南海磷虾科长螯磷虾属Stylocheiron一新纪录种的形态特征*

doi:10.11978/2024174

Abstract

Abstract:

The genus Stylocheiron (Malacostraca: Euphausiacea: Euphausiidae) comprises 12 species reported worldwide. This study identifies a newly recorded species of Stylocheiron from the South China Sea, Stylocheiron armatum Colosi, 1917. Detailed morphological descriptions are provided, and comparative analysis and discussion with the closely related species Stylocheiron carinatum are presented. The specimens are deposited in the Marine Biodiversity Collections of the South China Sea, Chinese Academy of Sciences.

Key words: krill, Stylocheiron, morphological taxonomy, the third thoracic leg, South China Sea

CLC Number:

Q959.223

ZHOU Zhiqian, LIAN Xiping, TAN Yehui. Morphological characteristics of a newly recorded species of the genus Stylocheiron (Euphausiidae) from the South China Sea^*[J].Journal of Tropical Oceanography, 2025, 44(3): 66-71.

Figures/Tables 5

Tab. 1

Fig. 1

Fig. 2

Tab. 2

Fig. 3

References 19

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海域	站号	网具	网目	水层	经度	纬度	标本号
南海西部	S0501	中型浮游生物网	169μm	0~200m	110.9988°E	16.9992°N	SCSMBC057679
南海西部	S0501	中型浮游生物网	169μm	0~200m	110.9988°E	16.9992°N	SCSMBC057680
南海西部	S0501	中型浮游生物网	169μm	0~200m	110.9988°E	16.9992°N	SCSMBC057681
南海东北部	G2	多联浮游生物分层拖网	300μm	100~200m	115.9954°E	18.0120°N	SCSMBC057682
南海东北部	G2	多联浮游生物分层拖网	300μm	50~100m	115.9954°E	18.0120°N	SCSMBC057683
南海东北部	B7	多联浮游生物分层拖网	300μm	50~100m	118.9952°E	21.0030°N	SCSMBC057684

标本号	性别	体长/mm	眼长/mm	额角长/mm	头胸甲长/mm	第六腹节比例
SCSMBC057679	雌性	10.99	1.05	1.11	2.76	2.06
SCSMBC057680	雌性	7.42	0.77	0.71	1.46	2.03
SCSMBC057681	雄性	7.17	0.67	0.69	1.16	1.93
SCSMBC057682	雌性	9.80	0.79	0.81	1.87	2.10
SCSMBC057683	雄性	7.03	0.72	0.69	1.10	2.07
SCSMBC057684	雌性	8.61	0.71	0.83	1.54	2.11

Morphological characteristics of a newly recorded species of the genus Stylocheiron (Euphausiidae) from the South China Sea^*

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Morphological characteristics of a newly recorded species of the genus Stylocheiron (Euphausiidae) from the South China Sea*

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Morphological characteristics of a newly recorded species of the genus Stylocheiron (Euphausiidae) from the South China Sea^*