A crab with three eyes, two rostra, and a dorsal antenna-like structure

We describe a malformed specimen of the freshwater crab Amarinus lacustris from New Zealand. With three eyes in a horizontal row, two rostra, and a dorsal antenna-like structure, the pattern of malformation of this animal is unique and has not been described before. A careful inspection and descript...

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Bibliographische Detailangaben
Veröffentlicht in:	Ventricular Restraint Improves Outcomes in HF Patients with CRT. - 2011. - Amsterdam [u.a.]
1. Verfasser:	Scholtz, Gerhard (VerfasserIn)
Weitere Verfasser:	Ng, Peter K.L. (BerichterstatterIn), Moore, Stephen (BerichterstatterIn)
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2014transfer abstract
Zugriff auf das übergeordnete Werk:	Ventricular Restraint Improves Outcomes in HF Patients with CRT
Schlagworte:	Regeneration Brain Crustacea Decapoda Siamese twins Development
Umfang:	11


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520			\|a We describe a malformed specimen of the freshwater crab Amarinus lacustris from New Zealand. With three eyes in a horizontal row, two rostra, and a dorsal antenna-like structure, the pattern of malformation of this animal is unique and has not been described before. A careful inspection and description of external and internal structures, in particular the central nervous system, were carried out. These revealed, in addition to the external abnormalities, a retarded brain with a hypertrophied and backwards bent protocerebrum connected with all three eyes and putatively with the dorsal antenna-like structure. Based on these data, a variety of hypotheses about the causes for this kind of malformation are discussed. A scenario combining a conjoined twin (Duplicitas anterior) based on the duplication of the embryonic anterior head lobes and a regeneration event leading to the replacement of an eye by an antenna shows the best fit to the observed patterns.
520			\|a We describe a malformed specimen of the freshwater crab Amarinus lacustris from New Zealand. With three eyes in a horizontal row, two rostra, and a dorsal antenna-like structure, the pattern of malformation of this animal is unique and has not been described before. A careful inspection and description of external and internal structures, in particular the central nervous system, were carried out. These revealed, in addition to the external abnormalities, a retarded brain with a hypertrophied and backwards bent protocerebrum connected with all three eyes and putatively with the dorsal antenna-like structure. Based on these data, a variety of hypotheses about the causes for this kind of malformation are discussed. A scenario combining a conjoined twin (Duplicitas anterior) based on the duplication of the embryonic anterior head lobes and a regeneration event leading to the replacement of an eye by an antenna shows the best fit to the observed patterns.
650		7	\|a Regeneration \|2 Elsevier
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700	1		\|a Ng, Peter K.L. \|4 oth
700	1		\|a Moore, Stephen \|4 oth
773	0	8	\|i Enthalten in \|n Elsevier Science \|t Ventricular Restraint Improves Outcomes in HF Patients with CRT \|d 2011 \|g Amsterdam [u.a.] \|w (DE-627)ELV015921530
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856	4	0	\|u https://doi.org/10.1016/j.asd.2013.10.007 \|3 Volltext
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