Laubieriopsis fauchaldi ( Katzmann & Laubier, 1974 ) Salazar-Vallejo & Zhadan & Rizzo, 2019

Salazar-Vallejo, Sergio I., Zhadan, Anna E. & Rizzo, Alexandra E., 2019, Revision of Fauveliopsidae Hartman, 1971 (Annelida, Sedentaria), Zootaxa 4637 (1), pp. 1-67 : 50-51

Laubieriopsis fauchaldi ( Katzmann & Laubier, 1974) n. comb.

Fauveliopsis fauchaldi Katzmann & Laubier, 1974: 537–538 , Fig. 4 .

TL: Adriatic Sea. D: Only known from a single locality, 135 m depth.

Type material: Mediterranean Sea , Adriatic Sea, Croatia. Holotype ( NMHW 13225 ), W off Primośten (43°29’ N, 15°15.1’ E), 135 m, no date provided (not seen; 13 mm long, 0.2 mm wide, 47 chaetigers).

Diagnosis. Laubieriopsis with up to 47 chaetigers. First 3 chaetigers with two aciculars per ramus. Median region (6–20) with one notoacicular and neuropodia with an acicular and one capillary; posterior parapodia with one acicular and one capillary chaeta per ramus. Chaetal formula: 2A/2A (ant.: chaetigers 1–4), 1A/1caA (med.: chaetigers 6–20), 1A1c/1c1A (post.: chaetigers 27–end). Pygidium with long papillae. GP unknown.

Remarks. Laubieriopsis fauchaldi is newly combined into Laubieriopsis because its body is long, cylindrical, its integument is smooth (except for a few minute papillae dispersed on body), and transparent. As indicated in the key above, L. fauchaldi resembles L. arenicola by having entire aciculars along anterior chaetigers. They differ in the surface of anterior segments, in their number of segments and in the presence of genital papillae. In L. fauchaldi the body has integument smooth, not annulated, with 47 chaetigers, and there are no genital papillae, whereas in L. arenicola the body has multiannulated segments, at least anteriorly, with 25 chaetigers, and genital papillae are present in chaetiger 6–7.

Although Katzmann & Laubier (1974) indicated that median chaetigers (6–20) have a very strong and recurved capillary, we believe they were comparing the acicular from notopodia with another one from neuropodia. In their figure 4B they illustrate one parapodium (chaetiger 12) with only one acicular on notopodium and one capillary, and another acicular on neuropodium (A/Ac), although they wrote these parapodia have one capillary and one acicular per ramus.

Katzmann & Laubier (1974:537) did not indicate what substrates their specimens were from; however, their tapered and elongate bodies suggest this could be a free-living species, because when specimens are fixed inside shelters their body shape is modified ( Riser, 1987).

Figures

FIGURE 4. Fauveliopsis brevipodus Hartman, 1971, n. comb., holotype (USNM 55546), A. Dorsal view. B. Anterior region, dorsal view. C. Posterior region, dorsal view. Paratypes (USNM 55547). D. Oblique dorsal view. E. Dorsal view. Scale bars: A: 260 µm, B: 100 µm, C: 90 µm, D, E: 0.4 mm.