Austronanus dubius Hale 1937, comb. nov.
Austronanus dubius (Hale, 1937), comb. nov. (Fig. 9) Paramunna dubia Hale, 1937: 40, fig. 16. Austrosignum dubia .— Menzies, 1962: 44. Remarks on type material. The anterior part of the body is somewhat flattened artificially, making it broader than the posterior pereonites. Material examined Holoty...
| Main Authors: | , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
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Zenodo
2006
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| Subjects: | |
| Online Access: | https://doi.org/10.5281/zenodo.6254989 http://treatment.plazi.org/id/463E7938475BFFA32E4DFD1AFE1CFBD3 |
| Summary: | Austronanus dubius (Hale, 1937), comb. nov. (Fig. 9) Paramunna dubia Hale, 1937: 40, fig. 16. Austrosignum dubia .— Menzies, 1962: 44. Remarks on type material. The anterior part of the body is somewhat flattened artificially, making it broader than the posterior pereonites. Material examined Holotype . Ψ, 1.80 mm, Main Base, Commonwealth Bay, Adelie Land, Antarctica, 67°S 142°36'E, 25–30 fms [46–55 m], 3 September 1912, Hunter, SAMA C4346. Description. Body width 0.47 length in female, widest at pereonite 2 or 3. Head length 0.63 width; length posterior to eyestalks 0.75 anterior length. Frontal margin lobe length 0.78 head length; apex bluntly angular in dorsal view, frontal margin adjacent to apex convex, not sinuous. Eyestalks lateral apex rounded, globular, shaft before apex slightly constricted with neck, long axis angling forward at approximately 40°, about as long as wide in dorsal view. Pereonite lateral margin 1–4 linear, 5–7 rounded. Pereonite 5 in dorsal view distinctly narrower than pereonites 4 and 6. Pereonite lateral margins 6–7 finely denticulate. Pleon length 0.95 width; pleotelson proximal margin length shorter than lateral margin length. Pleonite 1 width 1.0 distance between uropods, length 0.14 width. Pleotelson proximal margins set at 45º angle with medial axis of pleon, merging into lateral margin without noticeable angle, lateral margins denticulate, with 14–16 denticles per side; posterior margin forming 125° angle, with 3 uniformly fine denticles laterally each side. Antennula articles 1 and 2 combined reaching eyestalk apex; article 1 longer and broader than 2, inflated, 5–6 of subequal length, longer than articles 3–4. Antenna article 2 lateral margin with two spines (proximal spine tiny); article 3 in ventral view distally expanded, distolateral margin angular, width 0.64 length, with crenate flange on lateral margin, flange coarse with rectangular subunits, with 1 distal spine; article 5 only slightly longer than article 4; flagellum with 5 articles, proximal article 1.5 length of ... |
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