Siboglinum cf. carpinei, Ivanov, 1970

Southward, Eve C., Andersen, Ann C. & Hourdez, Stéphane, 2011, Lamellibrachia anaximandri n. sp., a new vestimentiferan tubeworm (Annelida) from the Mediterranean, with notes on frenulate tubeworms from the same habitat, Zoosystema 33 (3), pp. 245-279 : 272

Siboglinum cf. carpinei

Specimens resembling Siboglinum carpinei Ivanov, 1970 (type locality near Corsica) were collected from Milano mud volcano ( Table 1, dive MN5). The tubes are 0.10 to 0.12 mm in diameter, with regular, narrow, reddish-brown rings separated by colourless interspaces (Fig. 17A, B). The anterior part of the tube is divided into segments with 7 to 9 rings, demarcated by slight constrictions of the tube wall (Fig. 17A, C). The animals have a single pinnulate tentacle, a forepart about 0.5 mm long and three girdles (annuli) of chaetae. Some tube fragments from Amsterdam MV ( Table 1, dive MN8) are similar in size and pattern. Fragments of wider tubes (0.27 to 0.3 mm diameter) also found at Milano Mud Volcano ( Table 1, dive MN5), are uniformly dark brown and lack any trace of rings or segments. The difference in size and colour from the tubes of the suspected Siboglinum carpinei suggests that they belong to a second frenulate species,perhaps of another genus. It is not possible to make a more definite identification, based on these tubes alone.