Rhamphobrachium
- Dataset
- Minibrachium, a new subgenus of Rhamphobrachium (Annelida: Onuphidae) from Australia with the description of three new species
- Rank
- GENUS
Classification
- kingdom
- Animalia
- phylum
- Annelida
- class
- Polychaeta
- order
- Eunicida
- family
- Onuphidae
- genus
- Rhamphobrachium
Rhamphobrachium
Key to subgenera of Rhamphobrachium and species of R. (Minibrachium) n. subg.
1 Peristomial cirri absent; branchiae absent; lower limbate chaetae simple, spinigers absent; subacicular hooks with spiny hoods from chaetiger 3–5, gradually changing to typical subacicular hooks by about chaetiger20....... R. (Minibrachium) n. subg3
- Peristomial cirri and branchiae present; subacicular hooks from chaetiger 10–16.................................... 2
2. (1) Peristomial cirri inserted far apart; lower limbate chaetae pseudocompound to compound (= spinigers); maximum of two subacicular hooks per parapodium; Mx VI absent................................................... R. (Spinigerium)
- Peristomial cirri inserted close together; all limbate chaetae simple; maximum of three to six subacicular hooks on chaetigers 15–30............................................................................. R. (Rhamphobrachium)
3. (1) Bidentate distally recurved spiny hooks (Figs 2 A, 3A–C); two subacicular hooks per parapodium from chaetiger 5..................................................................................... R. (Minibrachium) nutrix n. sp.
- Unidentate distally recurved spiny hooks (Figs 2 B, 6G–J); 4–10 subacicular hooks per parapodium from chaetiger 3....... 4
4. (3) Subacicular hooks of chaetiger 3 simple (Fig. 6 D, F); pectinate chaetae with 9–13 very long teeth (Fig. 6 K).................................................................................................... R. (M.) talboti n. sp.
- Subacicular hooks of chaetiger 3 compound to pseudocompound (Figs 2 D, E, 5C); pectinate chaetae with 8–10 long teeth (Fig. 5 G)................................................................................. R. (M.) fractum n. sp.