Jassagruneri Conlan, 1990

(Table 13, Figs 102–103)

Diagnosis.

Both sexes:

Mandibular palp: article 2, dorsal margin without a fringe of setae.

Maxilla 1: without a cluster of setae at the base of the palp article 1.

Gnathopod 1: basis, anterolateral margin with only a few short setae distally; carpus without a single or small cluster of short setae at the anterodistal junction of the propodus.

Gnathopod 2: basis with a few or a full row of setae along the anterolateral margin (setal lengths 50% of the basis width); carpus and propodus, setae on the anterior margin short and simple (setal length <basis width).

Pereopods 5–7: propodus not expanded anteriorly.

Uropod 1: ventral peduncular spinous process underlying about 40% of the longest ramus.

Uropod 3: inner ramus without spines mid-dorsally (with only the single apical spine).

Telson: tip without apical setae (only the usual short setae at each dorsolateral cusp).

Thumbed male: unknown.

Adult female:

Antenna 2: without plumose setae on the flagellum and peduncular article 5.

Gnathopod 2: propodus, palmsinuous.

Remarks. This is a small-bodied species with the juvenile male holotype 2.1 mm and the adult female allotype 3.2 mm (Conlan 1990). It is part of the Southern Hemisphere sinuous-palmed group, keying closest to J. thurstoni . Jassa gruneri differs in the lack of a seta on the carpus of gnathopod 1 at the anterodistal junction of the propodus (present in J. thurstoni) and in the presence of a row of setae on the basis of gnathopod 2 (absent in J. thurstoni). This row is more pronounced in the female allotype than the juvenile male holotype (Fig. 102). Currently it is only known from Tasmania and New Zealand. The New Zealand specimen (Fig. 12) is a juvenile male and was found in a collection in Lyttelton harbour described by Chilton (1884). In this same collection is a specimen used by Chilton to describe his new species Podocerus latipes Chilton, 1884, which was synonymized by Stebbing (1906) under Jassa frequens (Chilton, 1883) and later transfered to Ventojassa (Conlan 2021) .