Dysponetus bulbosus Hartmann-Schroder 1982

• Main Authors: Darbyshire, Teresa, Brewin, Paul E.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2015
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Phyllodocida; Chrysopetalidae; Dysponetus; Dysponetus bulbosus; Hallett; Anvers; Bonaparte; Anvers Island; Arthur Harbor; Bonaparte Point; Eagle Bay; Antarc*; Antarctica; antarcticus
• Online Access: https://zenodo.org/record/6112764; https://doi.org/10.5281/zenodo.6112764

Dysponetus bulbosus Hartmann-Schröder, 1982 Figure 1 A–F, 2 A–B Hartmann-Schröder, 1982: p 54, Figs 1–4.— Hartmann-Schröder 1986: p 32, Figs 1–5.— Pleijel et al. 2012: p 5. Material examined. Cape Naturaliste, Eagle Bay, Western Australia, fine algal bed with sand, holotype (ZMH P- 16752), 07.11.1975; Hallett Cove, Adelaide, south Australia, algae and encrustion in rockpools, 1 specimen (ZMH P- 18720), 13.12.1975; Port MacDonnell, Cape Northumberland, 2 km west of town, lee side of abrasion zone with volcanic rock, algal bed & turf, 1 specimen (ZMH P- 18764), 19.12.1975; Cowbowie Field Station, Yorke Peninsula, Gulf St Vincent, South Australia, Sta. 0 1 (35 °05′N, 137 ° 44 ′E), mixed sand & gravel, 3–5 m, 2 specimens (SMNH 83511), 28.02. 2004. Additional material examined. Dysponetus sp.: inlet by Bonaparte Point, Arthur Harbor, Anvers Island, Antarctica, Sta. 6-63 (64 ° 46 ′S, 064° 04′W), from fish trap crushed by small berg, 4 fathoms, 1 specimen (USNM 247268), 24.01. 1963. Morphological re-assessment. The detailed descriptions published by Hartmann-Schröder in each case are still essentially correct, the only amendments necessary being to the details of the first three segments together with some additional observations. The published descriptions for each specimen are slightly different to each other and, in fact, the description by Hartmann-Schröder 1993 is now known to be for a different species (see D. antarcticus n. sp.). However, re-examination, combined with details from larger, more recent specimens, shows that the 1982 and 1986 specimens all exhibit the same characteristics for the initial anterior segments as follows: Segment 1: The original descriptions of D. bulbosus detail this segment as having either dorsal but no ventral cirri (Holotype— 1982; 1993) or both dorsal and ventral cirri (1986). Additionally, either notochaetae but no neurochaetae were detailed (1982, 1993) or both cited as absent (1986). In all cases, even though appendages may have been lost, the cirrophores for the dorsal ...