Cirriformia posterotentaculata, Jimi & Fujiwara & Kajihara, 2024
|
publication ID |
https://doi.org/10.12782/specdiv.29.281 |
|
persistent identifier |
https://treatment.plazi.org/id/03F55461-1E2D-FFBB-9F06-D5DBED83F8D3 |
|
treatment provided by |
Felipe |
|
scientific name |
Cirriformia posterotentaculata |
| status |
sp. nov. |
Cirriformia posterotentaculata sp. nov.
[New Japanese name: Ushiro-mizuhiki]
( Figs 31–33 View Fig View Fig View Fig )
Material examined. Asamushi: six of unknown sex, body length 39–90 mm, body width 1–5 mm, 282–341 chaetigers, 10 June 2014, coll. N. Jimi . Holotype (NSMTPol H-966), COI INSD accession no PP891559, Paratypes (NSMT-Pol P-967) .
Description. Body length 39–90 mm and width 1–5 mm, 282–341 chaetigers, and color in life orange. Color in alcohol pale yellow ( Fig. 31A View Fig ). Several specimens with black pigmentation in anterior ventral zone. Body elongat- ed, dorsally inflated and grooved throughout, ventral surface not grooved. Eyes absent. Prostomium broad triangular ( Fig. 32 View Fig ). 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 well 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 7–8 (<5.9 mm length) or 8–9 (> 5.9 mm length); each group with 23–44 tentacles. Dorsal tentacles organized in two groups each. Notopodia and neuropodia with capillary chaetae and spines. Notochaeta: 2–9 capillary chaetae per fascicle along entire body, 3–4 spines ( Fig. 33A View Fig ) present from chaetigers 49–70 and following chaetigers, spines short, slightly curved, blunt. Neurochaeta: 2–11 capillary chaetae per fascicle along entire body, 3–4 spines ( Fig. 33B View Fig ) present from chaetigers 29–50 and following chaetigers, spines short, slightly curved, blunt. Pygidium simple, with terminal anus.
Methyl Green Staining Pattern. The posterior margin of prostomium was notably stained. Segment after tentacles were stained forming complete rings around segments, inter-segmental grooves not staining ( Fig. 31B, C View Fig ).
Etymology. The specific name is a compound adjective (postero- + tentaculum + -atus) referring to the new species having tentacles on 7–8 or 8–9 chaetigers.
Distribution and habitat. Only known from shallow water area of rocky beach, Asamushi, Aomori Prefecture.
Remarks. See remarks of C. okudai .
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.