南海细足磷虾属Hansarsia的分类学研究*

doi:10.11978/2024110

Abstract

Abstract:

Species of the genus Hansarsia play crucial roles in marine planktonic ecosystems, but there is often confusion and misidentification. This paper employed morphological analysis methods to conduct in-depth research on the specimens of the genus Hansarsia collected by the Marine Biodiversity Collections of the South China Sea, Chinese Academy of Sciences, from the South China Sea and the East Indian Ocean, aiming to clarify differences between species and resolve taxonomic confusions. This paper a) supplemented and revised the characterizations of H. tenella, H. gracilis, H. microps, and H. atlantica; b) depicted the changes in the first and second thoracic legs of the four species from juvenile to adult; c) pointed out the phenomenon of two rostrum shapes in the adult H. gracilis, and the variation in the number of setae on the propodus of the first thoracic leg; and d) clarified the distinctions between H. microps and H. atlantica in the South China Sea and the East Indian Ocean.

Key words: krill, Hansarsia, morphology, taxonomy, the first thoracic leg

CLC Number:

P735.532

ZHOU Zhiqian, LIAN Xiping, TAN Yehui. Taxonomic research of the genus Hansarsia from the South China Sea^*[J].Journal of Tropical Oceanography, 2025, 44(2): 100-114.

Figures/Tables 16

Fig. 1

Fig. 2

Tab. 1

Fig. 3

Fig. 4

Fig. 5

Tab. 2

Specimen measurement of Hansarsia gracilis"

采样海域	发育状态	性别	体长/mm	眼/mm	额角/mm	头胸甲/mm
东印度洋	成体	雌性	10.075	0.607	0.788	3.210
东印度洋	亚成体	雌性	9.045	0.663	0.775	2.111
东印度洋	亚成体	雌性	8.786	0.511	0.673	2.151
南海	亚成体	雌性	9.210	0.651	0.544	2.376
东印度洋	亚成体	雌性	9.445	0.658	0.762	2.422
东印度洋	成体	雌性	15.248	0.968	0.899	4.326
南海	成体	雌性	11.985	0.669	0.665	2.799
南海	亚成体	雌性	9.732	0.638	0.548	2.542
南海	成体	雌性	12.350	0.844	0.768	3.294
东印度洋	成体	雌性	12.338	0.777	0.692	3.083
南海	亚成体	雌性	10.651	0.684	0.671	2.412
南海	成体	雌性	13.010	0.795	0.787	3.470
东印度洋	成体	雌性	14.154	0.822	0.748	3.781
东印度洋	成体	雌性	9.941	0.689	0.707	2.689
南海	成体	雌性	11.077	0.547	0.582	2.822
南海	成体	雌性	11.916	0.577	0.820	2.969
南海	成体	雌性	10.887	0.575	0.644	2.545
东印度洋	成体	雌性	13.268	0.843	0.841	3.507
南海	成体	雌性	13.654	0.816	0.758	3.760
南海	成体	雌性	13.262	0.892	0.693	3.806
南海	成体	雌性	9.732	0.717	0.555	2.390
南海	成体	雌性	13.095	0.898	0.582	3.448
南海	成体	雌性	11.490	0.822	0.462	2.994
南海	成体	雌性	13.879	0.927	0.597	3.694
东印度洋	成体	雌性	12.281	0.873	0.538	3.248
南海	成体	雌性	11.552	0.788	0.463	3.033
东印度洋	成体	雌性	13.819	0.937	0.609	3.665
东印度洋	成体	雌性	13.431	0.883	0.462	3.478
东印度洋	成体	雌性	14.655	0.920	0.550	4.245
东印度洋	成体	雌性	14.530	0.927	0.584	4.083
东印度洋	成体	雌性	14.558	0.923	0.559	4.238
东印度洋	成体	雌性	14.758	0.710	0.481	4.194
南海	成体	雌性	13.260	0.863	0.497	3.818
南海	成体	雌性	13.029	0.931	0.582	3.767
东印度洋	成体	雌性	14.074	0.925	0.624	4.021
东印度洋	成体	雌性	13.682	0.859	0.581	4.110
东印度洋	成体	雌性	13.720	0.834	0.552	3.649
东印度洋	成体	雌性	13.978	0.920	0.469	3.966
东印度洋	成体	雌性	13.905	0.907	0.601	4.167
南海	成体	雌性	12.748	0.984	0.543	3.437
东印度洋	亚成体	雄性	9.235	0.618	0.622	2.295
南海	成体	雄性	10.003	0.715	0.590	2.514
南海	成体	雄性	10.880	0.725	0.558	2.874
南海	成体	雄性	10.316	0.698	0.552	2.400
南海	成体	雄性	10.781	0.747	0.561	2.550
南海	成体	雄性	10.874	0.656	0.766	2.586
南海	成体	雄性	11.607	0.763	0.517	2.856
南海	成体	雄性	10.913	0.715	0.624	2.662
南海	成体	雄性	10.645	0.749	0.501	2.665
南海	成体	雄性	11.258	0.650	0.309	2.565
东印度洋	成体	雄性	11.781	0.780	0.374	2.978
南海	成体	雄性	11.030	0.799	0.390	2.827
南海	成体	雄性	11.606	0.790	0.406	2.960
南海	成体	雄性	11.623	0.816	0.328	3.113
东印度洋	成体	雄性	11.904	0.769	0.303	2.983
南海	成体	雄性	10.894	0.767	0.400	2.840
南海	成体	雄性	11.663	0.835	0.334	2.908
东印度洋	成体	雄性	10.925	0.778	0.406	2.675
南海	成体	雄性	12.089	0.768	0.338	2.895
东印度洋	成体	雄性	11.904	0.749	0.412	3.051
东印度洋	亚成体	雄性	9.606	0.716	0.550	2.428
东印度洋	亚成体	雄性	9.816	0.731	0.604	2.561
东印度洋	成体	雄性	10.277	0.713	0.676	2.409
南海	成体	雄性	10.500	0.633	0.657	2.392
南海	成体	雄性	9.959	0.620	0.593	2.293
南海	成体	雄性	11.038	0.685	0.499	2.598
南海	亚成体	雄性	9.370	0.701	0.408	2.287

Tab. 2

Fig. 6

Tab. 3

Fig. 7

Tab. 4

Fig. 8

Fig. 9

Fig. 10

Fig. 11

Fig. 12

References 36

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采样海域	发育状态	性别	体长/mm	眼/mm	额角/mm	头胸甲/mm
东印度洋	成体	雌性	14.340	1.087	1.251	2.989
南海	亚成体	雌性	7.620	0.610	0.838	1.626
南海	亚成体	雌性	9.415	0.614	0.836	1.877
东印度洋	亚成体	雌性	10.213	0.717	0.864	2.268
东印度洋	亚成体	雌性	9.621	0.667	0.989	1.850
东印度洋	亚成体	雌性	8.792	0.658	0.848	1.935
南海	亚成体	雌性	8.323	0.631	0.734	1.696
南海	亚成体	雌性	8.229	0.727	0.905	1.903
南海	亚成体	雌性	7.682	0.628	0.951	1.491
东印度洋	亚成体	雌性	7.727	0.631	0.842	1.652
南海	成体	雌性	11.437	0.930	1.109	2.431
南海	成体	雌性	15.504	0.985	1.321	3.510
东印度洋	成体	雌性	10.430	0.776	0.880	2.165
东印度洋	成体	雌性	12.274	0.865	1.033	2.638
东印度洋	成体	雌性	17.876	1.036	1.248	4.407
东印度洋	成体	雌性	12.931	0.865	1.160	2.967
东印度洋	成体	雌性	14.152	0.868	1.163	2.934
东印度洋	亚成体	雌性	10.488	0.736	0.978	2.103
东印度洋	成体	雌性	17.899	1.118	1.373	4.206
东印度洋	成体	雌性	16.500	1.158	1.157	3.932
东印度洋	成体	雌性	11.677	0.883	0.974	2.574
东印度洋	成体	雌性	13.788	0.934	1.017	2.841
东印度洋	成体	雄性	14.765	0.847	1.269	3.087
东印度洋	成体	雄性	15.437	1.113	0.761	3.504

Taxonomic research of the genus Hansarsia from the South China Sea^*

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Taxonomic research of the genus Hansarsia from the South China Sea*

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Taxonomic research of the genus Hansarsia from the South China Sea^*