Aponuphis brementi ( Fauvel, 1916 )

Arias, Andrés & Paxton, Hannelore, 2015, Onuphis and Aponuphis (Annelida: Onuphidae) from southwestern Europe, with the description of a new species, Zootaxa 3949 (3), pp. 345-369 : 360-361

Aponuphis brementi ( Fauvel, 1916)

Figure 7 C

Hyalinoecia brementi Fauvel, 1916: 5 , figs. 2–3 ( Monaco, Mediterranean).

Aponuphis brementi . — Paxton 1986: 54 (new combination).

Hyalinoecia fauveli Rioja, 1918: 45 (Santander, Spain); Fauvel 1923: 424, fig. 167a–h (Santander, Spain); 1938: 15 (Venice Lagoon, Adriatic Sea); Bellan 1960: 18 ( Portugal); 1969: 44 (Madeira); Amoureux 1972: 16 (Galicia, Spain); 1973: 440 (northern Spain, Bay of Biscay); 1974: (Aveiro, Portugal); Hartmann-Schröder 1977: 89 ( Portugal).

Aponuphis fauveli .— Paxton 1986: 54 (new combination); Aguirrezabalaga et al. 2002: 27 (Bay of Biscay).

Material examined. Type material. Three syntypes of Hyalinoecia brementi ( MOM 182438), Pointe de la Vieille, Monaco; holotype of Hyalinoecia fauveli Rioja, 1918 ( MNCN 16.01.309), Santander, in the sandbank of Enmedio, northern Spain.

Non-type material. One specimen ( MNCN 16.01/16167) COCACE station: D3 (43.85º N, 5.68º W), N. Spain, Cantabrian Sea, Bay of Biscay, 162 m, 89.06 % sand, 4.76 % silt, 6.18 % clay, 29 Jun 1987; 3 specimens ( MNCN 16.01/16168) COCACE station: E2 (43.78º N, 6.08º W), N. Spain, Cantabrian Sea, Bay of Biscay, 190 m, 3 Jun 1987; 4 specimens ( MNCN 16.01/16169) COCACE station: E2 (43.78º N, 6.08º W), N. Spain, Cantabrian Sea, Bay of Biscay, 190 m, 3 Jun 1987; 24 specimens ( MNCN 16.01/16170) COCACE station: C5 (43.83º N, 5.81º W), N. Spain, Cantabrian Sea, Bay of Biscay, 150 m, 28 Apr 1987; 8 specimens ( MNCN 16.01/16171) COCACE station: D2 (43.81º N, 5.75º W), N. Spain, Cantabrian Sea, Bay of Biscay, 161 m, 90.88 % sand, 3.46 % silt, 5.66 % clay, 29 Jun 1987; 2 specimens ( MNCN 16.01/16172) COCACE station: C7 (43.81º N, 5.98º W), N. Spain, Cantabrian Sea, Bay of Biscay, 146 m, 98.58 % sand, 0.40 % silt, 1.02 % clay, 4 Jul 1987; 41 specimens ( MNCN 16.01/1826, MNCN 16.01/1831; MNCN 16.01/1832, MNCN 16.01/1839, MNCN 16.01/1840, MNCN 16.01/ 1842, MNCN 16.01/2164, MNCN 16.01/2166, MNCN 16.01/2167, MNCN 16.01/2174, MNCN 16.01/2181, MNCN 16.01/2642, MNCN 16.01/2666, MNCN 16.01/2668) off shore between San Antonio cape and Valencia harbour, E. Spain, western Mediterranean, 3–30 m, 26 Apr 1996; 1 specimen ( MNCN 16.01/5908) Salobreña, S. Spain, western Mediterranean, 20.5 m, 1 Jul 1999; 2 specimens ( MNCN 16.01/6034) off shore between Sagunto Port and Castellón harbour, E. Spain, western Mediterranean, 3–30 m, 23 Sep 1999; 6 specimens ( MNCN 16.01/ 8743, MNCN 16.01/8798) off shore Punta Torrox, E. Spain, Alborán Sea, western Mediterranean, 3–30 m, 17 Apr 2002.

Type locality. Monaco, Mediterranean.

Diagnosis. Antennae usually to chaetiger 15–20, maximally to 20; four to seven ceratophoral rings on median antenna, six to nine usually on lateral antennae, maximally 11. Anterior four to six chaetigers with several tridentate pseudocompound hooks, chaetigers 5 to 8 with one hook only, rarely bidentate; slender long-appendaged hooks present. Ventral cirri subulate on first five to seven chaetigers. Subacicular hooks from chaetiger 12–15. Branchiae from chaetiger 1–2. Colour pattern ( Fig. 7 C) consisting of two large dorsal spots on peristomium and chaetigers 1–4, and two segmental lateral spots from chaetiger 1. From chaetiger 5 central spots becoming progressively smaller and thinner, by chaetiger 10 represented only by thin band. Maximum width without parapodia 1.6 mm.

Remarks. In very small specimens the branchiae start on chaetiger 6. From here they spread more posteriorly but also anteriorly. When the worm has attained about two-thirds of its maximum size the branchiae begin on chaetiger 1–2 which is considered here as the adult condition of the species. We have examined the syntypes of A. brementi and found that in the larger two specimens (0.6–0.8 mm wide) the branchiae started on chaetiger 2 as stated in original description, while in the smallest one (0.4 mm wide) the origin was chaetiger 4 and 5. The holotype of Hyalinoecia fauveli Rioja, 1918 has been examined and found to fit within the range of Aponuphis brementi and is here considered to be its junior synonym.

Distribution. East Atlantic, Mediterranean.

Figures

FIGURE 7. Aponuphis spp. photomicrographs showing its characteristic colour patterns. A, A. bilineata morph 1 (typical); B. A. bilineata morph 2; C, A. brementi; D – E, A. ornata; G, recently settled juvenile of A. ornata; H, brooding juvenile of A. ornata.