Description of ten additional ossicles in the foregut of the freshwater crabs Sylviocarcinus pictus and Valdivia serrata (Decapoda: Trichodactylidae)
ABSTRACT The morphology of stomach ossicles of decapod crustaceans provides valuable information on their phylogeny and biology. We herein described ten new ossicles in the foreguts of two trichodactylid crabs, Sylviocarcinus pictus (H. Milne-Edwards, 1853) and Valdivia serrata White, 1847, in addit...
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Sociedade Brasileira de Zoologia
2017-10-01
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| Series: | Zoologia (Curitiba) |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702017000100312&lng=en&tlng=en |
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| author | Renata C. Lima-Gomes Jô de Farias Lima Célio Magalhães |
| author_facet | Renata C. Lima-Gomes Jô de Farias Lima Célio Magalhães |
| author_sort | Renata C. Lima-Gomes |
| collection | DOAJ |
| description | ABSTRACT The morphology of stomach ossicles of decapod crustaceans provides valuable information on their phylogeny and biology. We herein described ten new ossicles in the foreguts of two trichodactylid crabs, Sylviocarcinus pictus (H. Milne-Edwards, 1853) and Valdivia serrata White, 1847, in addition to previously described 38 ossicles, which are also recognized and listed. Five specimens each of S. pictus and V. serrata were selected for morphological analysis of gastric ossicles. The stomachs were obtained after removing the carapace, and they were fixed in 10% formalin for 24 hours. After this procedure, the stomachs were immersed in a solution of 10% Potassium Hydroxide (KOH) and heated to 100 °C during 60 minutes for tissue maceration. At this point, the clean skeletons were colored by adding 1% Alizarin Red to the KOH solution in order to facilitate visualization of the internal structures such as the setae and ossicles. The ten new ossicles are: dorsomedial cardiac plate; dorsolateral cardiac plate; suprapectineal lateral ossicle; inferior cardiac valve; lateral mesopyloric ossicle; ampullary roof-medium portion ossicle; process of the ampullary roof-upper portion; lateral-inferior post-ampullary plate; pleuro-pyloric valve’s ossicle; and lateral pleuro-pyloric plate. Some ossicles are thin plates that together with the main ossicles assist in the structure and support of the stomach, which are similar in the two species studied herein. The current knowledge on gastric ossicles will be useful in establishing taxonomic characters, which can evaluate phylogenetic relationships among brachyuran crabs. |
| first_indexed | 2024-04-11T02:26:40Z |
| format | Article |
| id | doaj.art-2b0c89b11d0c4a44a61860ccb8a3aef1 |
| institution | Directory Open Access Journal |
| issn | 1984-4689 |
| language | English |
| last_indexed | 2024-04-11T02:26:40Z |
| publishDate | 2017-10-01 |
| publisher | Sociedade Brasileira de Zoologia |
| record_format | Article |
| series | Zoologia (Curitiba) |
| spelling | doaj.art-2b0c89b11d0c4a44a61860ccb8a3aef12023-01-02T22:23:53ZengSociedade Brasileira de ZoologiaZoologia (Curitiba)1984-46892017-10-0134010.3897/zoologia.34.e13731S1984-46702017000100312Description of ten additional ossicles in the foregut of the freshwater crabs Sylviocarcinus pictus and Valdivia serrata (Decapoda: Trichodactylidae)Renata C. Lima-GomesJô de Farias LimaCélio MagalhãesABSTRACT The morphology of stomach ossicles of decapod crustaceans provides valuable information on their phylogeny and biology. We herein described ten new ossicles in the foreguts of two trichodactylid crabs, Sylviocarcinus pictus (H. Milne-Edwards, 1853) and Valdivia serrata White, 1847, in addition to previously described 38 ossicles, which are also recognized and listed. Five specimens each of S. pictus and V. serrata were selected for morphological analysis of gastric ossicles. The stomachs were obtained after removing the carapace, and they were fixed in 10% formalin for 24 hours. After this procedure, the stomachs were immersed in a solution of 10% Potassium Hydroxide (KOH) and heated to 100 °C during 60 minutes for tissue maceration. At this point, the clean skeletons were colored by adding 1% Alizarin Red to the KOH solution in order to facilitate visualization of the internal structures such as the setae and ossicles. The ten new ossicles are: dorsomedial cardiac plate; dorsolateral cardiac plate; suprapectineal lateral ossicle; inferior cardiac valve; lateral mesopyloric ossicle; ampullary roof-medium portion ossicle; process of the ampullary roof-upper portion; lateral-inferior post-ampullary plate; pleuro-pyloric valve’s ossicle; and lateral pleuro-pyloric plate. Some ossicles are thin plates that together with the main ossicles assist in the structure and support of the stomach, which are similar in the two species studied herein. The current knowledge on gastric ossicles will be useful in establishing taxonomic characters, which can evaluate phylogenetic relationships among brachyuran crabs.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702017000100312&lng=en&tlng=enAmazonanatomyforegutmorphologyNeotropicalstomachValdiviini |
| spellingShingle | Renata C. Lima-Gomes Jô de Farias Lima Célio Magalhães Description of ten additional ossicles in the foregut of the freshwater crabs Sylviocarcinus pictus and Valdivia serrata (Decapoda: Trichodactylidae) Zoologia (Curitiba) Amazon anatomy foregut morphology Neotropical stomach Valdiviini |
| title | Description of ten additional ossicles in the foregut of the freshwater crabs Sylviocarcinus pictus and Valdivia serrata (Decapoda: Trichodactylidae) |
| title_full | Description of ten additional ossicles in the foregut of the freshwater crabs Sylviocarcinus pictus and Valdivia serrata (Decapoda: Trichodactylidae) |
| title_fullStr | Description of ten additional ossicles in the foregut of the freshwater crabs Sylviocarcinus pictus and Valdivia serrata (Decapoda: Trichodactylidae) |
| title_full_unstemmed | Description of ten additional ossicles in the foregut of the freshwater crabs Sylviocarcinus pictus and Valdivia serrata (Decapoda: Trichodactylidae) |
| title_short | Description of ten additional ossicles in the foregut of the freshwater crabs Sylviocarcinus pictus and Valdivia serrata (Decapoda: Trichodactylidae) |
| title_sort | description of ten additional ossicles in the foregut of the freshwater crabs sylviocarcinus pictus and valdivia serrata decapoda trichodactylidae |
| topic | Amazon anatomy foregut morphology Neotropical stomach Valdiviini |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702017000100312&lng=en&tlng=en |
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