Levidorum hartmanae Perkins, 1987

Nygren, Arne, 2004, Revision of Autolytinae (Syllidae: Polychaeta)., Zootaxa 680, pp. 1-314: 89-90

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Levidorum hartmanae Perkins, 1987


Levidorum hartmanae Perkins, 1987  (Fig. 37 A –D)

Levidorum hartmanae Perkins, 1987: 168  , figs 4 A –F, 5 A –E.

Material examined. USA: holotype USNMAbout USNM 97438, Gulf of México, Florida Shelf, 70 miles West of Sanibel Island, 26 ° 24 'N 83 ° 22 'W, 55 m, 7 Dec 1966; paratype USNMAbout USNM 97439, Gulf of México, Florida shelf, 65 miles west of Egmont Key, 27 ° 37 'N 83 ° 58 W, 55 m, 21 Jan 1967.

Diagnosis. Levidorum  with simple chaetae with 2 distal teeth, faint denticulation present below teeth.

Description. Holotype complete, in two fragments. Length 8 mm for 50 chaetigers, width 0.6 mm (Paratype complete, 3.9 mm for 37 chaetigers). Preserved material yellowish white, without colour markings. Body swollen from chaetiger 2–11 (Fig. 37 A), tapering towards the end. Ciliation not observed.

Four eyes, with lenses, laterally positioned on dorsal and ventral side; dorsal pair larger. Palps absent. Nuchal epaulettes absent. Antennae and dorsal cirri absent (Fig. 37 A, B).

Parapodial lobes rounded, very small. Anterior chaetigers with 2 aciculae, 1 in median and posterior. Chaetal fascicle with 3–4 chaetae in anterior chaetigers, 2–3 in median and posterior. All chaetae simple, club shaped, with 2 teeth (Fig. 37 D); small distal tooth; serration present (Fig. 37 D). Bayonet chaetae absent.

Pharynx with sinuation anterior and lateral to proventricle. Trepan in chaetiger 2 (chaetiger 1 in paratype) with 5 long equal teeth (Fig. 37 C). Basal ring present; infradental spines absent. Proventricle equal in length to 2.5–3 segments in chaetiger 2–4 with 25–30 rows of muscle cells. Pygidium without anal cirri (lost?).

Reproduction and morphology of epitokous stages. Anterior scissiparity from behind chaetiger 14. The rear fragment of the paratype is a stolon (Fig. 37 B), eyes not developed, nor swimming chaetae. The anterior fragment consists of 14 chaetigers.

Habitat. 55 m.

Distribution. North West Atlantic, Gulf of México. Only known from type locality. Remarks. Levidorum hartmanae  differs from L. scotarium  in lacking palps, having eyes, and in the shape of chaetae with 2 distal teeth; in L. scotarium  only one teeth is present. Levidorum hartmanae  differs from L. pettibonae  and L. pori  in having smaller anterior pair of eyes, in the two latter taxa, the anterior pair is larger. The chaetae in L. hartmanae  is quite different from those found in L. pettibonae  , but very similar to those found in L. pori  .


Smithsonian Institution, National Museum of Natural History














Levidorum hartmanae Perkins, 1987

Nygren, Arne 2004


Levidorum hartmanae

Perkins 1987: 168