Macrostylis uniformis Riehl & Brandt, 2010

Riehl, Torben & Brandt, Angelika, 2013, Southern Ocean Macrostylidae reviewed with a key to the species and new descriptions from Maud Rise, Zootaxa 3692 (1), pp. 160-203 : 193

Macrostylis uniformis Riehl & Brandt, 2010

urn:lsid:zoobank.org:act:5105DA6E-E793-42B6-A5D7-A4D9F8C5933A Macrostylis uniformis Riehl & Brandt, 2010 ; pp. 19–29, Figs 3–8 .

Modified diagnosis. Body heavily calcified, cuticular setules absent. Pereonite 4 width subequal pereonite 5 width, lateral margins convex, posterolateral margins not produced posteriorly, posterolateral setae absent. Pleotelson ovoid, waist absent, posterior apex length about 0.20 pleotelson length. Antenna article 2 elongate, longer than article 1. Mandible incisors simplified, monodentate, bluntly rounded. Pereopod III ischium dorsal lobe tapering, with 2 prominent apical setae. Pereopod V ischium distodorsally with setae present. Operculum ovoid, lateral fringe of setae with fluent transition to apical row of setae. Uropod protopod distal margin slightly extending laterally, endopod articulation subterminally.

Figures

FIGURE 3. Macrostylis scotti n. sp. A – E, holotype adult male (ZMH K- 42990), with ciliate epibionts. A, lateral habitus, ornamentation omitted, setae simplified, uropods partially omitted. B, dorsal habitus, ornamentation omitted, setae simplified, areas free of imbricate ornamentation indicated by thin dashed lines on pereonites 6 – 7. C, pereopod III, ischium dorsal apex proximal prominent seta damaged. D, ciliate epibiont. E, ventral pleotelson, left setal ridge and ventral setation on left pleopod II omitted. Scales: A, B, E = 0.5 mm, C = 0.3 mm, D = 0.1 mm.

FIGURE 4. Macrostylis scotti n. sp. A – H, paratype non-ovigerous female (ZMH K- 42992). A, dorsal habitus, impricate ornamentation (IO) omitted. B, antennula and antenna, in situ. C, ventral pleotelson, IO omitted. D, lateral habitus, IO omitted, setae simplified. E, ventral pleopod V. F, ventral pleopod IV. G, ventral pleopod III. H, ventral pleopod II (operculum). Scales: A, C, D = 0.5 mm, B = 0.2 mm, E – H = 0.3 mm.

FIGURE 5. Macrostylis scotti n. sp. A – C, paratype non-ovigerous female (ZMH K- 42992). A, pereopod II. B, pereopod IV. C, pereopod III. Scale: A – C = 0.3 mm.

FIGURE 6. Macrostylis scotti n. sp. A – C, paratype non-ovigerous female (ZMH K- 42992). A, pereopod V. B, pereopod VI. C, pereopod VII. Scale: A – C = 0.3 mm.

FIGURE 7. Macrostylis scotti n. sp. A – I, paratype adult male (ZMH K- 42991). A, habitus dorsal. B, habitus lateral. C, antennule and antenna, in situ. D, pleotelson, ventral. E, pleopod V, ventral. F, pleopod IV, ventral. G, pleopods I ventral. H, pleopod III, ventral. I, pleopod II, dorsal. Scales: A, B: 1.0 mm; C, E – I = 0.2 mm; D = 0.5 mm.

FIGURE 8. Macrostylis scotti n. sp. A – J, paratype adult male (ZMH K- 42991) mouthparts. A, left mandible, dorsal. B, left mandible incisor process, medial. C, paragnaths, ventral, setae omitted on right side. D, right mandible incisor process, medial. E, right mandible, dorsal. F, maxillula, ventral, with medial lobe flipped over. G, maxilliped, ventral. H, maxilliped endite, dorsal. I, fan seta. J, maxilla, ventral. Scales: A – J = 0.1 mm.