Crepis longipes Jullien, 1882

Reverter-Gil, Oscar, Souto, Javier & Fernández-Pulpeiro, Eugenio, 2011, Revision of the genus Crepis Jullien (Bryozoa: Cheilostomata) with description of a new genus and family and notes on Chlidoniidae, Zootaxa 2993, pp. 1-22 : 2-4

Crepis longipes Jullien, 1882

( Figs 1–4 ; Table 1)

Crepis longipes Jullien, 1882: 522 , pl. 17, figs 60, 61; Prenant & Bobin 1966: 366, fig. 119; d’Hondt, 1973a: 367; 1974: 29. Not Crepis longipes: Harmer 1926: 318 , pl. 15, fig. 19; Silén 1941: 69, figs 83, 84; Harmelin & d’Hondt 1992: 39, pl. 3, figs C, D.

Material examined. Lectotype (designated here): MNHN 1995, ‘ Travailleur ’ D. 2 (1st ser.), 41º43’ N, 11º39’40” W, 1068 m. Other Material Examined: MNHN 3783 (part), MNHN 3900 (part), same locality as lectotype. MNHN 6908, MNHN 6961 (part), ‘ Thalassa ’ 471, 43°40.0’ N, 08°57.2’ W, 574– 562 m. MNHN 7142 (part), MNHN 7145 (part), ‘ Thalassa ’ W446, 44°12.8’ N, 08°40.0’ W, 620– 650 m. MNHN 7269 (part), ‘ Thalassa ’ 1968, 44°11.0’ N, 08°40.2’ W, 450– 500 m. MNHN 7621 (part), ‘ Thalassa ’ U852, 44°12.0’ N, 08°34.0’ W, 615– 645 m. J.-G. Harmelin personal collection, ‘ Thalassa ’ Y433, 44º12.0’ N, 08º40.5’ W, 605– 620 m.

Description. Colony adnate, delicate, in branching uniserial series. Autozooids comprising an oval distal dilatation with rounded distal rim, and a slender tapering cauda of about the same length. Lateral walls irregular in their basal contact with substratum; somewhat sloping all round, with smooth exterior-walled (gymnocystal) calcification. Gymnocyst mostly reduced to the proximal cauda. Dilatation with extensive area of membranous frontal wall attached to oval rim that is higher distally. Underlying cryptocyst flat, granular, merging into marginal rim at its proximal end where the rim is barely evident. Opesia semi-elliptical, occupying one quarter to one third of frontal area, its proximal margin slightly concave.

Branching of colony frequent, autozooids giving rise to two lateral buds from near the middle of the dilatation, their caudae more or less at right angles to parent zooid. Spines and heterozooids absent. Ancestrula and ovicell unknown.

Remarks. Crepis longipes was described from material collected at 1068 m depth off Oporto and at 2018 m depth on Galicia Bank ( Jullien 1882). Calvet (1907) stated that the samples from the first location did not exist, but in fact the only original sample preserved (MNHN 1995) comes from that station. We also examined some colonies from the same locality that were not originally identified (MNHN 3783, MNHN 3900) (see Reverter-Gil & Fernández-Pulpeiro 2001), as well as additional material collected by the Thalassa and partly reported on by d’Hondt (1973a, 1974).

The material of C. longipes examined by us has no trace of membranous frontal wall or opercula and these are not mentioned in the original description ( Jullien 1882). Harmer (1926) stated that in C. longipes the operculum is small, occupying the distal half of the terminal opesia but his material was from the Indo-Pacific and does not correspond to this species (see below).

Crepis longipes was reported from the shallow Indo-Pacific by Silén (1941) and from the Strait of Gibraltar by Harmelin & d’Hondt (1992). These records also correspond to other undescribed species of the genus (see below).

The species has also been reported as fossil by several authors (e.g. Canu & Bassler 1920; Di Geronimo et al. 2005; Rosso 2005) but these records should be checked through study of the original material.

An erect form of the species was described by d’Hondt (1973b) from the area between Madeira and the Iberian Peninsula, at 1015 m depth on the brachiopod Dyscolia wyvilli (Davidson) . The original material could not be found, thus the identification could not be checked.

Crepis longipes sensu stricto seems to have been collected only from localities northwest of the Iberian Peninsula between 450 and 2018 m depth.

Mean SD Minimum Maximum N Frontal surface length 0.527 0.0263 0.493 0.572 8 Frontal surface width 0.310 0.0201 0.290 0.344 8 Opesia length 0.170 0.0102 0.156 0.184 8 Opesia width 0.171 0.0088 0.161 0.187 8 Opesia L/Zooid L 32.3 % 31.6 % 32.2 %

Cauda length 0.450 0.1179 0.280 0.531 5 Cauda width 0.034 0.0078 0.026 0.044 5

SD, Standard deviation; N, number of measurements.

Figures

FIGURES 1 – 4. Crepis longipes Jullien, 1882. 1, autozooids (MNHN 1995, lectotype); 2, same, autozooid and branching; 3, view of colony (Thalassa Y 433); 4, same, branching zooids.