The foregut-ossicle system of Dromia wilsoni, Dromia personata and Lauridromia intermedia (Decapoda, Brachyura, Dromiidae), studied with a new staining method

Brösing, Andreas; Richter, Stefan; Scholtz, Gerhard

doi:10.1016/s1467-8039(02)00009-9

Cited by 36 publications

(53 citation statements)

References 22 publications

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“…The mouthparts of the juvenile I present increasing setae numbers in the endopods. The juvenile stomach became more calcified and visibly complex, with similar characteristics to those found in the foregut of adult decapods described in the scientific literature (Meiss and Norman, 1977;Kunze andAnderson, 1979: Suthers andAnderson, 1981;Mikami and Takashima, 1993;Brösing et al 2002). This indicates that juvenile of L. siriboia became more agile in food capture and they are capable to process solid food available in their bentonic ambient.…”

Section: Developmental Morphology Of Mouthparts and Foregut Of The Lasupporting

confidence: 70%

Developmental morphology of mouthparts and foregut of the larvae and postlarvae of Lepidophthalmus siriboia Felder & Rodrigues, 1993 (Decapoda: Callianassidae)

et al. 2006

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In this study, the gross morphology of the mouthparts and foregut of the ghost shrimp Lepidophthalmus siriboia were investigated from larvae and postlarvae reared in the laboratory. The mouthparts (maxillae and maxillipeds) of the zoeae have a reduced number of setae and spines (or is absent in some individuals), and the foregut, under developed, have few minute setae in the cardiac and pyloric chambers. In contrast, after the metamorphosis into megalopa stage, all feeding appendages have many setae and, the foregut shows a well-developed gastric mill with strong lateral teeth. In the juvenile stage occurs an increase of setae and spines in the mouthparts and the foregut becomes more specialized. These observations strongly suggest that a lecithotrophic development occurs during all zoeal stages but the megalopa and juvenile stages are feeding animals. The functional morphology of the feeding structures of L. siriboia and other decapods will be briefly discussed. KEYWORDSCallianassidae, Lepidophthalmus siriboia, mouthparts, foregut, morphology. Morfologia funcional dos apêndices bucais e do estômago de larvas e pós-larvas de Lepidophthalmus siriboia

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Section: Developmental Morphology Of Mouthparts and Foregut Of The Lasupporting

confidence: 70%

Developmental morphology of mouthparts and foregut of the larvae and postlarvae of Lepidophthalmus siriboia Felder & Rodrigues, 1993 (Decapoda: Callianassidae)

et al. 2006

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“…This means that the monophyly of the classical brachyuran "families" and related ranks (with the notable exception of the "Majidae") is basically supported by this analysis (see Brösing et al, 2007). In contrast to previous accounts of the analysis of the brachyuran fossil record (e.g., Schweitzer & Feldman, 2005) I follow a strict phylogenetic reasoning, i.e., I accept only monophyletic groups -and this is also the case for the discussion of extinction events.…”

Section: Resultssupporting

confidence: 54%

“…] analysis of Brösing et al (2007). For the sake of simplicity in the following discussion, it is assumed that this is also true for fossil "family" groupings although this is not always clear.…”

Section: Resultsmentioning

confidence: 99%

“…Gordon, 1963;Števčić, 1971a, b;Guinot, 1977Guinot, , 1978Guinot, , 1979Števčić & Gore, 1981;Rice, 1983;Martin & Abele, 1986;De Saint Laurent, 1989;Spears et al, 1992;Jamieson, 1994;Jamieson et al, 1995;Marques & Pohle, 1995Bellwood, 1996;Guinot et al, 1998;Harrison & Crespi, 1999;Sternberg et al, 1999;Schubart et al, 2000a, b;Guinot & Tavares, 2001Rosenberg, 2001;Sternberg & Cumberlidge, 2001;Brösing et al, 2002Brösing et al, , 2007Tavares, 2003;Ahyong et al, 2007).…”

Section: Introduction and Methodsmentioning

confidence: 99%

“…I use the results of the cladistic analysis of Brösing et al (2007) (figs. 1, 2) as a framework for the discussion of the brachyuran fossil record.…”

Section: Introduction and Methodsmentioning

confidence: 99%

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A reconstruction of an evolutionary scenario for the Brachyura (Decapoda) in the Context of the Cretaceous-Tertiary boundary

Brösing¹

2008

Crustac

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In this article, I map the currently known brachyuran fossil record on a recent cladogram of Brachyura, the true crabs. The hypothesis of brachyuran phylogenetic relationships is based on a cladistic analysis of brachyuran foregut characters. With this approach, the following scenario of the evolution of Brachyura is proposed. The representatives of Brachyura that occur earliest in the fossil record (Dromioidea) take the most basal position in the cladogram, followed by Homolidae. These taxa reach their highest species diversity during the Cretaceous, together with Raninidae and Cymonomidae sensu lato. The analysis reveals that the majority of the "higher" crabs (Xanthoidea, Portunidae, Cancridae, and Oxystomata sensu lato) as well as their common ancestor existed already by the end of the Cretaceous. In particular, a constant increase of brachyuran species diversity has been registered from the Eocene to the Miocene. Most taxa of the Brachyura (with the exception of the Carcineretidae) remained unaffected by the events at the Cretaceous-Tertiary-boundary. Hence, the data suggest the events at the K/T-boundary have had a weaker influence on the species diversity of the Brachyura and of the Decapoda in general, than originally presumed: i.e., there was no massextinction of crabs. ZUSAMMENFASSUNGDie vorgestellte Hypothese, resultierend aus der kladistischen Analyse von Merkmalen der Vorderdarm-Morphologie, wurde mit dem gegenwärtig bekannten Fossilbericht verglichen. Basierend auf diesem Ansatz wird folgendes evolutives Szenario für die Stammesgeschichte der Brachyura vorgeschlagen. Die Vertreter der Brachyura mit den frühesten bekannten fossilen Vorkommen (Dromioidea) nehmen auch in der kladistischen Analyse die basale Position ein, gefolgt von den Homolidae. Diese Taxa zeigen zusammen mit den Raninidae und den Cymonomidae ihre größte Artenvielfalt während der Kreidezeit. Es ist ebenfalls anzunehmen, daß die Mehrheit der "höheren Krabben" (Vertreter der Xanthoidea, Portunidae, der Cancridae und der Oxystomata) ebenso ihr gemeinsamer Vorfahre schon am Ende der Kreidezeit existierten. Besonders vom Eozän zum Miozän 2 ) Present address: Technische Universität Ilmenau, Institut für Physik, Weimarer Str. 32, D-98684 Ilmenau, Germany; e-mail: andreas.broesing@tu-ilmenau.de © Koninklijke Brill NV, Leiden, 2008 Crustaceana 81 (3): 271-287 Also available online: www.brill.nl/cr 272 ANDREAS BRÖSING ist ein Anstieg der Artenvielfalt zu verzeichnen. Innerhalb der neu vorgeschlagenen Neobrachyura sind neben den traditionellen Thoracotremata zusätzliche Taxa mit kontrovers diskutierten phylogenetischen Verwandschaftsbeziehungen zusammengefaßt. Für die ursprünglich beschriebenen Thoracotremata (Ocypodidae, Mictyridae, Gecarcinidae und Grapsidae) kann basierend auf Merkmalen der Gonoporen in beiden Geschlechtern von einem monophyletischen Ursprung ausgegangen werden. Nach Vorlage der verfügbaren Daten wird ein Event an der Kreide-Tertiärgrenze angenommen, welches einen kleineren Einfluß auf die Artenvielfalt der Brachy...

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Gastric teeth of some thoracotreme crabs and their contribution to the brachyuran phylogeny

Brösing

Türkay

2011

Journal of Morphology

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The gastric teeth of three ocypodoid species were investigated using scanning electron microscopy, and the morphological results were discussed with respect to the known food preferences. The species were chosen in particular because of contrasting ideas about their relationships within the Thoracotremata. For the genera Heloecius, Dotilla, Mictyris, and ''Uca'' (s. str.), we find a specific correlation of the gastric teeth with the suspension feeding. The lateral gastric teeth of Uca have no prominent lateral teeth cusps, and most of their teeth surface consists of transverse comb-like lamellae. However, this possible food adaptation does not exclude the usability of specific teeth characters to distinguish species of suspension feeders. The closer relationship of the Dotillidae to grapsoid lines of gecarcinid or sesarmid crabs suggested by molecular data is not supported by the gastric teeth. For the genus Ucides, we found several characters that distinguish Ucides from the remaining ocypodoid genera Heloecius, Dotilla, Mictyris, and ''Uca.'' In particular, the structures of the lateral and the dorsomedian teeth show some similarities to genera of the Gecarcinidae and Sesarmidae. Our results suggest that foregut characters can be used for phylogenetic analyses.

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The foregut-ossicle system of Dromia wilsoni, Dromia personata and Lauridromia intermedia (Decapoda, Brachyura, Dromiidae), studied with a new staining method

Cited by 36 publications

References 22 publications

Developmental morphology of mouthparts and foregut of the larvae and postlarvae of Lepidophthalmus siriboia Felder & Rodrigues, 1993 (Decapoda: Callianassidae)

Developmental morphology of mouthparts and foregut of the larvae and postlarvae of Lepidophthalmus siriboia Felder & Rodrigues, 1993 (Decapoda: Callianassidae)

A reconstruction of an evolutionary scenario for the Brachyura (Decapoda) in the Context of the Cretaceous-Tertiary boundary

Gastric teeth of some thoracotreme crabs and their contribution to the brachyuran phylogeny

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