Aphelochaeta Blake, 1991
|
Prostomium |
Body shape |
DT/1st Br |
Pygidium |
MGSP |
|
|
Aphelochaeta sp1 |
Pointed, conical |
Cylindrical, dorsal thorax slightly domed |
DT on edge of peristomium, near mid line, 1stBr distal and on same level |
Not observed |
Dark band around base of prostomium; peristomium with dark bands on the second and third annulations, thin bands on thoracic chaetigers corresponding to edge of parapodia |
|
Aphelochaeta longisetosa (Hartmann-Schröder, 1965) |
Conical, blunt-pointed |
Body dorsally hump-backed, widening gradually in thorax region |
DT separated, situated laterally on distal edge of peristomium, dorsal and proximal to 1stBr |
Low lobes, ventral lobe large extending with an acute tip |
Band or spot on ventral prostomial region extending into mouth, distinct partial bands ventrally on edges of thoracic chaetigers, becoming more dense in mid and proximal thoracic chaetigers, some banding dorsally on thoracic chaetigers |
|
Aphelochaeta sp 5fB |
Wide, conical with rounded or ‘stumpy’ point |
Body dorsally flattened, widening gradually in thorax |
DT on proximal edge of peristomium, dorsal to and on the same level or slightly anterior to 1stBr; second branchial pair close to first pair |
Lobed, ventralmost lobe largest, blunt and extended |
Band ventral under the prostomium extending into the mouth, narrow bands along lateral and ventral edges of thoracic chaetigers |
|
Aphelochaeta sp 7 |
Conical bluntly pointed |
Inflated anteriorly, with dorsal groove in mid to posterior thoracic region |
DT on edge of peristomium with 1stBr lateral or slightly distal to DT |
Lobed, ventral lobe larger than others |
Band of stain at junction of prostomium and peristomium, another band on the distal peristomium |
|
DT = dorsal tentacles; 1stBr = first pair of branchiae; MGSP = methyl green staining pattern |
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References
Blake, J. A. (1991) Revision of some genera and species of Cirratulidae (Polychaeta) from the western north Atlantic. Ophelia Supplement, 17-30.
Blake, J. A. (1996) Family Cirratulidae Ryckholdt, 1851. Including a revision of the genera and species from the Eastern North Pacific. Taxonomic atlas of the benthic fauna of the Santa Maria Basin and the western Santa Barbara Channel. Volume 6 - the Annelida Part 3 - Polychaeta: Orbiniidae to Cossuridae., 263-384.
Doner, S. A. & Blake, J. A. (2009) Two new species of Aphelochaeta (Polychaeta: Cirratulidae) from deep water off northern California. Zoosymposia, 2, 127-137.
Elias, R. & Rivero, M. S. (2009) Two new species of Cirratulidae (Annelida: Polychaeta) from Mar del Plata, Argentina (SW Atlantic). Zoosymposia, 2, 139-148.
Elias, R. & Rivero, M. S. (2011) A new species of Cirratulidae (Polychaeta) with characteristics of three genera, and a key to the known species around Mar del Plata (south-western Atlantic). Journal of the Marine Biological Association of the United Kingdom, 91, 1529-1535.
