Evolutionary morphology of the hemolymph vascular system in hermit and king crabs (Crustacea: Decapoda: Anomala)

Keiler, Jonas; Richter, Stefan; Wirkner, Christian S.

doi:10.1002/jmor.20174

Cited by 10 publications

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“…A subsequent morphologically-based phylogenetic study by Richter and Scholtz [56] supported this same evolutionary view of pagurid and lithodid evolution. Recently, a study that examines the hemolymph vascular system in hermit and king crabs found close similarities in arterial systems of the dorsal cephalothorax [57]. …”

Section: Discussionmentioning

confidence: 99%

“…A recent study comparing hermit and king crab circulatory systems identified several vascular changes that occurred as the result of carcinization, arguing for more comparative studies that look at morphology (both internal and external) and development [57]. However, only with a clear phylogenetic hypothesis can many of these studies be correctly interpreted.…”

Section: Discussionmentioning

confidence: 99%

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A comprehensive and integrative reconstruction of evolutionary history for Anomura (Crustacea: Decapoda)

et al. 2013

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BackgroundThe infraorder Anomura has long captivated the attention of evolutionary biologists due to its impressive morphological diversity and ecological adaptations. To date, 2500 extant species have been described but phylogenetic relationships at high taxonomic levels remain unresolved. Here, we reconstruct the evolutionary history—phylogeny, divergence times, character evolution and diversification—of this speciose clade. For this purpose, we sequenced two mitochondrial (16S and 12S) and three nuclear (H3, 18S and 28S) markers for 19 of the 20 extant families, using traditional Sanger and next-generation 454 sequencing methods. Molecular data were combined with 156 morphological characters in order to estimate the largest anomuran phylogeny to date. The anomuran fossil record allowed us to incorporate 31 fossils for divergence time analyses.ResultsOur best phylogenetic hypothesis (morphological + molecular data) supports most anomuran superfamilies and families as monophyletic. However, three families and eleven genera are recovered as para- and polyphyletic. Divergence time analysis dates the origin of Anomura to the Late Permian ~259 (224–296) MYA with many of the present day families radiating during the Jurassic and Early Cretaceous. Ancestral state reconstruction suggests that carcinization occurred independently 3 times within the group. The invasion of freshwater and terrestrial environments both occurred between the Late Cretaceous and Tertiary. Diversification analyses found the speciation rate to be low across Anomura, and we identify 2 major changes in the tempo of diversification; the most significant at the base of a clade that includes the squat-lobster family Chirostylidae.ConclusionsOur findings are compared against current classifications and previous hypotheses of anomuran relationships. Many families and genera appear to be poly- or paraphyletic suggesting a need for further taxonomic revisions at these levels. A divergence time analysis provides key insights into the origins of major lineages and events and the timing of morphological (body form) and ecological (habitat) transitions. Living anomuran biodiversity is the product of 2 major changes in the tempo of diversification; our initial insights suggest that the acquisition of a crab-like form did not act as a key innovation.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

A comprehensive and integrative reconstruction of evolutionary history for Anomura (Crustacea: Decapoda)

et al. 2013

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“…The morphology of the hemolymph circulatory systems of arthropods, especially of decapods, has been studied in great detail in recent years (e.g., Keiler, Richter, & Wirkner, , ; McGaw & Reiber, ; McGaw & Stillman, ). However, what has actually been studied in detail is the hemolymph vascular system (i.e., the heart and the arteries), only one of the two constituent subsystems of the hemolymph circulatory system (Wirkner et al, ; Wirkner, Tögel, & Pass, ).…”

Section: Introductionmentioning

confidence: 99%

“…Decapods are known to show the highest degree of complexity in vascular systems within Mandibulata (Keiler et al, , ; McGaw & Reiber, ; Wirkner et al, ), which implies that hemolymph flow has to be accurately and precisely maintained in the various body regions. As the vascular system constitutes only half of the circulatory system, it can be assumed that a specialized and defined lacunar system is equally important for maintaining this precision of hemolymph flow.…”

Section: Introductionmentioning

confidence: 99%

The circulatory system of Penaeus vannamei Boone, 1931—Lacunar function and a reconsideration of the “open vs. closed system” debate

Göpel

Wirkner

2020

Journal of Morphology

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The morphology of hemolymph circulatory systems has been studied in many arthropod groups over the past decades. In most cases, however, the focus of these studies has been the vascular system, while its counterpart, the lacunar system, has often been neglected. To further understanding of the interrelationships between these two complementary subsystems, we investigated both, the hemolymph vascular system and the hemolymph lacunar system, of the decapod Penaeus vannamei using 3Dimaging techniques (micro-computed tomography and confocal laser scanning microscopy) in combination with 3D reconstruction. Major parts of the vascular and lacunar system are described. Our insights into their morphology are used to derive functional conclusions for a model illustrating the interrelationships between the two subsystems. The morphology of and the functional interaction between the vascular and lacunar systems are discussed in the context of the debate on "open vs. closed circulatory systems." K E Y W O R D S

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“…Recent studies have demonstrated that vascular systems in certain arthropod taxa, such as certain Malacostraca (Sandemann, ; McGaw, ; McGaw and Duff, ; Wirkner and Richter, ; Huckstorf and Wirkner, ; Keiler et al, ), certain Chilopoda (Wirkner and Pass, ) and also many Chelicerata (Wirkner and Prendini, ; Klußmann‐Fricke et al, ; Huckstorf et al, ; Göpel and Wirkner, ) are highly complex. In some arachnopulmonate taxa, this level of complexity has been observed, not only in the hemolymph vascular systems (HVS) in general, but especially in the arterial systems of the prosomal ganglion.…”

Section: Introductionmentioning

confidence: 99%

Comparative morphology of the hemolymph vascular system in Uropygi and Amblypygi (Arachnida): Complex correspondences support Arachnopulmonata

Klußmann-Fricke

Wirkner

2016

Journal of Morphology

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Although the circulatory system of arthropods has long been considered as rather simple, recent studies have demonstrated that in certain arthropod taxa, such as Malacostraca, some Chilopoda and also many Chelicerata, the vascular systems in particular are rather complex. Furthermore, a recent study has revealed that the prosomal ganglion of scorpions and spiders is supplied by an intricate network of arteries, the complexity of which bears a close resemblance to that of vertebrate capillary systems. In this study, we analyzed the hemolymph vascular systems of various species of Pedipalpi (i.e., Amblypygi and Uropygi). By combining modern techniques, such as MicroCT and cLSM, with computer-based 3D-reconstruction, we were able to produce comprehensive visualizations and descriptions of the vascular systems. Despite the lack of well-corroborated phylogenetic hypotheses on arachnid relationships and the controversial assertion of relationships between the pulmonate arachnids, we aim to elucidate the evolution of complex vascular systems in Arachnida. By comparing these highly complex vascular systems not only with each other, but also with other pulmonate arachnids, we found numerous detailed correspondences in the general branching pattern as well as in the supply patterns of the prosomal ganglion. We argue that these numerous and detailed correspondences by their absence in other arachnids i.e. aplumonates, support Arachnopulmonata. J. Morphol. 277:1084-1103, 2016. © 2016 Wiley Periodicals, Inc.

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Evolutionary morphology of the hemolymph vascular system in hermit and king crabs (Crustacea: Decapoda: Anomala)

Cited by 10 publications

References 0 publications

A comprehensive and integrative reconstruction of evolutionary history for Anomura (Crustacea: Decapoda)

A comprehensive and integrative reconstruction of evolutionary history for Anomura (Crustacea: Decapoda)

The circulatory system of Penaeus vannamei Boone, 1931—Lacunar function and a reconsideration of the “open vs. closed system” debate

Comparative morphology of the hemolymph vascular system in Uropygi and Amblypygi (Arachnida): Complex correspondences support Arachnopulmonata

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