Cirriformia okudai, Jimi & Fujiwara & Kajihara, 2024
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publication ID |
https://doi.org/10.12782/specdiv.29.281 |
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persistent identifier |
https://treatment.plazi.org/id/03F55461-1E29-FFB5-9DD9-D6FEEDB8F8B1 |
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treatment provided by |
Felipe |
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scientific name |
Cirriformia okudai |
| status |
sp. nov. |
Cirriformia okudai sp. nov.
[New Japanese name: Iso-mizuhiki] ( Figs 28–30 View Fig )
Material examined. Gangaraana: one of unknown sex, body length 64 mm, body width 3 mm, 281 chaetigers, 8 June 2014, coll. N. Jimi . Paratype (NSMT-Pol P-957), COI INSD accession no . PP891561.
Hime : one of unknown sex, body length 133 mm, body width 5 mm, 385 chaetigers, 5 June 2014, coll . N . Jimi . Paratype (NSMT-Pol P-958), COI INSD accession no . PP891564.
Isotake: one of unknown sex, body length 92 mm, body width 4 mm, 315 chaetigers, 19 June 2014, coll . N . Jimi . Paratype (NSMT-Pol P-959), COI INSD accession no . PP891572.
Izumozaki: one of unknown sex, body length 149 mm, body width 4 mm, 413 chaetigers, 7 June 2014, coll. N. Jimi. Holotype (NSMT-Pol H-960), COI INSD accession no. PP891577.
Koinoura: three of unknown sex, body length 66– 101 mm, body width 3 mm, 232–340 chaetigers, 26 June 2014, coll . N . Jimi . Paratypes (NSMT-Pol P-961), COI INSD accession no . PP891579.
Kochi-rinkai-ura: two of unknown sex, body length 101 mm, body width 3 mm, 332–372 chaetigers, 18 June 2014, coll . N . Jimi . Paratypes (NSMT-Pol P-962), COI INSD accession no . PP891581.
Motoshima: two of unknown sex, body length 12–35 mm, body width 1 mm, 168–201 chaetigers, 28 June 2014, coll . N . Jimi . Paratypes (NSMT-Pol P-963), COI INSD accession no . PP891590.
Nagamatsu: one of unknown sex, body length 136 mm, body width 6 mm, 464 chaetigers, 1 July 2014, coll . N . Jimi . Paratype (NSMT-Pol P-964), COI INSD accession no . PP891592.
Nitinan: one of unknown sex, body length 180 mm, body width 3 mm, 429 chaetigers, 24 June 2014, coll . N . Jimi . Paratype (NSMT-Pol P-965), COI INSD accession no . PP891593.
Description. Body length 12–180 mm and width 1–6 mm, 168–464 chaetigers, and color in life orange. Color in alcohol pale yellow ( Fig. 28A View Fig ). Several specimens with black pigmentation in anterior ventral zone. Body elongated, dorsally inflated and grooved throughout, ventral surface not grooved. Eyes absent. Prostomium broad triangular ( Fig. 29). Paired nuchal organs located on prostomium. Peristomium with one annulation and some wrinkles, deeply grooved in junction between peristomium and chaetiger 1. Branchiae start from peristomium, one pair per segment. Branchiae arising from notopodial ridge, in posterior segments, inserted at discrete distance from notopodial ridge, not shifting to mid-dorsal section. Notopodia and neuropodia separated, forming shoulders shifting from a position closer to dorsum to a more median position along midbody. Two groups of dorsal tentacles arising from chaetigers 6–7 (<50 mm length) or 8–9 (> 50 mm length); each group with 9–49 tentacles. Dorsal tentacles organized in two groups each. Notopodia and neuropodia with capillary chaetae and spines. Notochaeta: 10–21 capillary chaetae per fascicle along entire body, 3–8 spines ( Fig. 30A View Fig ) present from chaetigers 35–79 and following chaetigers, spines short, slightly curved,tip rounded. Neurochaeta: 10–14 capillary chaetae per fascicle along entire body, 3–6 spines ( Fig. 30B View Fig ) present from chaetigers 17–69 and following chaetigers, spines short, slightly curved, tip rounded. Pygidium simple, with terminal anus.
Methyl Green Staining Pattern. The top of prostomium and edge of dorsal area of chaetiger 4–7 were notably stained. Segment after tentacles were stained forming complete rings around segments, inter-segmental grooves not staining ( Fig. 28B, C View Fig ).
Etymology. This species is named after Dr. Shiro Okuda in recognition of his great taxonomic works about Japanese polychaetes.
Distribution and habitat. Known from shallow water area of rocky beach (~ 3 m) around Japan.
Remarks. This species resembles C. posterotentaculata sp. nov. in dorsal tentacles arising from chaetigers 8–9. This species can be discriminated from C. posterotentaculata by methyl green staining pattern of prostomium and dorsal area of chaetigers 4–7. No other species of Cirriformia have dorsal tentacles arising from chaetigers 8–9.
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