Laubieriopsis soyoae, Jimi & Fujimoto & Ogawa & Fujita & Shigenobu & Imura, 2020
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publication ID |
https://doi.org/ 10.11646/zootaxa.4878.2.11 |
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publication LSID |
lsid:zoobank.org:pub:62E87DCC-0220-48F9-BA13-9768FC8C5A1E |
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DOI |
https://doi.org/10.5281/zenodo.4425995 |
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persistent identifier |
https://treatment.plazi.org/id/9B73BC7E-FF91-454C-EBD3-FED5D5BAFBB5 |
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treatment provided by |
Plazi |
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scientific name |
Laubieriopsis soyoae |
| status |
sp. nov. |
Laubieriopsis soyoae View in CoL sp. nov. Jimi
(New Japanese name: Soyo-sube-imomushi-gokai)
( Figure 3 View FIGURE 3 )
Type material. Holotype (NSMT-Pol H-825): 13 mm long, 0.3 mm wide, and 50 paratypes (NSMT-Pol P-826): 10–15 mm long (n=50), 0.3 mm wide (n=50), 24 chaetigers (n=50); free living, sand sediment, off Mikura Island , Tokyo, Japan, by a beam trawl ( Fig. 1C, D View FIGURE 1 ), at a depth of 1114–1171 m, collected by NJ. One paratypes (ICHUM- 6161): fragmented, used for SEM observation.
Description. Holotype (NSMT-Pol H-825) body complete, 13 mm long, 0.3 mm wide, with 24 chaetigers, cylindrical, not swollen in middle region ( Fig. 3A, 3B View FIGURE 3 ). Living colour transparent ( Fig. 3A View FIGURE 3 ). Prostomium partially exposed, fused to peristomium ( Fig. 3C View FIGURE 3 ). Mouth opening ventral, T-shaped. Integument iridescent, smooth, not papillated. Genital papillae unpaired ( Fig. 4B View FIGURE 4 ), low oval projections, present on right side of posterior margin of chaetiger 8. Anterior segments without annulations.
Parapodia biramous, lateral, projected along chaetigers 1–3, inconspicuous in subsequent body region. Interramal papillae, non-pedunculate. All chaetae brownish.
Chaetigers 1–3 ( Fig. 3D View FIGURE 3 ), with chaetae directed anteriorly: notopodia and neuropodia with four curved acicular chaetae per bundle. In chaetiger 4 and following chaetigers ( Fig. 3E View FIGURE 3 ), chaetae directed laterally or posteriorly: notopodia and neuropodia with short acicular and long capillary chaetae. Acicular chaetae smooth, tips entire, without denticles in tips. Capillary chaetae smooth.
Pygidium without anal cirri and papillae ( Fig. 3F View FIGURE 3 ), withdrawn into posterior segment; chaetae shape same in median chaetigers; anus terminal.
Etymology. The species is named after the R/V Soyo -maru. The type specimens from off Mikura Island were collected by the gear present on the ship. The specific name is a noun in the genitive case.
Distribution. Only known from the type locality, off Mikura Island, Tokyo, Japan, at a depth of 1114–1171 m.
Remarks. Laubieriopsis soyoae sp. nov. can be distinguished from the other members of the genus by the following features: i) 24 chaetigers, ii) chaetigers 1–3 without annulations, and iii) acicular chaetae with tips entire, without denticles. This species most resembles L. arenicola ( Riser, 1987) by having acicular chaetae with tapered smooth tips and body with more than 21 chaetigers; however, annulations in chaetigers 1–3 are only present in L. arenicola ( Riser 1987; Salazar-Vallejo et al. 2019), and the body has 25 chaetigers. Laubieriopsis hartmanae has been known from Japan ( Levenstein 1970; Imajima 2009; Salazar-Vallejo et al. 2019). The new species can be discriminated from L. hartmanae by having 24 chaetigers, instead of only 16, and genital papillae on chaetiger 8, instead of being present between chaetigers 6–7.
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.