Ampharete Malmgren 1865
Updated key to North Atlantic species of Ampharete The presented key for described species constitutes an update of the key 2 proposed by Parapar et al. (2019), based on species descriptions from Holthe (1986) and Parapar et al. (2012, 2018), following the term intermediate uncinigers after Imajima...
| Main Authors: | , , , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
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Zenodo
2022
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| Subjects: | |
| Online Access: | https://doi.org/10.5281/zenodo.6992816 http://treatment.plazi.org/id/2F1987D97057876870AA8FD1FA46FDF4 |
| Summary: | Updated key to North Atlantic species of Ampharete The presented key for described species constitutes an update of the key 2 proposed by Parapar et al. (2019), based on species descriptions from Holthe (1986) and Parapar et al. (2012, 2018), following the term intermediate uncinigers after Imajima et al. (2012). Accordingly, intermediate uncinigers are excluded from the abdominal segment count. Branchial gap: width as number of branchial base, following Parapar et al. (2018). We excluded A. lindstroemi Malmgren, 1867 (part.) in Hessle, 1917 sensu Parapar et al . (2012) from this key, an undescribed species (Parapar et al ., 2018), even though a brief diagnosis was given in Parapar et al. (2012). 1. Paleae stout basally (Figs 2, 3C). 2 - Paleae slender and evenly tapering to long filiform tips or absent (Figs 5A, 6A,B,D,E). 5 2. Pygidium with one pair of short lateral lobes only; branchial gap absent; paleae gradually but quickly tapering to comparatively long filiform tips (rarely missing). A. villenai Parapar, Helgason, Jirkov & Moreira, 2012 - Pygidium otherwise (with 2 long cirri and short papillae or with 2 short lateral lappets and a number of long anal cirri); paleae abruptly tapering to very short filiform tips (usually missing). 3 3. 2 intermediate uncinigers (IU) and 14–16 abdominal uncinigers (AU); prostomium with 2 small eyespots, branchial gap present (1); pygidium with 2 long cirri and a number of short papillae. A. goesi (Malmgren, 1865) - 2 IU and 12 or less AU. 4 4. Branchial gap present (1.5); 10 AU; pygidium with 2 short, wide lateral lappets and about 8 thin long anal cirri. A. acutifrons (Grube, 1860) - Branchial gap absent or very narrow (<0.5); 11 (seldom 12) AU; pygidium with 2 long cirri and a number of small, round papillae; prostomium usually with 2 eyespots. A. finmarchica (Sars, 1865) sensu Holthe (1986) 5. Rudimental notopodia on 2 IU enlarged. 6 - All rudimental notopodia of similar size. 7 6. Gap between branchial groups as wide as width of group; 10 AU. A. falcata Eliason, ... |
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