Phylo fimbriatus ( Moore, 1903 )

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

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Phylo fimbriatus ( Moore, 1903 )


Phylo fimbriatus ( Moore, 1903)

Figure 23 View FIGURE 23

Aricia fimbriata Moore, 1903: 464–467 , Pl. 24, figs 31–35;

Phylo fimbriatus: Hartman 1957: 267 ; Day 1977: 234–235, fig. 3a-e.

Material examined. Victoria: Westernport Bay , 38°22’S, 145°32’E, 20.11.1973, depth 13 m, coll. J. Kudenov, AM W.7444, 1 specimen GoogleMaps ; same locality, 26.11.1973, depth 10 m, coll. J. Kudenov, AM W.7445, 1 specimen GoogleMaps . Both specimens were previously examined by J. Day.

Type locality. Suruga Bay , Honshu Island, Japan .

Description. Both specimens studied incomplete, thoracic width 2.4 mm and 1.2 mm. Thorax flattened, consisting of 17 and 14 chaetigers correspondingly; abdomen cylindrical ( Fig. 23A, C, G View FIGURE 23 ). Prostomium conical, with sharply pointed tip ( Fig. 23A, C View FIGURE 23 ). Branchiae from chaetiger 5, triangular with tapering tips; in abdomen becoming long and triangular, longer than notopodia in anterior segments, shorter than notopodia in posterior segments ( Fig. 23A, D, G, H, I View FIGURE 23 ). Thoracic notopodial postchaetal lobes developed from first chaetiger, digitate, become branched in 2–7 lobes beginning from second (in smaller specimen from fourth) chaetiger; in anterior abdomen also branched, then becoming long digitate ( Fig. 23A, D, G, H, I View FIGURE 23 ). Thoracic postchaetal neuropodia lobes as ridges with 2–9 papillae; subpodal papillae present on 2 last thoracic and 2–3 first abdominal chaetigers, up to 5 papillae per segment ( Fig. 23B, C, E, F View FIGURE 23 ). Abdominal neuropodia bilobed with outer lobe longer then inner; subpodal flange well developed with long flange papillae (ventral cirri) ( Fig. 23D, G View FIGURE 23 , H–J). Interramal cirri well developed, longer than neuropodia ( Fig. 23H, I View FIGURE 23 ). Notopodial chaetae crenulate capillaries, in abdominal notopodia also forked chaetae present ( Fig. 23H, I, K View FIGURE 23 ). Thoracic neuropodia with 3–5 rows of curved smooth uncini and few thin capillaries in posterior row; five posterior thoracic neuropodia bearing thick dark spines in upper part of anterior row; in smaller specimen spines absent ( Fig. 23B, C, E, F View FIGURE 23 ). Abdominal neuropodia with capillary and flail chaetae ( Fig. 23L View FIGURE 23 ). Both notopodia and neuropodia in abdomen supported by thin straight aciculae ( Fig. 23 View FIGURE 23 H–J).

Distribution. North Japan, Australia, Victoria.

Habitat. Subtidal.

Remarks. Phylo fimbriatus was described from North Japan ( Moore, 1903) and later recorded from Victoria ( Day, 1977). This species is easily distinguishable from other Phylo species by the characteristic branched notopodial lobes. The specimens studied here are in agreement with previous descriptions but should be confirmed by molecular studies.


Australian Museum












Phylo fimbriatus ( Moore, 1903 )

Zhadan, Anna 2020

Phylo fimbriatus

Day, J. H. 1977: 234

Aricia fimbriata

Moore, J. P. 1903: 467