Hartmaniella

Carrera-Parra, Luis F., 2003, Redescription of Hartmaniella tulearensis n. comb. (Amoureux, 1978) with comments on Hartmaniella sp. and affinities of the family (Polychaeta: Hartmaniellidae), Journal of Natural History 37 (1), pp. 49-55 : 52-54

Hartmaniella sp.

( figure 2 a–h)

Hartmaniella sp. A Gathof, 1984: 57.1–57.3, figure 2 a–k.

Material examined. USNM89732 (one specimen), off Panama City, Florida (29 ° 30 ∞ 02 ◊ N, 86 ° 24 ∞ 59 ◊ W), Mafla Sta. V- 2536, 189 m. USNM89731 (one specimen), off Apalachicola River (28 ° 49 ∞ 59 ◊ N, 85 ° 37 ∞ 02 ◊ W), Mafla Sta. IV- 242, 175 m.

Characterization. Specimens incomplete, in poor condition (USNM89731 specimen without anterior end; USNM89732 specimen with L10 = 2.5 mm and W10 = 0.3 mm). Prostomium rounded, wider than long, without eyes, antennae or nuchal organs. Peristomium laterally projected over prostomium, smooth; with two peristomial rings, first one dorsally reduced, the second one, wider dorsally than ventrally ( figure 2a, b ). The next segment is apodous. The third segment is chaetiger 1; from setiger 6 to end, all segments are biannulated. First region, setigers 1–5, all parapodia with digitiform dorsal cirri and globular ventral cirri, both of similar length ( figure 2c ). First three parapodia tiny, lateral and the last two have dorsal cirri displaced towards the dorsum. Second region, setigers 6–31, all parapodia with erect, bifid dorsal cirri on the dorsum; ventral cirri tapering, smaller than dorsal cirri. A foliose parapodial branchia dorsal to presetal lobes, digitiform, as long as the dorsal cirri ( figure 2d ). A bundle of cilia attached to the basal end of dorsal cirri between it and the branchia. Because of the small number of setigers in both specimens, the third region was not observed.

Setae include limbate marginally serrated, composite spinigers from first setiger, with long appendage and shaft with margins spinulose distally, internally with base granulated becoming canaliculated from median to distal end ( figure 2e ); acicular spines from setiger 6, with a long mucro ( figure 2f ). Acicula yellow, aristate, sub-distally hirsute with a long mucro with fine bristles ( figure 2g ).

Asymmetric maxillary apparatus in poor condition, broken in several parts during earlier dissections ( figure 2h ). Mandibles black, not fused. Maxillary carriers as long as MI, rounded posteriorly. MI with lateral spur on the posterior end; with five teeth, the distal tooth longer; MII with six teeth; MIII present only on the left side, with two teeth of similar size; MIV with one tooth on the left side, with two teeth on the right size.

Remarks. Because of the poor condition of the specimens, it was impossible to make a complete description of characters. Nevertheless, it appears to be an undescribed species, which differs from Hartmaniella erecta Imajima and H. tulearensis (Amoureux) mainly in having a smooth peristomium.

Figures

FIG. 2. Hartmaniella sp. (a) Anterior end in dorsal view; (b) anterior end in lateral view; (c) parapodium from first region; (d) parapodia from second region; (e) composite spiniger; (f) acicular spine; (g) acicula; (h) maxillary apparatus (schematic). Scale bars: (a, b, h) 0.2 mm; (c) 0.05 mm; (d) 0.1 mm; (e, f, g) 0.01 mm.