美国太平洋沿岸的nemerteans的多样性被认为是很好的特征,但是仍然有许多神秘的,没有描述,和“孤儿”物种(仅在幼虫形式中已知)。最近俄勒冈州和华盛顿州的nemerteans样本已经开始填补这些分类空白,但是在过去的60年里,加州的nemertean多样性受到的关注相对较少。在2019年和2020年的夏季,从加利福尼亚北部Bodega湾地区的20个地点收集了nemertean标本,美国,包括多岩石的潮间带海岸,沙滩,泥滩,和其他栖息地。基于形态学评估和DNA序列分析(部分细胞色素氧化酶I和16SrRNA基因),我们的调查确定了34种nemertean物种。其中只有13个(38%)可以放心地分配给描述的物种。另外11个代表新的科学物种,包括里塞里乌斯属的成员,Nipponnemertes,Poseidonemertes,Zygonemertes,Nemertellina,Oerstedia,和三种不确定的隶属关系。其余10种包括先前在北美太平洋海岸发现的未描述或神秘的不确定物种。我们的调查还记录了多个物种的已知地理范围的扩展,包括加利福尼亚南极洲的第一批记录,头菌,和Maculauraoregonensis。这是东北太平洋Nemertellina属和加利福尼亚Riserius属的首次报道。总的来说,我们的发现强调了在东北太平洋中,关于nemerteans的多样性和分布还有多少需要了解。
The diversity of nemerteans along the Pacific coast of the United States is regarded as well characterized, but there remain many cryptic, undescribed, and \"orphan\" species (those known only in their larval form). Recent sampling of nemerteans in Oregon and Washington has begun to fill in these taxonomic gaps, but nemertean diversity in California has received relatively little attention over the past 60 years. During the summers of 2019 and 2020, nemertean specimens were collected from 20 locations in the Bodega Bay region of northern California, USA, including rocky intertidal shores, sandy beaches, mudflats, and other habitats. Based on morphological assessment and DNA sequence analysis (partial Cytochrome Oxidase I and 16S rRNA genes), our surveys identified 34 nemertean species. Only 13 of these (38%) can be confidently assigned to described species. Another 11 represent species that are new to science, including members of the genera Riserius, Nipponnemertes, Poseidonemertes, Zygonemertes, Nemertellina, Oerstedia, and three species of uncertain affiliation. The remaining ten species include undescribed or cryptic species of uncertain status that have been found previously along the Pacific Coast of North America. Our surveys also document extensions of known geographic ranges for multiple species, including the first records in California of Antarctonemertesphyllospadicola, Cephalothrixhermaphroditica, and Maculauraoregonensis. This is the first report of the genus Nemertellina in the northeast Pacific and Riserius in California. Overall, our findings highlight how much remains to be learned about the diversity and distribution of nemerteans in the northeast Pacific.