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Voucher specimen incomplete, 34 chaetigers long, small threadlike, 650µm wide at first chaetiger. Colour in alcohol pale, white. General appearance slightly inflated and dorso-ventrally flattened from chaetiger 2-9, 'bristly' appearance.

Prostomium bottle-shaped, broadly rounded frontal margin, sometimes anvil-shaped. Eyes absent. Caruncle to anterior margin of chaetiger 2. Peristomium narrow.

Branchiae three pairs, on chaetigers 2-4. First pair of branchiae narrow, digiform, clear with 'bubbly' look, slightly shorter or equal to length of dorsal lamellae of chaetiger 3, arising proximal to the dorsal mid-line. Second pair of branchiae digiform, tapering, half length or less than first branchial pair, arising posterior to the dorsal lamellae. Third pair of branchiae, short, strap-like, equal to in length or shorter than second branchial pair. All branchiae apinnate.

Dorsal lamellae of chaetiger 1 reduced, or absent, on chaetiger 2 becoming foliose, maximal in size on chaetiger 3, thereafter becoming smaller and progressively more sub-triangular. After chaetiger 9, lamellae are low ridges. Ventral lamellae fan shaped, becoming reduced in posterior segments. Small, pre-chaetal lamellae present in chaetigers 6-13, visible as a papilla-like bulge.

Notochaetae simple capillaries, in densely packed fascicles from chaetigers 2-10. Neurochaetae in two rows, simple capillaries only in anterior region, in densely packed fasicles from chaetigers 3-12. Neuropodial hooded hooks from chaetiger 17-18. Hooks multi-dentate with 2-3 small fangs above the main tooth.

Branchiae a/p, from setiger: present, 4 pairs, from setiger 2

Arrangement and shape of branchiae: 1^st and 4^th pair long, cylindrical, smooth to slightly wrinkled but without pinnules, 1^st pair longer, ratio: 2:1, 2^nd and 3^rd pair short, fleshy sub-triangular-like

Prostomium shape:  rectangular, anteriorly slightly rounded, peristomium collar-like, not forming lateral wings

Antenna a/p: absent, distinct caruncle reaches past the posterior of 1^st segment

Dorsal crest:  postsetal lamellae from setiger 6 extending dorsally, margin with opposite lamella and forming low dorsal crest, which gets larger in subsequent segments

Saber chaetae from setiger no.: 19, single or 2, curved, stout but less than in P. sp. A (HERMES), distal end (from half-way up granulated

Neuropodial hooks from setiger no. : 20

Shape of postsetal neuropodial lamellae:  rectangular,

Type of neuropodial hooks:  multidentate with 4 teeth above the main one, with inflated hood, secondary hood present, about 10 per fascicle

Overall appearance:  all specimens very thin, threadlike, uniform in width throughout

Branchiae a/p:  1 pair on 3^rd setiger,  tiny, attached to dorsal lobe

Prostomium shape: anteriorly rounded, longer than wide, caruncle reaching to the posterior of first segment, peristomium  forming collar without lateral wings

Saber chaetae from setiger no.: 10, stout, strongly curved, single chaetae, with obvious hood, no granulation

Neuropodial hooks from setiger no. : 11-12

Type of neuropodial hooks: multidentate, about 4 teeth?, squarish  primary hood, secondary hood present but nor very distinct