Harmothoe impar (Johnston, 1839)

Barnich, R. & Fiege, D., 2000, Revision of the Mediterranean species of Harmothoe Kinberg, 1856 Lagisca Malmgren, 1865 (Polychaeta: Polynoidae: Polynoinae) descriptions of a new genus and a new species, Journal of Natural History 34, pp. 1889-1938 : 1906-1907

Harmothoe impar (Johnston, 1839)

(fi gure 9A -D)

Polynoe impar Johnston, 1839: 436 , pl. 22: fi gures 3-9.

Polynoe reticulata ClapareÁde, 1870: 374 , pl. 1: fi gure 1a -f; von Marenzeller, 1874: 412; Bobretzky, 1882: 185.

Harmothoe impar: Fauvel, 1923: 59 , fi gure 21a -f [part]; Bellan, 1964a: 24 [part]; Campoy, 1982: 63 [part]; Tebble and Chambers, 1982: 40, fi gures 7b, 12b -c, 38 [part]; Hartmann- SchroÈder, 1996: 48, fi gure 13 [part]; Chambers and Muir, 1997: 106, fi gure 27.

Harmothoe reticulata: Fauvel, 1923: 61 , fi gure 22f -l; Bellan, 1964a: 25; Campoy, 1982: 70, fi gure 5.

Harmothoe boholensis: Rullier, 1963: 177 .

Tricosmochaeta trilobocephala Morgera, 1918: 1 , pl. 1: fi gures 1-13.

Type material. No type material available of Polynoe impar , Polynoe reticulata and Tricosmochaet a trilobocephal a.

Additional material. 1 spm., 5 April 1998, Crete, Hersonissos Beach , 25 km E of Iraklion, 1-2 m, between algae, leg. D. Fiege and R. Barnich, SMF 9209 /1. 14 spms. from the British Isles, including 3 spms. from Berwick-upon-Tweed, the type locality

Polynoe impar , provided by S. Chambers, NMS.

Diagnosis. Anterior pair of eyes dorsolaterally on widest part of prostomium. Elytra: margin with fringing papillae; surface covered by conical microtubercles and few scattered papillae, with a row of rather indistinct conical to cylindrical macrotubercles near posterior margin; tubercles grouped on mounds, not isolated. Dorsal and ventral tentacular cirri and dorsal cirri papillate, swelling subdistally then abruptly tapering to fi liform tip.

Description. Prostomium bilobed, with distinct cephalic peaks; median antenna with large ceratophore in anterior notch, style papillate, swelling subdistally then abruptly tapering to fi liform tip, showing a pigmented band basally and two distally; lateral antennae with small ceratophores inserted ventrally and with short, papillate

Revision of the Mediterranean Harmothoe and L agisca 1907 IG. 9. Harmothoe impar (5 April 1998, Crete, SMF 9209/1). (A) Anterior end; styles of right dorsal tentacular cirrus and of right dorsal cirrus from chaetiger 3 missing; dorsal view; (B) left anterior elytron; (C) detail of posterior margin of same; (D) style of dorsal cirrus (scales 5 1 mm for A, B; 100 M m for C; 500 M m for D).

styles, swelling subdistally then abruptly tapering to fi liform tip, each with a pigmented band basally and one distally; palps papillate, shorter than median antenna and tentacular cirri; anterior pair of eyes dorsolaterally on widest part of prostomium, posterior pair dorsally near hind margin. Tentaculophores inserted laterally to prostomium, each with one or two chaetae and a pair of papillate dorsal and ventral tentacular cirri, swelling subdistally then abruptly tapering to fi liform tip, and with pigmented band basally and two distally. Second segment with fi rst pair of elytra, biramous parapodia, and long ventral buccal cirri, similar to tentacular cirri

gure 9A).

Fifteen pairs of elytra; elytral margin with fringing papillae; surface covered by conical microtubercles and few scattered papillae, with a row of rather indistinct conical to cylindrical macrotubercles near posterior margin; tubercles grouped on mounds, not isolated; surface with two dark pigmented wedge-shaped areas with a reticulate pattern, surrounding a lighter, yellow area (in living specimens) (fi gure 9B,). Styles of dorsal cirri papillate, swelling subdistally then abruptly tapering to liform tip, extending beyond neurochaetae, each with a pigmented band basally and two distally (fi gure 9D); styles of ventral cirri papillate, tapering, shorter than neuropodia.

Parapodia biramous, both rami with single aciculum penetrating epidermis; notopodia with short, rounded presetal and longer, pointed postsetal acicular lobe, neuropodia with subconical presetal acicular lobe with digitiform supra-acicular process and shorter rounded postsetal lobe. Notochaetae stouter than neurochaetae, with distinct rows of spines and blunt tips; neurochaetae with distinct rows of spines only in distal part and bidentate tips with secondary tooth, some lower unidentate.

Remarks. (1) As the description and fi gures of Harmothoe impar in Johnston 1908) are rather poor and especially the ornamentation of the elytra is insu ffi ciently