Protoariciella Hartmann-Schroder 1962
- Dataset
- Review of Orbiniidae (Annelida, Sedentaria) from Australia
- Rank
- GENUS
Classification
- kingdom
- Animalia
- phylum
- Annelida
- class
- Polychaeta
- family
- Orbiniidae
- genus
- Protoariciella
description
Description. Specimen complete; body length about 2.5 mm, 45 chaetigers, width 270 µm (Fig. 29 A). Transition from thorax to abdomen indistinct (Fig. 29 A). Prostomium short, round; two peristomial segments (Fig. 29 B, C). Branchiae starting from chaetiger 14, first triange-cirriform, then oval; shorter than notopodia (Fig. 29 B, E). Notopodial postchaetal lobes digitiform; neuropodial lobes similar, but shorter; both lobes becoming shorter in abdomen (Fig. 29 B – E). Pygidium with four short cirri (Fig. 29 F). Notochaetae crenulated capillaries in all segments; forked chaetae absent (Fig. 29 C – E). Neurochaetae crenulated capillaries in thorax, capillaries and one curved serrated hook in abdomen (Fig. 29 C – E, G – J).
description
Figure 29
discussion
Remarks. This specimen is similar to Protoariciella (?) sp. A owing to chaetal shape and arrangement, while it differs owing to shorter thicker body and well developed neuropodial lobes. The specimen studied here likely represents a new species; but due to the few poorly preserved specimens and the limited knowledge of the important taxonomic characters in this genus, it is not described as a new species.
materials_examined
Material examined. Western Australia: Fremantle, Arthur Head, off end of South Mole, 32 ° 03 ’ S, 115 ° 44 ’ E, depth 6 m, 25.12.1983, coll. J. K. Lowry, AM W. 43258, 1 specimen on SEM stub.