First Report of Three Ampharetinae Malmgren, 1866 Species from Korean Subtidal Waters, Including Genetic Features of Histone H3 and Descriptions of Two New Species
This study reports two new species of <i>Ampharete</i> and one new record of a species of <i>Amphicteis</i> (Ampharetidae) from the Korean subtidal zone, based on an integrative approach. <i>Ampharete koreana</i> sp. nov. is characterized by paleal chaetae several...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-02-01
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| Series: | Diversity |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-2818/17/2/122 |
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| Summary: | This study reports two new species of <i>Ampharete</i> and one new record of a species of <i>Amphicteis</i> (Ampharetidae) from the Korean subtidal zone, based on an integrative approach. <i>Ampharete koreana</i> sp. nov. is characterized by paleal chaetae several times thicker than notochaetae, with short filamentous tips. It more closely resembles <i>A. finmarchica</i> but differs in the shape of its paleae, interbranchial gap, thoracic uncini, and pygidial cirri and shows a 2% genetic divergence in histone H3 and in 18% of mtCOI genes. <i>Ampharete namhaensis</i> sp. nov. shares with <i>A. petersenae</i> the absence of paleae and the presence of 16 abdominal uncinigers, a rare combination of traits among known <i>Ampharete</i> species. However, <i>A. petersenae</i> differs in having a marked interbranchial gap, prominent eyes on the prostomium, double the number of abdominal uncini and buccal tentacles, and in its distribution (southern Korea for <i>A. namhaensis</i> sp. nov. vs. North Atlantic and Arctic-adjacent waters for <i>A. petersenae</i>). The Korean <i>Amphicteis</i> specimens examined in this study closely resemble <i>A. glabra</i> in key morphological features, including fine paleae tips, 14 thoracic and 15 abdominal uncinigers, and approximately eight paleae. However, given the need for a comprehensive revision of <i>Amphicteis</i> and the potential for cryptic diversity within the genus, these specimens are provisionally designated as <i>Amphicteis</i> sp. cf. <i>A. glabra</i>. |
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| ISSN: | 1424-2818 |