First descriptions of copepodid stages, sexual dimorphism and intraspecific variability of Mesocletodes Sars, 1909 (Copepoda, Harpacticoida, Argestidae), including the description of a new species with broad abyssal distribution
First descriptions of copepodid stages, sexual dimorphism and intraspecific variability of Mesocletodes Sars, 1909 (Copepoda, Harpacticoida, Argestidae), including the description of a new species with broad abyssal distribution
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DOI：
10.3897/zookeys.96.1496
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发表时间：
2011-01-01
期刊：
影响因子：
1.3
通讯作者：
Menzel, Lena
中科院分区：
文献类型：
--
作者：
Menzel, Lena
Mesocletodes Sars，1909 a包括37种。初步证据种内变异性和两性异形已被证实的77标本中的中脊甲elmarisp. n。从不同的深海区域，和个体发育首次被跟踪。无体性是指在雌性刚毛上有一个强的小刺状羽片，与基部融合，P2-P4 exp 3近端外刚毛缺失，P1-P4 enp 2极度伸长，分叉支伸长，雌性身体有刺状外观，雌性P2-P4 enp 2近端内刚毛缺失。种内变异包括体的刺状突起、体的大小、背足的刚毛和刺状突起。成年雌性的性二形变化包括身体多刺的外观，P1 enp超过exp的长度，P1基节外部扩大，从突出的突起中产生的基部刚毛，身体体节的透明褶边华丽。雄性成虫的性二型性表现为较小的体型，单头A1，P2-P4 enp 2和P5 exp上有2根内刚毛，P5基内足叶有2根刚毛。一些修改允许桡足类阶段的性别鉴定。雌性A1在CV中完全发育，雄性A1在最后一次蜕皮时经历了广泛的修改。P1-P4在CV Mesocletodes faroerensis和Mesocletodes thielei中完全发育，缺乏Mesodetodes的无形态，被排除在外。
Mesocletodes Sars, 1909a encompasses 37 species to date. Initial evidence on intraspecific variability and sexual dimorphism has been verified for 77 specimens of Mesodetodes elmari sp. n. from various deep-sea regions, and ontogenetic development has been traced for the first time. Apomorphies are a strong spinule-like pinna on the nix seta that is fused to the basis, P2-P4 exp3 proximal outer seta lost, PI-P4 enp2 extremely elongated, furcal rami elongated, female body of prickly appearance, female P2-P4 enp2 proximal inner seta lost. Intraspecific variability involves spinulation, ornamentation and size of the body and setation and spinulation of pereiopods. Sexually dimorphic modifications of adult females include prickly appearance of the body, P1 enp exceeds exp in length, P1 coxa externally broadened, seta of basis arising from prominent protrusion, hyaline frills of body somites ornate. Sexual dimorphism in adult males is expressed in smaller body size, haplocer A1, 2 inner setae on P2-P4 enp2 and on P5 exp, P5 basendopodal lobe with 2 setae. Some modifications allow sexing of copepodid stages. The female A1 is fully developed in CV, the male A1 undergoes extensive modifications at the last molt. P1-P4 are fully developed in CV Mesocletodes faroerensis and Mesocletodes thielei lack apomorphies of Mesodetodes and are excluded.