“Jasmineira regularis n. sp.
Figs. 41a-41g
Material. Weddell Sea, in 512-2936 m: Station 68-1 (holotype and about 150 paratypes, USNM 47095-6); 68-55 (3 specimens); 69-1 (10 specimens); 69-6 (7 specimens); 69-7 (32 specimens); 69-8 (25 specimens); 69-10 (2 specimens). Hero Inlet, in 40 m (24+ specimens).
Description. All except one small specimen have lost the tentacular crown; this crown consists of five pairs of radioles that are free to the base; the pinnules are long and are inserted in double rows. The distal end of the radiole is a smooth tip nearly as long as the pinnuled portion. In larger specimens the length of the body without the crown is 10-16 mm, and the width is 1.1-2.0 mm. The body is long, depressed and cylindrical, tapering to a narrow pygidium with a long caudal filament in juveniles (Figure 41 b) and a short filament (if any) in the largest individuals. A middorsal longitudinal groove extends from the small dorsal notch in the collar to the posterior end of the thorax, where it turns obliquely right and continues midventrally (Figure 41a). The body consists of eight thoracic and 24-28 abdominal setigers. A transverse ciliary band encircles the body on setiger 2. Under high magnification it is seen to consist of series of groups of cells with numerous rows of cilia.
The two-lobed collar is deep and equally high all around or slightly higher midventrally; it has a small middorsal and a deep midventral incision, where the medial ends are broadly rounded (Figure 41 a). There are 8-10 collar setae in a fascicle; all are narrowly limbate, the upper ones being the longest. Ventral gland shields are broadly rectangular and undivided beginning on thoracic setiger 3.
Thoracic setigers 2-8 have upper limbate notosetae (Figure 41c) and more numerous lower submucronate notosetae (Figure 41d). Thoracic neuropodia have long-handled uncini with slightly curved shafts terminating in long fangs (Figure 41e) nearly at right angles to the shafts; each fang is surmounted by many small teeth, which can be seen in frontal view (Figure 41e, 41f).
Abdominal setigers have long-stemmed S-shaped avicular uncini in notopodia (Figure 41g).
Remarks. Jasmineira regularis differs from J. bermudensis Hartman [1965, p. 233] in that the first has a thoracic collar high all around, whereas the second has the collar highest ventrally; the first has thoracic notosetae entirely limbate, whereas the second has spatulate setae in the middle of the fascicle. Jasmineira macrophthalma Ehlers [1913, p. 578] has a pair of prominent semicircular eyes in the buccal segment. Jasmineira caeca Ehlers [1913, p. 579] has a pair of prominent glandular pads extending back to the third setiger. Jasmineira scotti Benham [1927, p. 121] is unique in having two vascular loops within the dorsal collar lobes that resemble those in Fabrisabella Hartman [1969, p. 699].”
(Hartman, 1978)
