Pelagobia longicirrata Greeff, 1879

KOLBASOVA, G. D., SYOMIN, V. L., SEMPERE-VALVERDE, J., TEIXEIRA, M. A. L. & CARVALHO, S., 2025, Holopelagic Annelida from the Red Sea off the Central Saudi Arabian coast, Zootaxa 5632 (1), pp. 1-41 : 17-18

publication ID	https://doi.org/10.11646/zootaxa.5632.1.1
publication LSID	lsid:zoobank.org:pub:D930D2FF-45EA-494A-8837-293C590A9B1E
DOI	https://doi.org/10.5281/zenodo.15398834
persistent identifier	https://treatment.plazi.org/id/03BB8796-F840-6E65-FF23-EE53DBFB99D4
treatment provided by	Plazi
scientific name	Pelagobia longicirrata Greeff, 1879
status

Treatment

Pelagobia longicirrata Greeff, 1879 View in CoL

( Figs 1 View FIGURE 1 , 9 View FIGURE 9 )

Pelagobia longicirrata Greeff, 1879: 247 View in CoL , Pl. XIV, Figs. 23–25 [original description, Tenerife Bay, Canary Islands].– Viguier 1886: 377, Pl. XXI, Figs. 1–13 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 View FIGURE 8 View FIGURE 9 View FIGURE 10 View FIGURE 11 View FIGURE 12 View FIGURE 13 [description, Bay of Alger].– Reibisch 1895: 21, Pl. II, Figs. 1–9 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 View FIGURE 8 View FIGURE 9 [description, Gulfstream, East- and West-Greenland, Labrador and Florida curents, the Sargasso Sea, Bermudans].– Southern 1909: 2, Pl. I, Fig. 1 View FIGURE 1 [description, Irish Sea, Dublin Bay].– Bergström 1914, 186, Fig. 70 [brief description, North and Central Atlantic, Indian Ocean].– Fauvel 1916: 61, Pl. I, Figs. 6 View FIGURE 6 , 7 View FIGURE 7 [description, Central Atlantic].– Fauvel 1923: 192, Fig. 72 a–c [description, Central Atlantic].– Nolte 1938: 274, Figs. 217–223 [description, North Atlantic].– Støp-Bowitz 1948: 21 [brief description, North Atlantic].– Fauvel, 1953: 131, Fig. 63 a–d [description, Indian Ocean].– Ushakov 1955: 105, Fig. 11 View FIGURE 11 [description, North Pacific].–Dales 1955: 435 [brief description].–1957: 107, Figs. 11–13 View FIGURE 11 View FIGURE 12 View FIGURE 13 [brief description].– Tebble, 1960: 419. Fig. 22 [brief description, South Atlantic].– Ushakov 1972: 187–188, Pl. XXI, Fig. 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 [brief description, East Pacific].– Böggemann 2009: 338–340, Figs. 71–72 [description, Central Atlantic].– Sarda et al. 2009: 11–15, Fig. 6 View FIGURE 6 [description, Mediterranean].– Isaychev et al. 2013: Figs. 1–3 View FIGURE 1 View FIGURE 2 View FIGURE 3 [description of specimens from the Drake Passage and comparison with literature data], Isaychev 2015: Figs. 1–6 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 [morphological comparison of specimens from different parts of the world]; Rozbaczylo et al. 2020: 150–151, Fig. 4 View FIGURE 4 [brief description, North Pacific].

Pelagobia erinensis Nolte, 1938: 278 View in CoL , Figs. 224, 225 [original description, Atlantic Ocean, North-Equatorial, Guinea and South-Equatorial currents, Azores].

Material examined. Three specimens: ZMMU WS20993 View Materials (FA, Et), ZMMU WS20994 View Materials (FA), ZMMU WS20995 View Materials (FA, Et) .

Description (based on all our material). Body length 5 mm, 12 segments and also range of chaetigers in the material examined. Live worms transparent, with pale-yellow nuchal organs; intestine yellow. Proboscis muscular, with pair of small terminal jaws. Prostomium pentagonal-elongated, with terminal depression, as long as wide. Two pairs of thin filiform appendages (pair of antennae and pair of palps) reach half of prostomium length. Pair of red eyes with lenses, well visible both in live and preserved specimens. Pair of nuchal organs forming distinct conicalrounded lappets on lateral sides of head. Tentacular segment with fascicle of 3 or 4 minute compound chaetae and two pairs of large tentacular cirri of subequal length, reaching 3 rd segment. Acicular structures in tentacular cirri absent. Parapodia of 2 nd segment without dorsal cirri, parapodia of following segments with dorsal and ventral cirri. Dorsal cirri as long as podial lobes; ventral cirri slightly shorter. Each parapodium with tuft of 12 to 16 chaetae and one thick acicula; all chaetae compound spinigers, with long smooth heterogomph shaft and serrated blade. Additional chaetae mentioned by Tebble (1960) and Böggeman (2009) absent. Pygidium short, bifurcated.

Distribution. The type locality of P. longicirrata is the Tenerife Bay, Canarian Islands ( Greeff 1879). Later records of P. longicirrata include North, South, tropical and subtropical Atlantic, Mediterranean Sea, North Pacific, Indo-Pacific; South Indian Ocean; Central Red Sea (this study). We do not include here the numerous records of P. longicirrata from the Arctic and Antarctic waters because we believe that these may be Pelagobia viguieri Gravier 1911 ( Kolbasova et al. 2023).

Remarks. Pelagobia longicirrata from the Red Sea conforms well to the P. longicirrata specimens from the Central Atlantic both morphologically and according to the 18S marker ( Fig. 9 View FIGURE 9 ). They are notably small, and gametes were not found within the body cavity, but the original description of P. longicirrata also gave a body length of only 3 mm and 15 chaetigers ( Greeff 1879), while P. longicirrata specimens from the Azores and Ireland were reported to have 14–19 segments with a body length of 7–8 mm ( Støp-Bowitz 1948). Larger specimens from circumpolar regions with 25 chaetigers and the body length of 8–12 mm ( Ushakov 1972; Isaychev et al. 2013; Kolbasova et al. 2020, 2023) must be P. viguieri ( Gravier, 1911) .