Levensteiniella longqiensis, Han & Zhou & Chen & Wang, 2024
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publication ID |
https://doi.org/ 10.1093/zoolinnean/zlad140 |
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publication LSID |
lsid:zoobank.org:pub:F6E6171-16B7-43DA-A064-6D13AFD99FC1 |
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DOI |
https://doi.org/10.5281/zenodo.13313310 |
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persistent identifier |
https://treatment.plazi.org/id/9C126744-BA6B-FFF2-FC17-9596DD98C198 |
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treatment provided by |
Plazi |
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scientific name |
Levensteiniella longqiensis |
| status |
sp. nov. |
Levensteiniella longqiensis View in CoL sp.nov.
( Fig. 3 View Figure 3 )
ZooBank registration: urn:lsid:zoobank.org:act:DDF94337-2990-4CF4-A28A-21F1D2CB2BEE .
Polynoidae sp. 2— Zhou et al. 2018b.
Diagnosis: Small-sized Levensteiniella with oval prostomium. Two pairs of short, ventral papillae present on segments 11 and 12 for some individuals. Notochaetae with one row of pocketlike spines, which then separate into two rows.
Type locality: Longqi vent field, SWIR .
Type material: Holytype ( RSIO35287 ): incomplete in the posterior part, Longqi vent field (37.78°S, 49.65°E, 2760 m deep), SWIR, Dive 94, 11 January 2015. Paratype ( RSIO35289 ): incomplete, GoogleMaps same for holotype. All specimens were fixed and stored in 95–100% (v/v) ethanol GoogleMaps .
Description: Anterior 14 segments remaining on holotype ( Fig. 3A, B View Figure 3 ) and paratype, elytra lost ( Fig. 3A View Figure 3 ), seven pairs of prominent elytrophores on dorsal segments 2, 4, 5, 7, 9, 11, and 13 on holotype ( Fig. 3A View Figure 3 ). Chaetae often coated with polymetallic sulphides ( Fig. 3A, B View Figure 3 ).
Prostomium oval, deeply bilobed ( Fig. 3C, D View Figure 3 ), anterior lobes subtriangular with tapering lateral antennae ( Fig. 3C View Figure 3 ). Median antenna inserted into anterior notch, with short, cylindrical ceratophore and subulate style bearing a long filament ( Fig. 3C, D View Figure 3 ). Palps stout, tapering slightly with long, terminal filaments ( Fig. 3C, D View Figure 3 ). First segment achaetous, fused to prostomium, not visible dorsally; two pairs of tentacular cirri long, slender, and tapering with short, cylindrical tentaculophores ( Fig. 3C, D View Figure 3 ). Segment 2 with biramous parapodia bearing the first pair of elytrophores ( Fig. 3C View Figure 3 ); ventral cirri attached basally to neuropodia, tapering, with long filaments and much longer than the following ventral cirri ( Fig. 3D View Figure 3 ). Mouth located between segments 1 and 2 ventrally ( Fig. 3D View Figure 3 ).
Parapodia biramous, notopodium short with notochaetae ( Fig. 3E, F View Figure 3 ); neuropodium with projecting acicular lobe ( Fig. 3F View Figure 3 ). Notochaetae are usually covered in sulphide minerals and shorter than neurochaetae ( Fig. 3E, F View Figure 3 ), with one row of pocketlike spines distributed in distal part and separated into two groups of prominent, sharp spines close to the tips ( Fig. 3G View Figure 3 ). Neurochaetae numerous ( Fig. 3E, F View Figure 3 ), with two rows of pointed spines tapering toward tips ( Fig. 3H View Figure 3 ). Dorsal cirri with long, cylindrical cirrophores and extending to the tips of notochaetae on segments 6, 8, and 13 ( Fig. 3A View Figure 3 ).
Two pairs of short (shorter than length of one segment), cylindrical, ventral papillae present on segments 11 and 12 in holotype ( Fig. 3B View Figure 3 ), but absent from the paratype.
Etymology: The species is named after the type locality, Longqi vent field.
Distribution: The species is currently only found in Longqi vent field.
Remarks: It is not easy to distinguish Levensteiniella longqiensis sp. nov. from other described Levensteiniella species from incomplete specimens. However, two pairs of short (shorter than one segment), cylindrical, ventral papillae in the holotype of Levensteiniella longqiensis sp.nov. are distinct from both males and females of other congeners. Females in this genus have no ventral papillae, while males usually possess either two pairs (as in Levensteiniella kincaidi , Levensteiniella manusensis , Levensteiniella plicata , Levensteiniella pettiboneae sp. nov., Levensteiniella raisae Pettibone, 1989 , and Levensteiniella undomarginata Zhang et al., 2018 ) or only one pair (as in Levensteiniella iris Hourdez and Desbruyères, 2003 and Levensteiniella intermedia Pettibone, 1990 ) of long (approximately as long as three segments), ventral papillae ( Pettibone 1985a, 1989, 1990, Hourdez and Desbruyères 2000, 2003, Wu and Xu 2018, Zhang et al. 2018b). However, additional intact specimens of Levensteiniella longqiensis sp. nov. are still needed to perform a more comprehensive comparison with its congeners. In addition, molecular DNA barcode analysis strongly supports Levensteiniella longqiensis sp. nov. to be a new species, indicating the importance of a molecular approach in separating deep-sea cryptic species ( Borda et al. 2013).
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.
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