2
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Description of ten additional ossicles in the foregut of the freshwater crabs Sylviocarcinus pictus and Valdivia serrata (Decapoda: Trichodactylidae)

      , ,

      Zoologia

      Pensoft Publishers

      Read this article at

      ScienceOpenPublisher
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          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.

          Related collections

          Most cited references 9

          • Record: found
          • Abstract: not found
          • Article: not found

          Phylogenetic analysis of the Brachyura (Crustacea, Decapoda) based on characters of the foregut with establishment of a new taxon

            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            Recent developments on the morphology of the brachyuran foregut ossicles and gastric teeth

            The complexity of the brachyuran foregut, in particular the foregut ossicles and gastric teeth, were investigated and documented in 66 brachyuran taxa employing a new staining method. The brachyuran groundpattern is proposed to consist of 41 ossicles. Most of the ossicles show a very conservative pattern with only a few variations. A previous classification scheme proposed by Nauck (1880) with the grouping of the recent brachyuran crabs in Heterodontea and Cyclodontea is not supported by this study. The study also shows that the Heterodontea and Cyclodontea are not monophyletic.
              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              Feeding Structures of Two Atyid Shrimps, with Comments on Caridean Phylogeny

                Bookmark

                Author and article information

                Journal
                Zoologia
                Zoologia
                Pensoft Publishers
                1984-4689
                June 13 2017
                June 13 2017
                : 34
                : 1-7
                Article
                10.3897/zoologia.34.e13731
                © 2017

                Comments

                Comment on this article