Austrosignum pilosum Just & Wilson 2021, sp. nov.
Austrosignum pilosum sp. nov. (Fig. 1) Type fixation. Holotype , T ♂, AM P60883. —Here designated. Etymology. The epithet is from the Latin pilosus (= hairy), which alludes to many long setae on the dorsal surface. Type Locality. Macquarie Island, Australia. Material examined. Holotype . T ♂, 1.8 mm...
| Main Authors: | , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
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Zenodo
2021
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| Subjects: | |
| Online Access: | https://doi.org/10.5281/zenodo.4690282 http://treatment.plazi.org/id/03C487E3782B642CFF09EA7DEA1CFD10 |
| Summary: | Austrosignum pilosum sp. nov. (Fig. 1) Type fixation. Holotype , T ♂, AM P60883. —Here designated. Etymology. The epithet is from the Latin pilosus (= hairy), which alludes to many long setae on the dorsal surface. Type Locality. Macquarie Island, Australia. Material examined. Holotype . T ♂, 1.8 mm. Aerial Cove, Macquarie Island, Australia, 54°29’S, 158°57’E, coll. R. Ricker, 12 Dec 1977, from algae in Durvillea zone, MA–111, AM P60883. Paratype . Nearly T ♂, 1.3 mm, Caroline Cove, Macquarie Island, Australia, inner cove north of hut, 54°46’S, 158°48’E, 13 m, Codium flat adjacent to Macrocystis bed, 17 January 1978, J.K. Lowry (SCUBA), stn MA-311, NMV J52113. Description (terminal male). Body tapering posteriorly, width 0.52 length, widest at pereionite 2 and 3. Head length 0.44 width; length posterior to eyestalks 1.4 anterior length. Frontal margin broadly rounded. Eyestalks length 4 times width, apex rounded, long axis angling forward at 35–40°. Pereionites lateral margin 1–7 rounded. Pereionites 1–3 coxae barely visible in dorsal view except on pereionite 2; coxae visible on pereionites 4–7, rounded, each with single simple seta. Pereionite 1 sagittal length in male 1.9 pereionite midline length. Pleon length 1.4 width. Pleonite 1 width 0.8 distance between uropods, length 0.3 width. Pleotelson lacking inflection (‘neck’) between lateral and proximal margins; lateral margin s convex, smooth; posterior margin apex narrowly rounded; posterior margin forming 80° angle, set apart from lateral margins by concavity distal to uropods. Antennula articles 1–2 combined extending beyond eyestalk apex; article 1 tubular, length and width subequal to 2; articles 4–6 of subequal length, all shorter than 3, (left side of holotype aberrant with 2 short terminal articles only). Antenna article 3 tubular, width 0.43 length, article 5 distinctly longer than article 4; flagellum with 7 articles, proximal article subequal to article 2, distal articles shorter. Pereiopod I basis anterior margin smooth, length 2.1 width; merus ... |
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