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

被引：9
|
作者：
Scholtz, Gerhard [1 ]
Ng, Peter K. L. [2 ]
Moore, Stephen [3 ]
机构：
[1] Humboldt Univ, Inst Biol Vergleichende Zool, D-10115 Berlin, Germany
[2] Natl Univ Singapore, Fac Sci, Dept Biol Sci, Raffles Museum Biodivers Res, Singapore 117546, Singapore
[3] Univ Auckland, Landcare Res, Auckland 1, New Zealand
来源：
ARTHROPOD STRUCTURE & DEVELOPMENT | 2014年 / 43卷 / 02期
关键词：
Crustacea Decapoda; Siamese twins; Regeneration; Brain; Development; PARTHENOGENETIC MARMORKREBS DECAPODA; FRESH-WATER CRAYFISH; CONJOINED TWINS; HETEROMORPH ANTENNULE; PROCAMBARUS-CLARKII; BURROWING CRAYFISH; LARVAL DEVELOPMENT; SHRIMP DECAPODA; PANULIRUS-ARGUS; CRUSTACEAN;
D O I：
10.1016/j.asd.2013.10.007
中图分类号：
Q96 [昆虫学];
学科分类号：
摘要：
We describe a malformed specimen of the freshwater crab Amarinus locusts-is 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. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：163 / 173
页数：11
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