Overview of species in family Ampharetidae collected from the Falkland Islands in this study have been split into 3 tables below. Key given in Reuscher et al. (2009) was used to determine generic identifications (different taxonomic source may lead to different idenitifications). For simplicity, all posterior body segments bearing uncini, but lacking notopodia and/or notochaetae are considered abdominal uncinigers (in contrast, Imajima et al. (2012) suggested that segments which lack notopodia but have neuropodia shaped as in thoracic uncinigers are considered intermediate uncinigers and excluded from the count of abdominal uncinigers).
Table. 1 Characters in species of subfamily Ampharetinae with paleae present found in this study (Key: TC-thoracic chaetigers, TU-thoracic uncinigers, AU-abdominal uncinigers)
|
Species Subfamily Ampharetinae |
No. of TC + paleae
|
No. of TU |
No. of AU |
Paleae (form) |
No. of branchial pairs |
Arrangement of branchiae (each side) |
Shifted notopodia |
Other diagnostic character/s |
|
Anobothrus sp. 1 |
14 +P |
12 |
12 |
Stout gradually tapering into thin tips |
4 |
3+1; separated by a narrow gap |
slightly on TU-8, connected by ridge |
circular band present on TU-2 |
|
Anobothrus cf. glandularis |
14 +P |
12 |
13 |
Thin with very long tips, increasing in size, shorter to about the same length as notochaetae |
4 |
3 on a raised ridge + 1 |
slightly on TU-8, connected by ridge |
circular band present on TU-3 |
|
Eclysippe sp. 1 |
15 +P |
12 |
12 |
Thin, long reaching the anterior end of prostomium |
3 |
in one row on raised ridge |
- |
posterior thoracic chaetigers elongated, margin of lower mouth |
|
Lysippe sp. 1 |
16 +P |
13 |
12 |
small, thin |
4 |
arranged on a raised ridge |
- |
margin of lower lip crenulated, body slender |
|
Lysippe sp. 2 |
16 +P |
13 |
>9 |
small, thin |
4 |
arranged on a raised ridge |
- |
margin of lower lip crenulated, body inflated, prostomium with pigmented spots |
|
Lysippe cf. fragilis |
17+P |
14 |
8 |
small, thin |
4 |
3+1; separated by a small gap |
- |
with large brown patches on prostomium |
|
Ampharete sp. 1 |
14 +P |
12 |
13 |
stout rapidly tapering into very thin, long tip; long, reaching the anterior end of prostomium |
4 |
3+1; well separated by a gap |
- |
buccal tentacles papillose; AU 1-5 with dorsal cirri (most prominent in AU 2-5) |
|
Amphicteis sp. 1 |
17+P |
14 |
15 |
extremely long, stout gradually tapering into thin tips |
4 |
2+2; separated by a small gap |
- |
with prostomial glandular ridges; with rudimentary abdominal notopodia |
|
Tanseimaruana sp. 1 |
17+P |
14 |
? |
long, slender gradually tapering into thin tips |
4 |
arranged on a raised ridge |
- |
first abdominal unciniger with 4 dorsal foliose lobes |
|
Eusamythella sexdentata |
14+P |
12 |
15 |
stout, distally strongly bent and tapering into acute tip |
3 |
1+2; separated by a gap |
- |
raised dorsal ridge on TU-2 |
Table. 2 Characters in species of subfamily Ampharetinae without paleae found in this study (Key: TC-thoracic chaetigers, TU-thoracic uncinigers, AU-abdominal uncinigers, ? marks missing information for respective character)
|
Species Subfamily Ampharetinae |
No. of TC |
No. of TU |
No. of AU |
No. of branchial pairs |
Arrangement of branchiae |
Other diagnostic character/s |
|
Amage sculpta |
14 |
11 |
10 |
4 |
2+1+1; separated by a wide gap |
rudimentary abdominal notopodia present |
|
Samytha sp. 1 |
17 |
14 |
11? |
3 |
2+1; separated by a small gap |
crenulated lower lip |
|
Glyphanostomum sp. 1 |
14 |
11 |
24 |
3 |
1+2; well separated by a gap |
prostomium appears hood-like; posterior thoracic chaetigers elongated; tube annulated |
|
Samythella sp. 1 |
15 |
12 |
27 |
3 |
in one row on raised ridge |
Indistinct dorsal ridge on TC 3; with papilla-like notopodia in abdomen |
|
Samythella sp. 2 |
15 |
12 |
17 |
3 |
in one row on raised ridge |
with papilla-like notopodia in abdomen |
Table 3. Characters of species of subfamily Melinninae found in this study.
|
Body width (mm) |
Prostomium |
Serration on dorsal membrane |
Form of thoracic uncini |
Tube |
|
|
Melinna arnaudi |
1.8 |
wide lobe, no eyes |
5-7; sharp, triangular |
4 teeth in single vertical row (formula: 1-1-1-1) |
fine mud, sparsely ornamented with larger particles or shell fragments |
|
Melinna sp. 1 |
0.8 |
square shaped, anteriorly slightly concave, with many pigmented eyespots |
10, blunt, subtriangular |
3 teeth in a single row plus 2 smaller teeth distally (formula: 1-1-1-2) |
Thin layer of mud, with dense coverage of small particles |
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