Heteromesus oryktus Cunha & Wilson 2006, sp. nov.
Heteromesus oryktus sp. nov. (Figs 24–25) Etymology Oryktos means "digger" (Greek, masculine) because this species was collected from mudstone burrows possibly made by the animals. Material examined Holotype: female (6.1 mm), North Atlantic: off West Greenland, canyon bordering the western...
Main Authors: | , |
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Format: | Other/Unknown Material |
Language: | unknown |
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Zenodo
2006
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Online Access: | https://doi.org/10.5281/zenodo.5064428 http://treatment.plazi.org/id/EB65B41CFFAFE4336A4DFD9BD5AD9038 |
Summary: | Heteromesus oryktus sp. nov. (Figs 24–25) Etymology Oryktos means "digger" (Greek, masculine) because this species was collected from mudstone burrows possibly made by the animals. Material examined Holotype: female (6.1 mm), North Atlantic: off West Greenland, canyon bordering the western margin of the Fylla Structural Complex, 63º14.1’N, 55º26.0’W, 18.Aug 2003, R / V Prof Logachev, TTR13 stn AT457GR, 2140 m (ZMUC CRU9872) Paratype: male (5.7 mm), same data as holotype (ZMUC CRU9873). Diagnosis Pereonites 1–3 with anterolateral denticulate spines; pereonites 1–4 with median and paired lateral denticulate spines arranged in dorsal rows. Pereonite 1 of male with paired lateral rook spines. Pereonite 5 in female length 2.2 width, in male 4.1 width. Pleotelson posterolateral margin anterior to uropods without spines or tubercles. Antennula with 5 articles altogether; article 3 length similar to article 4. Uropods in male length 0.45 length of pleotelson. Description Body length in female 6.1 mm; granular. Head in female length 0.60 width, with 1–2 pairs of simple spines, cuticular structure fine spinous granulations, lobe on ventrolateral margin absent in lateral view. Pereonite 1 in female width 0.20 total body length; with median simple spine, 2–3 pairs of dorsal simple spines, 1 pair of anterolateral simple spines, 2 pairs of lateral simple spines. Pereonite 2 in female with median simple spine, 2 pairs of dorsal rook spines, 2 pairs of lateral simple spines. Pereonite 3 in female with median simple spine, 2–3 pairs of dorsal simple spines, 1 pair of lateral simple spines. Pereonite 4 length 0.65 width; with 2 pairs of dorsal simple spines. Pereonites 1–4 in female with spines stout to short, denticulate and topped by setae; anterolateral spines decreasing in length from pereonite 1 to pereonite 3, length distinctly less than length of pereonite 1. Pereonite 5 in female length 0.25 total body length. Pereonite 5 with lateral row of setae. Pleotelson in female length 1.5 width. Antennula in female article 2 ... |
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