Phylo novazealandiae Day, 1977

Zhadan, Anna, 2020, Review of Orbiniidae (Annelida, Sedentaria) from Australia, Zootaxa 4860 (4), pp. 451-502 : 490

Phylo novazealandiae Day, 1977

Figure 24

Phylo novazealandiae Day, 1977: 235–237 , fig. 3f–j.

Material examined. New Zealand: Pauatahanui , 41°S, 174°E, May 1960, coll. I. Estcourt, AM W.7447, 3 specimens, paratypes .

Type locality. Tasman Bay , New Zealand .

Description. All specimens studied incomplete. Thoracic width 2, 2.4, and 2.8 mm. Prostomium bluntly conical ( Fig. 24 C–E). Thoracic chaetigers numbering 15 ( Fig. 24A, C, D, E ). Branchiae from chaetiger 5, wide triangular, foliaceous, in abdomen becoming long triangular with widened base and tapering tips, longer than notopodia ( Fig. 24C, E, J, K ). Thoracic notopodial postchaetal lobes developed from first chaetiger, from digitiform to foliaceous, in abdomen becoming elongate, in anterior part, foliaceous with wide base, in posterior narrow digitate ( Fig. 24A, C, E, I, J ). Thoracic postchaetal neuropodial lobes as ridges with up to 9 papillae, upper papillae larger than lower ( Fig. 24B, D, E, G ). Subpodal papillae present on last thoracic and first two abdominal chaetigers, few stomach papillae only in first two abdominal chaetigers ( Fig. 24A, B, D, E ). Abdominal neuropodia bilobed with subequal short lobes; subpodal flange developed, with papilla (ventral cirrus). Interramal cirrus small, shorter than neuropodia ( Fig. 24B, E, F, J ). Notopodial chaetae crenulate capillaries, in abdominal notopodia also forked chaetae present ( Fig. 24J ). Thoracic neuropodia bearing 2–3 rows of thin curved serrated uncini and posterior row of capillaries; posterior thoracic chaetigers bearing very thick brown straight spines, upper one longer than others ( Fig. 24B, D, E , G–I). Abdominal neurochaetae thin capillaries; both rami supported by thin straight aciculae in abdomen. Distribution. New Zealand. Habitat. Subtidal. Remarks. The specimens studied here are in agreement with the description by Day (1977).

Figures

FIGURE 24. Phylo novazealandiae, AM W.7447, paratype.A–F: stereomicroscope, methylene blue staining; G–K: compound microscope. A. General lateral view; B. Thorax-abdomen transition, lateral view; C. Anterior end, dorsal view; D. Anterior end, lateral view; E. Anterior end, dorso-lateral view; F. Abdomen, lateral view; G. Parapodium of chaetiger 3; H. Neurochaetae of chaetiger 3; I. parapodium of chaetiger 14; J. Parapodium of posterior chaetiger; K. Branchia of posterior parapodium. a, acicula; br, branchia; cc, crenulated capillaries; fc, forked chaeta; ic, interramal cirrus; ne, neuropodium; no, notopodium; s, spines; u, uncini.