Lindaspio polybranchiata, Sui & Dong & Wu & Li, 2023
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publication ID |
https://dx.doi.org/10.3897/zookeys.1153.101406 |
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publication LSID |
lsid:zoobank.org:pub:3CA5E635-BECD-40AA-80B3-A36E0F3E819 |
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persistent identifier |
https://treatment.plazi.org/id/601C3193-EE40-4088-9029-2CB1BDDC8641 |
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taxon LSID |
lsid:zoobank.org:act:601C3193-EE40-4088-9029-2CB1BDDC8641 |
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treatment provided by |
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scientific name |
Lindaspio polybranchiata |
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sp. nov. |
Lindaspio polybranchiata sp. nov.
Figs 2 View Figure 2 , 3 View Figure 3 , 4 View Figure 4
Material examined.
Holotype: Complete, Lingshui cold seep cruise, Faxian Dive 252, 1758 m, 17°37'N, 111°03'E, coll. crew of R/V Kexue, 28 May 2021, MBM 304666. Paratypes: 4 specimens, complete, same collection data as holotype, MBM 304662-MBM 304665 .
Non-type: 14 incomplete specimens depositing in one specimen bottle, MBM304661.
Description of holotype.
Total length 55 mm, maximum width 4 mm, including chaetae. More than 350 crowded chaetigers. Color pale in alcohol.
Prostomium anteriorly bilobed, forming two broadly swollen lobes (Fig. 2A View Figure 2 ), continuing posteriorly as narrow, undulating caruncle to anterior margin of chaetiger 2 (Fig. 2B View Figure 2 ). Palps short, thick, tapering to pointed tip, not extending beyond chaetiger 3 (Figs 2A View Figure 2 , 3A View Figure 3 ). Chaetiger 1 reduced, notopodia reduced to flattened lamella, lacking notochaetae (Fig. 3A View Figure 3 ); neuropodia with well-developed pre- and postchaetal lamellae (Fig. 3F View Figure 3 ) and fascicles of capillaries. Notopodia of chaetigers 2-4 shifted dorsally to medial position, with pre- and postchaetal lamellae forming three rows enclosing cluster of modified spines (Figs 2C, D View Figure 2 , 3A, F View Figure 3 ). Notopodia of chaetigers 5-8 gradually shifted to lateral position (Fig. 3A, F View Figure 3 ). Notopodia from chaetiger 5 and neuropodia from chaetiger 2 with well-developed pre- and postchaetal lobes.
Dorsal branchiae fingerlike, appear from chaetiger 2 (Fig. 3A View Figure 3 ) and remaining short to chaetiger 30, thereafter branchiae becoming thinner, longer, extending to dorsal midline. Ventral branchiae absent in the anterior part (Fig. 3G View Figure 3 ). From chaetiger 20 small neuropodial expansion (Fig. 3B View Figure 3 ), becoming well-developed neuropodial branchiae (Fig. 3C View Figure 3 ) at chaetiger 40, until about chaetiger 80, becoming longer, more cylindrical, nearly reaching ventral midline, but never as long as dorsal branchiae (Figs 3H, I View Figure 3 , 4A View Figure 4 ).
Notochaetae of chaetigers 2-4 modified into cluster of about 15 heavy spines (Figs 2C View Figure 2 , 3A View Figure 3 ); subsequent notochaetae numerous, thin capillaries (Fig. 4B View Figure 4 ) until about chaetiger 60 where hooded hooks appear; capillaries become heavier and more limbate in far posterior segments; individual notopodial hooks strongly curved, with pointed tips without minute teeth (Fig. 4C View Figure 4 ).
Anterior neurochaetae include row of heavy spines and ventral bundle of thin capillaries (Fig. 4D View Figure 4 ); neuropodial spines each with smooth shaft that tapers gradually, then continues as fine, pointed tip with fine bristles sometimes visible along edge (Fig. 4E View Figure 4 ); spines present until about chaetiger 40, then accompanied with thin capillaries; these capillaries accompanied by neuropodial hooded hooks from about chaetiger 65; each hook smaller, more delicate than notopodial hooks, without minute teeth (Fig. 4F View Figure 4 ). Pygidium simple, conical, lacking cirri (Fig. 3D, E View Figure 3 ).
GenBank Accession Number: COI OQ582086, 16S OQ592054, 18S OQ592055.
Remarks.
As mentioned above, three species have been reported in the genus Lindaspio . The new species is easily distinguished from L. dibranchiata and L. sebastiena in having a narrow, undulating caruncle, while L. sebastiena has no caruncle and L. dibranchiata has a short, mounded caruncle. The new species resembles L. southwardorum in having similar caruncle, ventral branchiae and dorsal clusters of spines in anterior notopodia, while the latter differs in having first neuro- branchiae from chaetiger 55 (vs. chaetiger 20 in the new species) and having more modified spines on chaetigers 2-4 (20 vs. 15).
The BLAST percent identity of the 18S sequence between the new species and Lindaspio dibranchiata is 99% (1758/1762 bp), suggesting that they are congeneric. Additionally, the COI and 16S sequences of our specimen are identical to those of Lindaspio sp. (GenBank accession number OK032597.1), which confirms that the unverified species of Lindaspio in GenBank is a Lindaspio polybranchiata sp. nov.
Etymology.
The species is so named because it has more neuropodial branchiae than the congeners.
Distribution.
Currently only known from the type locality, near Hainan Island, China, at a depth of 1758 m (Fig. 1 View Figure 1 ).
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.