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Evolution of mantis shrimps (Stomatopoda, Malacostraca) in the light of new Mesozoic fossils

BACKGROUND: We describe new specimens of Mesozoic mantis shrimps (Stomatopoda, Malacostraca) that exhibit morphological and developmental information previously unknown. RESULTS: Specimens assigned to the taxon Sculda exhibit preserved pleopods, thoracopods including all four raptorial limbs as well...

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Autores principales: Haug, Joachim T, Haug, Carolin, Maas, Andreas, Kutschera, Verena, Waloszek, Dieter
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2955030/
https://www.ncbi.nlm.nih.gov/pubmed/20858249
http://dx.doi.org/10.1186/1471-2148-10-290
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author Haug, Joachim T
Haug, Carolin
Maas, Andreas
Kutschera, Verena
Waloszek, Dieter
author_facet Haug, Joachim T
Haug, Carolin
Maas, Andreas
Kutschera, Verena
Waloszek, Dieter
author_sort Haug, Joachim T
collection PubMed
description BACKGROUND: We describe new specimens of Mesozoic mantis shrimps (Stomatopoda, Malacostraca) that exhibit morphological and developmental information previously unknown. RESULTS: Specimens assigned to the taxon Sculda exhibit preserved pleopods, thoracopods including all four raptorial limbs as well as details of antennae and antennulae. The pleopods and the antennulae resemble those of the modern mantis shrimps, but the raptorial limbs are not as differentiated as in the modern species. In some specimens, the first raptorial limb (second thoracopod) is not significantly larger than the similar-sized posterior three pairs (as in extant species), but instead these appendages become progressively smaller along the series. In this respect they resemble certain Palaeozoic stomatopods. Another specimen, most likely belonging to another species, has one pair of large anterior raptorial thoracopods, a median-sized pair and two more pairs of small-sized raptorial appendages and, thus, shows a new, previously unknown type of morphology. A single specimen of Pseudosculda laevis also exhibits the size of the raptorial limbs; they are differentiated as in modern species, one large pair and three small pairs. Furthermore, we report additional larval specimens and show also post-larval changes, e.g., of the tail fan. CONCLUSIONS: These new data are used to reconsider the phylogeny of Stomatopoda. We still need a strict taxonomical revision of the Mesozoic mantis shrimps, but this first examination already demonstrates the importance of these fossils for understanding mantis shrimp evolution and the interpretation of evolutionary pathways of particular features.
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spelling pubmed-29550302010-10-15 Evolution of mantis shrimps (Stomatopoda, Malacostraca) in the light of new Mesozoic fossils Haug, Joachim T Haug, Carolin Maas, Andreas Kutschera, Verena Waloszek, Dieter BMC Evol Biol Research Article BACKGROUND: We describe new specimens of Mesozoic mantis shrimps (Stomatopoda, Malacostraca) that exhibit morphological and developmental information previously unknown. RESULTS: Specimens assigned to the taxon Sculda exhibit preserved pleopods, thoracopods including all four raptorial limbs as well as details of antennae and antennulae. The pleopods and the antennulae resemble those of the modern mantis shrimps, but the raptorial limbs are not as differentiated as in the modern species. In some specimens, the first raptorial limb (second thoracopod) is not significantly larger than the similar-sized posterior three pairs (as in extant species), but instead these appendages become progressively smaller along the series. In this respect they resemble certain Palaeozoic stomatopods. Another specimen, most likely belonging to another species, has one pair of large anterior raptorial thoracopods, a median-sized pair and two more pairs of small-sized raptorial appendages and, thus, shows a new, previously unknown type of morphology. A single specimen of Pseudosculda laevis also exhibits the size of the raptorial limbs; they are differentiated as in modern species, one large pair and three small pairs. Furthermore, we report additional larval specimens and show also post-larval changes, e.g., of the tail fan. CONCLUSIONS: These new data are used to reconsider the phylogeny of Stomatopoda. We still need a strict taxonomical revision of the Mesozoic mantis shrimps, but this first examination already demonstrates the importance of these fossils for understanding mantis shrimp evolution and the interpretation of evolutionary pathways of particular features. BioMed Central 2010-09-21 /pmc/articles/PMC2955030/ /pubmed/20858249 http://dx.doi.org/10.1186/1471-2148-10-290 Text en Copyright ©2010 Haug et al; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Haug, Joachim T
Haug, Carolin
Maas, Andreas
Kutschera, Verena
Waloszek, Dieter
Evolution of mantis shrimps (Stomatopoda, Malacostraca) in the light of new Mesozoic fossils
title Evolution of mantis shrimps (Stomatopoda, Malacostraca) in the light of new Mesozoic fossils
title_full Evolution of mantis shrimps (Stomatopoda, Malacostraca) in the light of new Mesozoic fossils
title_fullStr Evolution of mantis shrimps (Stomatopoda, Malacostraca) in the light of new Mesozoic fossils
title_full_unstemmed Evolution of mantis shrimps (Stomatopoda, Malacostraca) in the light of new Mesozoic fossils
title_short Evolution of mantis shrimps (Stomatopoda, Malacostraca) in the light of new Mesozoic fossils
title_sort evolution of mantis shrimps (stomatopoda, malacostraca) in the light of new mesozoic fossils
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2955030/
https://www.ncbi.nlm.nih.gov/pubmed/20858249
http://dx.doi.org/10.1186/1471-2148-10-290
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