| 摘要: |
| 颚足钩虾属 Maxillipius (端足目,颚足钩虾科 Family Maxillipiidae)中,迄今仅有2种,即直尾颚足钩虾 Maxillipius rectitelson Ledoyer和共栖颚足钩虾 Maxillipius commensalis Ledoyer。直尾颚足钩虾的模式标本采自马达加斯加,仅有雌体。虽然后来Ledoyer(1986)又进行了补充描记,但因缺乏雄体标本,使该种的描述不完善。作者在海南岛潮间带采集中,获得较多该种标本,仅雄体就有27个,并发现雄、雌第1触角形态表现为雌、雄异形(sexual dimorphism)。这与Thomas (1996)所描述的Maxillipius commensalis Ledoyer雌、雄体形态差异相似,即在雄体第1触角第3柄节上具柄突(callynophore),该柄突在 Maxillipiidae 科中为 Maxillipius 属区别于 Maxillipides 属的主要特征。
本文为直尾颚足钩虾 Maxillipius rectitelson Ledoyer 的补充描述。 |
| 关键词: 海南岛、颚足钩虾科、端足目、雌雄异形 |
| DOI： |
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| 基金项目:中国科学院海洋研究所调查研究报告第3070号 |
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| SUPPLEMENTAL DESCRIPTION OF MAXILLIPIUS RECTITELSON LEDOYER (CRUSTACEA: AMPHIPODA, MAXILLIPIIDAE) FROM HAINAN ISLAND (SOUTH CHINA SEA) |
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Ren Xianqiu
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Institute of Oceanology,Chinese Academy of Sciences
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| Abstract: |
| Maxillipius rectitelson Ledoyer, 1973: 32, pls. 4, 5: 1986: 819, fig. 320; Thomas, 1996:316.
Material: Linchang Reef and Meixia, Hainan Island. 27♂♂, large body 2. 8mm in length; 46♀♀, large body 2. 6mm in length. Collected from littoral zone.8-11, April, 1992.
The present female specimens are similar to those described by Ledoyer(1973, 1986).The males were found for the first time by the present author.
There are 27 male specimens in my collections. The male body is similar to female in main structures; but sexual dimorphism in the antenna 1 was found in the males. The male antenna 1 is similar to that of Maxillipius commensalis Lowry (See Thomas, 1996),in having a callynophore on the 3rd peduncular article, which could differentiate the Genus Maxillipius from Maxillipides in the family Maxillipiidae.
Male antenna 1 shorter than antenna 2, peduncular article 1 longer than wide, terminal margin with short setae; peduncular article 2 slightly short, length subequal to width; peduncular article 3 slender, subequal to twice of peduncular article 2 in length, outer lateral side with an elongate triangular prosses(called callynophore by Thomas), extended to near terminal end of second flagellar article, lateral sides with long aesthetascs;flagellar article 1 elongate, with 5-6 small internal articles; flagellum slender, 23-articulated, each article longer than wide, without aesthetascs. Peduncular article 5 of antenna 2 longer than peduncular article 4, flagellum 15-articulated.
The species differs from Maxillipius commensalis Lowry by coxa 2 bearing blunt anterior margin, by the carpus and propodus of gnathopod 1 being broad and short, by the collynophore of male antennal being long and bearing more aesthetascs.
The present species is recorded for the first time from China Sea.
Distribution South China Sea, Madagascar. |
| Key words: Maxillipius, South China Sea |
