larvae of P. gracilipes were reared in the laboratory from hatching to the megalopa stage. The complete zoeal period averaged 24 days. Mean duration for each larval stage was 5, 4, 4, 5 and 6 days, respectively. In the present study, five zoeal and megalopal stages are described and illustrated in detail. Morphological comparisons with previous reported works on Pinnotheridae larvae are briefly discussed.

Dissodactylus crinitichelis Moreira, 1901 and Leodia sexiesperforata (Leske, 1778): first record of this symbiosis in Brazil

Queiroz,Vinicius; Sales,Licia; Neves,Elizabeth; Johnsson,Rodrigo
Fonte: Sociedade Brasileira de Carcinologia Publicador: Sociedade Brasileira de Carcinologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2011 EN
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16.81%
The crabs of the genus Dissodactylus are well known as ectosymbionts of irregular echinoids belonging to Clypeasteroida and Spatangoida. Dissodactylus crinitichelis is the only species of the genus reported in Brazil. The pea crab species has been already recorded associated with four species of echinoids in Brazilian waters. This paper reviews the known hosts for D. crinitichelis and registers for the first time the association between the pea crab and the sand dollar Leodia sexiesperforata increasing to five the number of known hosts for the crab.

New record of Clypeasterophilus stebbingi (Rathbun, 1918) (Decapoda: Brachyura: Pinnotheridae) from the east coast of Nicaragua

Hendrickx,Michel E.; Solis,Francisco
Fonte: Sociedade Brasileira de Carcinologia Publicador: Sociedade Brasileira de Carcinologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2013 EN
Relevância na Pesquisa
16.81%
The pinnotherid crab Clypeasterophilus stebbingi (Rathbun, 1918), previously known from Florida, USA, Colombia and Brazil, is reported for the first time from Central America, on the east coast of Nicaragua. A single female specimen was collected on the sand dollar Clypeaster subdepressus (Gray, 1825), at 4 m depth, among turtle grass on sandy bottom. The specimen fits well with the description provided by M.J. Rathbun and observations made on photographs of the male holotype. Comparison of the material described from Florida (including the type material), Colombia and Brazil to the Nicaragua specimen, however, indicates that C. stebbingi shows some variation in the shape of the third maxilliped.

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

Mena,Sebastián; Salas-Moya,Carolina; Wehrtmann,Ingo S.
Fonte: Sociedade Brasileira de Carcinologia Publicador: Sociedade Brasileira de Carcinologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2014 EN
Relevância na Pesquisa
27.5%
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.

Reproductive traits of the symbiotic pea crab Austinotheres angelicus (Crustacea, Pinnotheridae) living in Saccostrea palmula (Bivalvia, Ostreidae), Pacific coast of Costa Rica

Salas-Moya, Carolina; Mena, Sebastián; Wehrtmann, Ingo S.
Fonte: Pensoft Publishers Publicador: Pensoft Publishers
Tipo: Artigo de Revista Científica
Publicado em 25/11/2014 EN
Relevância na Pesquisa
27.5%
Pea crabs of the family Pinnotheridae exhibit a symbiotic life style and live associated with a variety of different marine organisms, especially bivalves. Despite the fact that pea crabs can cause serious problems in bivalve aquaculture, the available information about the ecology of these crabs from Central America is extremely limited. Therefore, the present study aimed to describe different reproductive features of the pinnotherid crab Austinotheres angelicus associated with the oyster Saccostrea palmula in the Golfo de Nicoya, Pacific coast of Costa Rica. Monthly sampling was conducted from April to December 2012. Average carapace width (CW) of the 47 analyzed ovigerous females was 7.62 mm. The species produced on average 2677 ± 1754 recently -extruded embryos with an average volume of 0.020 ± 0.003 mm3; embryo volume increased during embryogenesis by 21%, but did not vary significantly between developmental stages. Brood mass volume varied greatly (between 11.7 and 236.7 mm3), and increased significantly with female CW. Females invested on average 76.7% (minimum: 21.7%; maximum: 162.8%) of their body weight in brood production, which confirms a substantially higher energy allocation for embryo production in pinnotherid crabs compared to free-living decapods.

The larval development of Pinnixa gracilipes Coelho (Decapoda, Pinnotheridae) reared in the laboratory

LIMA, J? de Farias; ABRUNHOSA, Fernando Araujo; COELHO, Petr?nio Alves
Fonte: Universidade Federal do Pará Publicador: Universidade Federal do Pará
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
27.85%
Pinnixa gracilipes Coelho, 1997 ? um pequeno caranguejo pinoter?deo que vive em associa??o com Lepidophthalmus siriboia Felder & Rodrigues, 1993 no nordeste do Estado do Par?, Brasil. Larvas de P. gracilipes foram cultivadas em laborat?rio desde o nascimento ao est?gio megalopa. O desenvolvimento completo durou cerca de 24 dias. O per?odo m?dio de cada est?gio foi 5, 4, 4, 5 e 6 dias, respectivamente. No presente trabalho, os cinco est?gios zoeae e megalopa s?o descritos e ilustrados em detalhes. Compara??es morfol?gicas com estudos anteriores sobre larvas da fam?lia Pinnotheridae s?o brevemente discutidas.; ABSTRACT: Pinnixa gracilipes Coelho, 1997 is a small pinnotherid crab living in association with ghost shrimp Lepidophthalmus siriboia Felder & Rodrigues, 1993 in the northeastern region of Par? State, Brazil. Larvae of P. gracilipes were reared in the laboratory from hatching to the megalopa stage. The complete zoeal period averaged 24 days. Mean duration for each larval stage was 5, 4, 4, 5 and 6 days, respectively. In the present study, five zoeal and megalopal stages are described and illustrated in detail. Morphological comparisons with previous reported works on Pinnotheridae larvae are briefly discussed.

NEW RECORD OF CALYPTRAEID HOSTS FOR THE PEA CRAB CALYPTRAEOTHERES GARTHI (FENUCCI, 1975) (DECAPODA, PINNOTHERIDAE) IN ARGENTINA

Ocampo, E. H.; Nunez, J. D.; Cledon, M.; Robles, R.
Fonte: BRILL ACADEMIC PUBLISHERS; LEIDEN Publicador: BRILL ACADEMIC PUBLISHERS; LEIDEN
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
27.5%
Calyptraeotheres garthi (Fenucci, 1975) is one of nine species of Pinnotheridae occurring in Argentina and the only species of that genus located in this region. This species can be found from the San Maths Gulf, Argentina to Rio Grande do Sul, Brazil where it lives in symbiotic association with limpets of the family Calyptraeidae. Currently, two species of limpets have been reported as hosts of this species: Crepidula protea (d'Orbigny, 1841) and Crepidula argentina Simone, Pastorino & Penchaszadeh, 2000. We report here four more species of limpets serving as hosts of C. garthi, namely Bostrycapulus odites Collin, 2005, Crepidula cachimilla Cledon, Simone & Penchaszadeh, 2004, Crepidula plana Say, 1822 and Trochita pileus (Lamarck, 1822). Thus, this pinnotherid appears to be, as others members of the family, a generalist symbiotic species since it dwells on almost all the potential limpet species reported for Argentina. However, there are notable differences in prevalence of C. garthi on each host, which suggest that the symbiont might prefer species of Crepidula over the others genera (Trochita and Bostrycapulus). Additionally, there exists an apparent relationship between host size and prevalence (e.g., Crepidula cachimilla, the limpet with the highest prevalence...

Os Pinnotheridae de Santa Catarina e Rio Grande do Sul, Brasil (Decapoda, Brachyura)

Martins,Sidnei Terezinha S; D'Incao,Fernando
Fonte: Sociedade Brasileira de Zoologia Publicador: Sociedade Brasileira de Zoologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/1996 PT
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37.85%
Twelve species of Pinnotheridae from Santa Catarina and Rio Grande do Sul States, Brazil, are redeseribed and illustrated; a key of identification is presented. Clypeasterophilus stebbingi Rathbun, 1918; Pinnotheres garthi Fenucci, 1975 and Pinnixa brevipollex Rathbun, 1898 are reported for the first time for Brazil. Clypeaslerophilus stebbingi Rathbun, 1918 and Tumidotheres maculatus Say, 1818, are new record for Santa Catarina. Fabia insularis Melo, I971 and Pinnotheres emiliai Melo, 1971 are revalitaded; Fabia sebastianensis Rodrigues da Costa, 1969; Pinnotheres garthi Fenucci, 1975; Pinnotheres emiliai Melo, 1971 and Pinnixa patagoniensis Rathbun, 1918 are new records for Rio Grande do Sul. Pinnixa brevipollex Rathbun, 1898 is a new record for Santa Catarina and Rio Grande do Sul.

Occurrence of the family Pinnotheridae De Haan (Crustacea, Decapoda, Brachyura) on the coast of Ceará State, Brazil

Bezerra,Luis Ernesto A.; Almeida,Alexandre O. de; Coelho,Petrônio A.
Fonte: Sociedade Brasileira de Zoologia Publicador: Sociedade Brasileira de Zoologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2006 EN
Relevância na Pesquisa
27.5%
This study reports the occurrence of Austinixa bragantina Coelho, 2005; A. leptodactyla (Coelho, 1997) and Zaops ostreum (Say, 1817) for the State of Ceará, Northeast Brazil. These records represent the first account of the family Pinnotheridae de Haan, 1883 for the coast of Ceará. A. bragantina was collected on May and June 1995 at Futuro Beach, municipality of Fortaleza (3°42'S, 38°27'W). This species was previously known only for the type locality, Canela Island, Bragança, Pará, Brazil. A. leptodactyla was collected on November 2004 at Baleia Beach, municipality of Itapipoca (3°08'S, 39°27'W) and Z. ostreum was obtained from the oyster Crassostrea rhizophorae Guilding, 1828, collected on November 2005 at the Jaguaribe River estuary, municipality of Fortim (4°24'S, 37°46'W). Biogeographic considerations regarding the three species and an updated list of all known Brazilian pinnotherid species along with their_geographic distribution are also provided.

Os Pinnotheridae de Santa Catarina e Rio Grande do Sul, Brasil (Decapoda, Brachyura)

Martins, Sidnei Terezinha; D'Incao, Fernando
Fonte: Universidade Federal do Rio Grande Publicador: Universidade Federal do Rio Grande
Tipo: Artigo de Revista Científica
POR
Relevância na Pesquisa
37.85%
Twelve species of Pinnotheridae from Santa Catarina and Rio Grande do Sul States, Brazil, are redeseribed and illustrated; a key of identification is presented. Clypeasterophilus stebbingi Rathbun, 1918; Pinnotheres garthi Fenucci, 1975 and Pinnixa brevipollex Rathbun, 1898 are reported for the first time for Brazil. Clypeaslerophilus stebbingi Rathbun, 1918 and Tumidotheres maculatus Say, 1818, are new record for Santa Catarina. Fabia insularis Melo, I971 and Pinnotheres emiliai Melo, 1971 are revalitaded; Fabia sebastianensis Rodrigues da Costa, 1969; Pinnotheres garthi Fenucci, 1975; Pinnotheres emiliai Melo, 1971 and Pinnixa patagoniensis Rathbun, 1918 are new records for Rio Grande do Sul. Pinnixa brevipollex Rathbun, 1898 is a new record for Santa Catarina and Rio Grande do Sul.

Abbreviated larval development of Tunicotheres moseri (Rathbun, 1918) (Decapoda, Pinnotheridae), a rare case of parental care in brachyuran crabs; Desarrollo larval abreviado de Tunicotheres moseri (Rathbun, 1918) (Decapoda, Pinnotheridae), un caso raro de cuidado parental en cangrejos branquiuros

Bolaños, Juan; Hernández, Jesús; Cuesta, José A.; Hernández, Gonzalo; Felder, Darryl L.
Fonte: Consejo Superior de Investigaciones Científicas (España) Publicador: Consejo Superior de Investigaciones Científicas (España)
Tipo: Artículo
ENG
Relevância na Pesquisa
27.85%
Tunicotheres moseri (Rathbun, 1918) presents a rare case of post-hatching parental care not recorded previously among brachyuran decapods. The complete larval development takes place within a brooding enclosure of the parental female, formed by flexure of the broad abdomen against the sternum. The first crab instar is the earliest stage observed to leave this enclosure, doing so without active help from the parental female. The development of stages preceding the first crab was investigated by in vitro culture of eggs obtained from ovigerous crabs inhabiting the atrial cavity of the tunicate Phallusianigra Savigny, 1816, in Venezuela. Eggs were hatched in the laboratory and reared through two zoeal stages and the megalopa. Additional samples of the larval stages were obtained directly from abdominal enclosures of aquarium-held females. All larval stages were described and illustrated in detail. Morphological comparisons were made between larvae from two different populations. Comparisons were also made with other previously described larvae of Pinnotherinae, which led us to conclude that Tunicotheres should not be assigned to the Pinnotherinae sensu stricto. Relationships between the three known disjunct populations assigned to T.moseri remain questionable...