A new species of Protocirrineris (Polychaeta: Cirratulidae) from Hawaii including a redescription of the New Zealand Protocirrineris nuchalis

Figures & data

Figure 1  Protocirrineris mascaratus sp. nov. A, anterior end, dorsal view; B, anterior end, lateral view; C, MGSP of anterior end showing mask formed by unstained areas of prostomium and peristomium. (tf, tentacular filaments; br, branchia).

Figure 2  SEM of Protocirrineris mascaratus sp. nov. A, anterior end, dorso-lateral view; B, anterior end, dorsal view; C, capillary fibrils, frontal view; D, capillary fibrils, lateral view. (tf, tentacular filaments; br, branchia; pr, prostomium; per, peristomium).

Table 1  Synoptic table of morphological characteristics of species currently assigned to Protocirrineris.

Species	Type locality	Prostomium	Peristomium	Origin of branchiae	Arrangement of tentacles	MGSP	References
chrysoderma (Claparède, 1868)	Gulf of Naples, Italy	Triangular, without eyes	?	Chaetiger 4	2 pairs above chaetigers 4 and 5	Unknown	Fauvel 1953
nuchalis (Ehlers, 1907)	Auckland harbour, New Zealand	Short, conical, with nuchal	3 annuli, first longer; dorsal crest	Chaetiger 4	2 groups of 2–4 longitudinal rows each above chaetigers 7–16	Body stained uniformly	Ehlers 1907
antarctica (Monro, 1930)	South Georgia, Antarctica	Short and bluntly conical, without eyes	2 indistinct annuli	Chaetiger 3	2 groups of 6–8 filaments above chaetiger 3, 4 and 5.	Unknown	Monro 1930
socialis Blake, 1996	Central California, USA	Short, rounded, without eyes	2 annuli, enlarged	Chaetigers 1–3	2 groups of 3 longitudinal rows each with 3 or 4 filaments above chaetigers 7–9	No staining reaction	Blake 1996
angelicollatio Elías & Rivero, 2009	Mar del Plata, Argentina	Short, rounded, with nuchal	2–3 annuli, dorsal crest	Chaetigers 7 or 8	2 groups of 2 longitudinal rows above chaetigers 4–7	Uniformly stained with a dark green	Elías & Rivero 2009
mascaratus sp. nov.	Oahu, Hawaii, USA	Short, conical, with nuchal	3 annuli, sub-equals	Chaetigers 3 or 4	2 groups of 2 pairs each above chaetigers 1–2 or 2–3	Prostomium and peristomium intensely speckled leaving a ‘mask’ unstained	Present study

Figure 3  Protocirrineris nuchalis. A, anterior end, dorsal view (syntype 1); B, anterior end, lateral view (syntype 1). (tf, tentacular filaments; br, branchia).

Figure 4  Protocirrineris nuchalis. A, anterior end, dorsal view; B, anterior end, dorso-lateral view showing prostomium and peristomium; C, insertion of tentacular filaments from chaetigers 7–16; D, mid-body in ventral view; E, posterior end with pygidium; F, MGSP of anterior end of syntype 2. (pr, prostomium; per, peristomium; nuO, nuchal organ; ch, chaetiger; br, branchia).

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