Eurythoe complanata (Pallas, 1766)

Arias, Andres, Barroso, Romulo, Anadon, Nuria & Paiva, Paulo C., 2013, On the occurrence of the fireworm Eurythoe complanata complex (Annelida, Amphinomidae) in the Mediterranean Sea with an updated revision of the alien Mediterranean amphinomids, ZooKeys 337, pp. 19-33 : 23

Eurythoe complanata (Pallas, 1766) Fig. 2 G–J

Aphrodita complanata Pallas, 1766: 109, pl. 8, fig. 19-26. Type locality: Antigua Island, Caribbean Sea.

Eurythoe brasiliensis Hansen, 1882: 4, fig. 5-9.

Lycaretus neocephalicus Kinberg, 1867: 55-56.

Eurythoe kamechameha Kinberg, 1857: 14; 1910: 36, pl. 12, fig. 13.

Eurythoe pacifica Kinberg, 1857: 14; 1910: 36, pl. 12, fig. 11.

Eurythoe indica Kinberg, 1867: 90.

Eurythoe alboseta Kinberg, 1857: 90.

Eurythoe ehlersi Kinberg, 1867: 90.

Eurythoe havaiva Kinberg, 1867: 90.

Eurythoe corallina Kinberg, 1857: 14; 1910: 36, pl. 12, fig. 12.

Eurythoe alcyonaria Gravier, 1902: 83, fig. 38, b-m.

Material examined.

Eurythoe complanata : Isabel II Island (Chafarinas Islands, Spain), 35°11'N, 2°26'W (Sep. 1992): MNCN 16.01/3337 (2 specimens), MNCN 16.01/3338 (2 specimens), MNCN 16.01/3340 (1 specimen); Congreso Island (Chafarinas Islands, Spain), 35°11'N, 2°26'W (Jul. 1993): MNCN 16.01/3336 (1 specimen); Isabel II Island (Chafarinas Islands, Spain), 35°11'N, 2°26'W: MNCN 16.01/33394 (2 specimens). Atlit (Israel), 32°41'N, 34°56'E (1937): BMNH 1937.4.7.1-5 (7 specimens).

Diagnosis and description.

Israeli specimens ranged from 20 to 45 mm in length with a mean of 31 mm (N=7, SD=9.77). Prostomium rounded with 2 pairs of eyes arranged in a square, the first being larger (Fig. 2G), and with three antennae, lateral ones in an anterior position and the single one slightly posterior. Anterior end with a bilobed prebuccal lobe, carrying a pair of cirriform palps. The caruncle is elongated and extends until the third chaetiger (Fig. 2G). Each segment is provided with a pair of arborescent branchiae that are present from the second chaetiger to the posterior end. Biramous parapodia with dorsal and ventral cirri digitiform, similar in size. Notochaetae of three types: harpoon-like (Fig. 2H); spurred capillaries with small spurs (Fig. 2I) and thicker smooth notochaetal spines (Fig. 2J). Notoacicula are very small, hastate, limited in number and always form an arc immediately in front of the dorsal cirrus. Neurochaetae are bifurcate, with prongs of different lengths.

Remarks.

One specimen regenerating the posterior end. Pairs of eyes inconspicuous in some specimens, but always with the anterior pair larger than posterior pair. Specimens from Chafarinas Islands had a mean size of 37 mm (N= 8, SD = 7.24). All preserved specimens had a brownish colour.