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The anatomy of the king crab Hapalogaster mertensii Brandt, 1850 (Anomura: Paguroidea: Hapalogastridae): new insights into the evolutionary transformation of hermit crabs into king crabs Naturalis
Keiler, J.; Richter, S.; Wirkner, C.S..
The emergence of king crabs from a hermit crab-like ancestor is one of the most curious events in decapod evolution. King crabs comprise two taxa, Lithodidae and Hapalogastridae, and while lithodids have formed the focus of various anatomical studies, the internal anatomy of hapalogastrids has never been studied although this group might represent a more ancestral morphological condition within king crabs than lithodids do. To better understand the evolutionary transformation of pagurid-like hermit crabs into king crabs, we studied the hemolymph vascular system and associated organs of representatives of Hapalogaster and present here the first micro-computer tomography data pertaining to the internal anatomy of hapalogastrids. Our results for...
Tipo: Article / Letter to the editor Palavras-chave: Anomala; Carcinization; Circulatory system; Evolutionary morphology; Structural coherence; Variability; 42.74; 38.22; 42.62.
Ano: 2015 URL: http://www.repository.naturalis.nl/record/579455
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Revealing their innermost secrets: an evolutionary perspective on the disparity of the organ systems in anomuran crabs (Crustacea: Decapoda: Anomura) Naturalis
Keiler, J.; Richter, S.; Wirkner, C.S..
The Southern Australian crustacean species Lomis hirta (Lomisoidea: Lomisidae) is a representative of one of the three anomuran taxa which obtained their crab-like habitus independently from each other. This process, the evolutionary transformation into a crab-like form, is termed carcinization. To shed light on the morphological changes which took place during carcinization and to investigate structural dependence (coherence) between external and internal morphological characters, we studied L. hirta and representatives of its putatively most closely related taxa, Aegla cholchol (Aegloidea: Aeglidae) and Kiwa puravida (Chirostyloidea: Kiwaidae). External and internal anatomy was studied using microcomputertomography and computer-aided 3D reconstruction....
Tipo: Article / Letter to the editor Palavras-chave: Aegla; Anomala; Carcinization; Evolutionary morphology; Hemolymph vascular system; Kiwa; Lomis; Nervous system.
Ano: 2016 URL: http://www.repository.naturalis.nl/record/619253
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Evolution of crabs – history and deconstruction of a prime example of convergence Naturalis
Scholtz, G..
Compared with the elongate bodies of shrimps or lobsters, crabs are characterised by a compact body organisation with a depressed, short carapace and a ventrally folded pleon. The evolutionary transformation from a lobster-like crustacean towards a crab is called ‘carcinization’ and has been interpreted as a dramatic morphological change. Nevertheless, the crab-shape evolved convergently in a number of lineages within Decapoda. Accordingly, numerous hypotheses about internal and external factors have been presented, which all try to explain these frequent convergent carcinization events despite the seemingly fundamental changes in the body organisation. However, what a crab is lies greatly in the eye of the beholder and most of the hypotheses about the...
Tipo: Article / Letter to the editor Palavras-chave: Achelata; Anomala; Brachyura; Carcinization; Convergent evolution; Morphological concepts; 21.21; 42.74.
Ano: 2014 URL: http://www.repository.naturalis.nl/record/471315
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Descripción de las larvas de tercer instar de Melolonthidae (Coleoptera) asociadas al cultivo de Agave tequilana var. Azul y su fluctuación poblacional en Jalisco, México Neotropical Entomology
García,Gabriel L; Ortega-Arenas,Laura; Hernández,Héctor G; García,Agustín A; Nápoles,Jesús R; Cortés,Ramón R.
Se describen las larvas de tercer instar de seis especies de gallinas ciegas asociadas al cultivo de agave tequilero en el estado de Jalisco, México, con base en 1,145 especimenes, de muestras de suelo, colectados de Septiembre de 2006 a Agosto de 2007, en los municipios de Ixtlahuacán del Río, Tepatitlán de Morelos y San Juan de Escobedo, Jalisco, México. Se incluyen ilustraciones diagnósticas y una clave para el reconocimiento de las especies. Cyclocephala comata (Bates) fue la especie más abundante (63.2%), seguida por Phyllophaga ravida (Blanchard) (21.9%), Phyllophaga polyphylla (Bates) (9.4%), Phyllophaga misteca (Bates) (4.1%), Strategus aloeus (L.) (1.1%) y Anomala hoepfneri (Bates) (0.3%). Phyllophaga ravida y A. hoepfneri se reportan por primera...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phyllophaga; Cyclocephala; Anomala; Gallina ciega.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2009000600010
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