Branchinotogluma kaireiensis, 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.13220042 |
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persistent identifier |
https://treatment.plazi.org/id/9C126744-BA6A-FFF0-FC12-90C7DBCCC4EE |
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treatment provided by |
Plazi |
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scientific name |
Branchinotogluma kaireiensis |
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sp. nov. |
Branchinotogluma kaireiensis View in CoL sp.nov.
( Fig. 4 View Figure 4 )
ZooBank registration: urn:lsid:zoobank.org:act:3481E7B6-372B-44B0-967A-5023DF37F339 .
Branchinotogluma sp. CIR— Zhou et al. 2022.
Diagnosis: Large-sized (about 38 mm in maximum) Branchinotogluma with 10 pairs of elytra and arborescent branchiae on segments 3–21. Seven pairs of short, ventral papillae on segments 11–17 on female; four pairs of well-developed ventral papillae present on segments 12–15, and two pairs of ventral lamellae on segments 16 and 17 on male. Notopodia without bracts. Pharynx with three dorsal and two ventral papillae and a pair of rounded lateral papillae surrounding the opening.
Type locality: Kairei vent field, CIR.
Type material: Holotype (NSMT-Pol_P-921): female, 38.22 mm in length, 20.72 mm in width, Kairei vent field (25.32°S, 70.04°E, 2434 m deep), CIR, Dive 1450, 14 February 2016. Paratype 1 (NSMT-Pol_P-922): female, 8.63 mm in length, 4.02 mm in width, same collecting data as holotype. Paratype 2 (NSMTPol_P-923): male, 12.25 mm in length, 13.93 mm in width, same collecting data as holotype. Paratype 3, ( RSIO72112 ): Wocan vent field (6.36°N, 60.53°E, 2970 m deep), Dive 211, 30 May 2022 GoogleMaps .
Description: Body short, 21 segments, spindle-shaped, slightly tapered anteriorly and posteriorly, flattened ventrally, and arched dorsally ( Fig. 4A, B View Figure 4 ). Elytra 10 pairs, on segments 2, 4, 5, 7, 9, 11, 13, 15, 17, and 19, large, imbricated, rounded, or subreniform, iridescent when fresh and pale white in ethanol ( Fig. 4C View Figure 4 ); elytrophores long, cylindrical ( Fig. 4D View Figure 4 ). Branchiae arborescent, with very short, terminal filaments ( Fig. 4D View Figure 4 ), present on segments 3–21, larger on middle segments than on anterior and posterior ones; branchiae separated into two clusters, with one attached to the lateral side of dorsal tubercles or elytrophore ( Fig. 4D, L View Figure 4 ) and the other at the bases of notopodia ( Fig. 4D, M View Figure 4 ), which may be absent from the last two segments ( Fig. 4H View Figure 4 ).
Prostomium deeply bilobed, anterior lobes subtriangular with frontal filaments ( Fig. 4E View Figure 4 ). Middle antenna inserted in anterior notch, with cylindrical ceratophore extending to tips of anterior lobes of prostomium; style long, surpassing prostomium. Eyes absent ( Fig. 4E View Figure 4 ). Pair of smooth, stout, long, and tapering palps attached to lateral sides of prostomium ( Fig. 4E, F View Figure 4 ). First achaetous segment fused to prostomium, not distinct dorsally ( Fig. 4F View Figure 4 ); two pairs of the tentacular cirri shorter and more slender than palps ( Fig. 4F View Figure 4 ). Segment 2 without bract, bearing the first pair of elytra; ventral cirri longer than following ones ( Fig. 4E, F View Figure 4 ). Mouth ventrally located between segments 1 and 2 ( Fig. 4F View Figure 4 ). Pharynx, when everted, with a pair of rounded papillae at the lateral sides, three dorsal and two ventral papillae surrounding the opening; two pairs of jaws each with c. 30 teeth on the inner border ( Fig. 4G View Figure 4 ).
Parapodia biramous, with notopodia usually shorter than neuropodia, except on segment 2 ( Fig. 4K–N View Figure 4 ). Notopodia with elongate acicular lobes on lower side ( Fig. 4H, I, K–M View Figure 4 ), lacking in bracts; neuropodia well developed, with elongate triangular prechaetal lobe and shorter, rounded postchaetal lobe ( Fig. 4L, M View Figure 4 ). Dorsal cirri long, filamentous, with long, cylindrical cirrophores, attached basally to the dorsal side of notopodia on non-elytrigerous segments ( Fig. 4N View Figure 4 ). Ventral cirri shorter than dorsal cirri, with tapered ends ( Fig. 4I, M View Figure 4 ).
Notochaetae stout, straight, in radiating bundles ( Fig. 4L, M View Figure 4 ), with two rows of minute spines in distal two-thirds part ( Fig. 4O View Figure 4 ). Neurochaetae in fan-shaped bundles, numerous, slender ( Fig. 4L, M View Figure 4 ). Supraacicular neurochaetae straight with hooked tips and two rows of prominent spines ( Fig. 4P View Figure 4 ). Subacicular neurochaetae long, more numerous than supraacicular neurochaetae, with two rows of feather-like serrations ( Fig. 4Q View Figure 4 ).
Ventral papillae seven pairs, short, present on segments 11–17 ( Fig. 4B View Figure 4 ). Pygidium with a pair of long and slender anal cirri ( Fig. 4I View Figure 4 ).
On male, branchiae present on segments 3–16. Ventral papillae four pairs, present on segments 12–15, well-developed, with tapered ends ( Fig. 4J View Figure 4 ); ventral lamellae two pairs, present on segments 16 and 17. Segment 19 modified with much smaller elytrophores and smaller elytra; notochaetae similar to that on previous ones; neurochaetae numerous with two rows of widely-spaced, long spines beginning subdistally and extending to tips. Segments 20 and 21 fused ventrally, strongly modified ( Fig. 4I View Figure 4 ); notopodial acicular lobes fused to long cirrophores of dorsal cirri, with a few notochaetae ( Fig. 4N View Figure 4 ); neuropodia with elongated post-acicular lobes, ventral cirri long, extending to the end of neuropodia ( Fig. 4N View Figure 4 ); neurochaetae long and slender, with two rows of prominent spines beginning subdistally on both sides and extending to tips ( Fig. 4R View Figure 4 ).
Etymology: The species is named after the type locality, Kairei vent field, CIR.
Distribution: The species is currently known from Kairei vent field, CIR and Wocan vent field, CR.
Remarks: Branchinotogluma kaireiensis sp. nov. can be distinguished from most congeners by having seven pairs of short, rounded, ventral papillae on females. On this basis, Branchinotogluma kaireiensis sp. nov. is most similar to B. burkensis Pettiboneae, 1989 and B. pettiboneae Wu et al., 2019 , both with seven pairs short ventral papillae on females. The new species can be distinguished from B. burkensis and B. pettiboneae by lacking notopodial bracts in all segments.
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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