The morphology of cardiac and pyloric foregut of Aegla platensis Schmitt (Crustacea: Anomura: Aeglidae)

Castro, Teresa; Bond-Buckup, Georginam

doi:10.24199/j.mmv.2003.60.7

Cited by 11 publications

(9 citation statements)

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“…MARTIN et al (1998) carried out a descriptive and comparative study of the main ossicles of Austinograea williamsi Hessler & Martin, 1879 but, unfortunately, the authors did not provide a complete description. In another study, the morphological description of a freshwater decapod related to the genus Aegla Leach, 1820 (Anomura) was described by CASTRO & BOND-BUCKUP (2003). These authors recorded 22 ossicles and noticed the presence of paired of oesophageal valves and thorns in the anterior margin of the zygocardiac (V), characteristics not observed in any other species considered here.…”

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confidence: 75%

“…The morphological and functional aspects of decapod crustacean stomachs have been examined extensively in adult specimens in order to understand the correct operation of the digestive processes of each group (MEISS & NORMAN 1977, KUNZE & ANDERSON 1979, SUTHERS & ANDERSON 1981, SUTHERS 1984, SKILLETER & ANDERSON 1986, MIKAMI & TAKASHIMA 1993, PINN et al 1999, JHA & HOMECHAUDHURI 2001, BRÖSING et al 2002, CASTRO & BOND-BUCKUP 2003. However, few investigations concentrated on the biology and ecology of freshwater species, particularly with respect to the morphology of the stomach.…”

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confidence: 99%

“…study and juveniles of the anomuran Aegla platensis Scmitt, 1942 by (CASTRO & BOND-BUCKUP 2003), as well as juveniles of king crab Paralithodes camtschaticus (Tilesius, 1815), P. brevipes (H. Milne Edwards & Lucas, 1841) and P. platypus Blandt, 1850(ABRUNHOSA & KITTAKA 1997, which differed only in their smaller number of ossicles. Few studies, however, are related to the description of the foreguts of freshwater crabs.…”

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confidence: 99%

“…According to CASTRO & BOND-BUCKUP (2003), the presence or absence of certain ossicles in the anomuran A. platensis may be related to fusion between ossicles separated in other species. Despite resulting in a lesser total number of ossicles, the foregut of A. platensis is still complex and suitable to macrophagy and predation, as in the species of the present study.…”

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confidence: 99%

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Foregut morphology of Pseudothelphusidae and Trichodactylidae (Decapoda: Brachyura) from northeastern Pará, Brazil

Alves¹,

Abrunhosa²,

Lima³

2010

Zoologia (Curitiba, Impr.)

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ABSTRACT. The gross morphology of foregut was investigated and described in detail for four freshwater crab species: a pseudothelphusid, Fredius reflexifrons (Ortmann, 1897) and three trichodactylids -Sylviocarcinus pictus (H. MilneEdwards, 1853), Valdivia serrata White, 1847, and Dilocarcinus septemdentatus (Herbst, 1783). In general, the gastric mills of freshwater crabs showed a similar degree of complexity in relation to other marine species of Anomura and Brachyura previously described in the literature. However, significant morphological differences were observed among the analyzed species, as in ossicle numbers, features and connection types. A total of 38 ossicles were described for S. pictus and V. serrata and 37 ossicles for D. septemdentatus and F. reflexifrons, respectively. The latter species can be distinguished from the others by the presence of a wide cardiac sac resembling two sacs. Most of the ossicles were connected through a rigid connection, and few ossicles were fused. The degree of calcification varied little among the studied species. The differences found among the species suggest that the morphological aspects of the foregut may be useful in the identification of similar species.

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Foregut morphology of Pseudothelphusidae and Trichodactylidae (Decapoda: Brachyura) from northeastern Pará, Brazil

Alves¹,

Abrunhosa²,

Lima³

2010

Zoologia (Curitiba, Impr.)

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“…Many studies have focused on the morphological and functional aspects of the foregut in adult decapod specimens (Meiss and Norman 1977, Kunze and Anderson 1979, Suthers and Anderson 1981, Suthers 1984, Skilleter and Anderson 1986, Mikami and Takashima 1993, Pinn et al 1999, Jha and Homechaudhuri 2001, Brosing et al 2002, Castro and Bond-Buckup 2003, however, very few efforts to investigate these aspects in the larval stages have been undertaken in the past. Therefore, in this present study, the morphology of the larval foreguts of two decapod crabs from the Northern Brazil, Uca vocator Herbst 1804 (Ocypodidae) and Panopeus occidentalis Saussure 1857 (Xanthidae) were investigated, and the functionality of these organs is discussed in detail.…”

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confidence: 99%

Development and functional morphology of the larval foregut of two brachyuran species from Northern Brazil

Abrunhosa

Simith

Monteiro

et al. 2011

An. Acad. Bras. Ciênc.

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Feeding is an important factor for the successful rearing of larvae of the crab species. Further information on the morphological features of the foregut may to reveal larval feeding behaviour and or/whether there is a lecithotrophy in some or even in all stages of the larval cycle. In the present study, the structural development of the foregut and their digestive functions were examined in larvae of two brachyurans, Uca vocator and Panopeus occidentalis, reared in the laboratory. During larval development, the foreguts of the larvae in the first and last zoeal stages and in the megalopa stage were microscopically examined, described and illustrated. The zoeal foreguts of both species were well developed, showing specialization with a functional cardiopyloric valve and a filter press. The megalopa stage had a complex and specialized gastric mill similar to that found in adult crabs with the appearance of rigidly calcified structures. These results support the hypothesis that the feeding behaviour of each larval stage is directly related to the morphological structure of the foregut. Such facts strongly indicate that all larval stages of both U. vocator and P. occidentalis need an external food source before completing the larval development in a planktonic environment.

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Selecting and ranking areas for conservation ofAegla(Crustacea: Decapoda: Anomura) in southern South America integrating biogeography, phylogeny and assessments of extinction risk

Tumini

Giri

Williner

et al. 2019

Aquatic Conservation

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1. The rapid degradation of freshwater habitats in southern South America may cause the extinction of the endemic species of Aegla, as well as other freshwater species and components of riverside environments related to them. Information on the distribution of species and their conservation status is essential for developing conservation strategies.2. The updated distribution of Aegla in its southernmost distribution was analysed in order to prioritize freshwater ecoregions, applying biogeographical, phylogenetic and conservation status and complementarity approaches. 3. The distributions of the species of Aegla were delineated on maps and plotted against freshwater ecoregions. A data matrix of areas versus species was constructed and a taxon-area cladogram was created. Ecoregions were ranked, based on their species richness and using a complementarity criterion, to create a list of those considered important for conservation. The conservation status of Aegla species was assessed on the basis of the categories and criteria of the International Union for Conservation of Nature (IUCN) to produce a decreasing order of the risk of species extinction. These assessments were combined to define a consensus ranking of the priority areas for conservation. 4. The areas of maximum species richness and endemicity, and consequently highest priority of conservation, were the Lower Parana and Patagonia ecoregions. The Cuyan Desaguadero and Mar Chiquita Salinas Grandes ecoregions were the areas of second priority, and the Chaco and Lower Uruguay ecoregions were the areas with the third priority for conservation. Ten out of the 20 species analysed fall within the threat categories of the IUCN. Sixty per cent of the species of Aegla analysed have at least one population contained in protected areas.5. The results obtained may be used to design strategies for implementing conservation policies on freshwater species, generate biogeographical atlases and contribute to selecting Ramsar sites.

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The morphology of cardiac and pyloric foregut of Aegla platensis Schmitt (Crustacea: Anomura: Aeglidae)

Cited by 11 publications

References 10 publications

Foregut morphology of Pseudothelphusidae and Trichodactylidae (Decapoda: Brachyura) from northeastern Pará, Brazil

Foregut morphology of Pseudothelphusidae and Trichodactylidae (Decapoda: Brachyura) from northeastern Pará, Brazil

Development and functional morphology of the larval foregut of two brachyuran species from Northern Brazil

Selecting and ranking areas for conservation ofAegla(Crustacea: Decapoda: Anomura) in southern South America integrating biogeography, phylogeny and assessments of extinction risk

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