Taxonomic classification of species reported along the Western European margin.

Note:
1State of knowledge, key:
5  =  very well known (>80% described, identification guides <20 years old, and good taxonomic expertise).
4  =  well known (>70% described, identification guides <50 years old, good taxonomic expertise).
3  =  poorly known (<50% species described, identification guides old or incomplete, moderate taxonomic expertise).
2  =  very poorly known (only few species recorded, no identification guides, little taxonomic expertise).
1  =  unknown (no species recorded, no identification guides, no expertise).

备注：
1. 认知状态（State of knowledge）评分标准如下：
5分：认知度极高（已描述物种占比超80%，分类鉴定指南发布年限不足20年，且具备优质的分类学专业能力）
4分：认知度良好（已描述物种占比超70%，分类鉴定指南发布年限不足50年，具备优质的分类学专业能力）
3分：认知度较差（已描述物种占比不足50%，分类鉴定指南老旧或不完善，仅具备中等水平的分类学专业能力）
2分：认知度极差（仅记录有少量物种，无可用分类鉴定指南，分类学专业储备不足）
1分：完全未知（未记录任何物种，无分类鉴定指南，无相关专业研究能力）