Loandalia fredrayorum, Marks, Shona & Hocknull, Scott, 2006

Marks, Shona & Hocknull, Scott, 2006, New species of Loandalia (Polychaeta: Pilargidae) from Queensland, Australia, Zootaxa 1119, pp. 59-68: 62-63

publication ID

http://doi.org/ 10.5281/zenodo.171680

publication LSID

lsid:zoobank.org:pub:DB1CEA92-5D73-43B7-A5C1-4BCF32B32451

persistent identifier

http://treatment.plazi.org/id/305287F5-FF80-FFD6-FED6-FA27FC587329

treatment provided by

Plazi

scientific name

Loandalia fredrayorum
status

sp. nov.

Loandalia fredrayorum  sp. nov.

Fig. 2View FIGURE 2, a –d.

Etymology:

For Frederick Marks and Raymond Fitzgerald.

Material:

Holotype. QMC G 223179, Loandalia fredrayorum  sp. nov. [Middle Banks Moreton Bay, S 27 ° 12 ’, E 153 ° 19 ’, collected July/ August 1982]. Paratype. QMC G 223180 [Middle Banks Moreton Bay, S 27 ° 12 ’, E 153 ° 19 ’, July/ August 1982]. Habitat is a submerged sandbank with a depth of 3– 11 m.

Diagnosis:

Singular palpostyles. Parapodia uniramous on chaetiger 1, thereafter biramous; notopodial spine emergent at chaetiger 9; notopodial chaetae numbering 2–4; neurochaetae numbering 20–24; ventral cirri from chaetiger 7; dorsally positioned anus with two lateral papillae­like anal cirri.

Description:

Pilargid of large size, length 181mm, width 1.85mm (without chaetae), 2.55 (with chaetae); 218 chaetigers. Body of preserved individuals creamy/white to reddish/brown.

Body corpulent; posterior segments slightly dorso­ventrally flattened. Chaetiger 1–6 inflated, with segmentation inconspicuous, surface areolated; lateral­grooves extend from first parapodia to pygidium ( Fig 2View FIGURE 2, a). Prostomium discrete; palpophores divided; palpostyles are singular and papillae­like. Pharynx eversible; eye spots absent. First parapodium uniramous with remaining chaetigers biramous; notopodial lobes present at chaetiger 2, fully developed by chaetiger 6; 2–4 notochaetae present from chaetiger 2; notopodial spines weakly emerging at chaetiger 9, fully emergent at chaetiger 46. Neuropodial lobe larger than notopodia, reduced in chaetiger 1–4; simple curved neurochaetae with numerous whorled teeth; Neurochaetae in 5–6 bundles of 4, totalling 20–24 neurochaetae per parapodia; emergent neuroacicula from chaetiger 1, positioned anterior to chaetae. Ventral cirri appears from chaetiger 7, fully developed on chaetiger 8– 9 ( Fig 2View FIGURE 2, b). Two most posterior segments possesses emergent notopodial spines and neuroacicula, chaetae are absent, with considerably reduced parapodia lobes. Pygidium as an anal plate, 2 lateral anal cirri present, papillae­like, mid ventral anal cirrus not visible; ventral surface of pygidium plate has ‘m’ like groove ( Fig 2View FIGURE 2, d); anus is positioned dorsally ( Fig 2View FIGURE 2, c).

Remarks:

Loandalia fredrayorum  differs from all other species of Loandalia  by possessing the highest neurochaetae count, 20–24. L. fredrayorum  differs from L. aberrans  , L. gracilis  , L. indica  and L. ocularis  by possessing uniramous parapodia only on chaetiger 1, rest biramous. Differs further from L. aberrans  by the absence of dorsal cirri. L. fredrayorum  differs from L. bennei  , L. evelinae  , L. riojai  and L. gladstonensis  sp. nov. by possessing singular palpostyles. Differing further from L. bennei  , L. evelinae  and L. gladstonensis  by possessing notopodial spines emergent at chaetiger 9. L. fredrayorum  differs from L. tricuspis  and L. vivianneae  by possessing ventral cirri starting at chaetiger 7 versus chaetiger 4; and notopodial spines starting at chaetiger 9 versus chaetiger 7. L. fredrayorum  differs from L. americana  , L. evelinae  and L. maculata  by possessing ventral cirri starting from chaetiger 7 versus chaetiger 6. Further differing from L. americana  by possessing an emergent notopodial spine from chaetiger 9 versus chaetiger 2. L. fredrayorum  differs further from L. fauveli  by possessing a notopodial spine at chaetiger 9 versus chaetiger 8. L. fredrayorum  differs further from L. maculata  by possessing a notopodial spine at chaetiger 9 versus chaetiger 6. L. fredrayorum  differs from L. salazarvallejoi  by possessing anal cirri that are papillae­like versus elongate (longer than pygidium). Distinguishing features summarised in table 1.