Marmachius Poore, 2012, n. gen.
Marmachius n. gen. Type species. Marmachius fortunae n. sp., by original designation. Diagnosis . Body weakly geniculate between pereonites 4 and 5, anterior pereon slightly elevated. Head with pair of submedian spines between eyes. Pereonites with supracoxal spines on all pereonites, with paired su...
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| Format: | Other/Unknown Material |
| Language: | unknown |
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Zenodo
2012
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| Online Access: | https://doi.org/10.5281/zenodo.6166957 http://treatment.plazi.org/id/AD5A87E0FFE7FFF92AA8FF42FDB238A0 |
| Summary: | Marmachius n. gen. Type species. Marmachius fortunae n. sp., by original designation. Diagnosis . Body weakly geniculate between pereonites 4 and 5, anterior pereon slightly elevated. Head with pair of submedian spines between eyes. Pereonites with supracoxal spines on all pereonites, with paired sublateral spines (exceptionally long), with paired submedian spines (exceptionally long), with middorsal spines on posterior margins of pereonites 1–5. Pleonite 1 free from remaining segments of pleotelson; pleotelson dorsal surface bulbous, differentiated from lateral margin by longitudinal groove; pleonites 5 and 6 with middorsal spines, with paired submedian spines or tubercles, with few pairs of sublateral spines, none more prominent than others, with marginal lateral spines, with prominent paired posterior sublateral spines, with prominent medial posterior spine dorsal to margin. Antenna 2 flagellum of 9 or more short articles. Pereopods 2–4 with regular rows of long setae along flexor margins of merus-propodus; unguis short, curved. Pleopod 1 of male exopod groove opening distolaterally on lobe-like apex beset with numerous fine setae. Pleopod 2 of male, appendix masculina elongate, acute, considerably longer than endopod. Oostegites 2–4 unknown. Included species . Marmachius fortunae n. sp. , Antarcturus princeps Kussakin & Vasina, 1998. Etymology . For friend and fellow traveller Michael Marmach, whose carefully prepared 35-mm photographs of crustaceans revealed their hitherto hidden colours and set Museum Victoria on the road to a web presence. Remarks . The new genus shares many features with Antarcturus s.s. Both genera have paired submedian spines on the head, sublateral and lateral (supracoxal) spines on all pereonites and lateral spines on the pleotelson. All are much longer in Marmachius than in any species of Antarcturus . Submedian spines are prominent on all segments in Marmachius but are evident only as tubercles in Antarcturus oryx . Both genera possess posterolateral spines on the pleotelson. ... |
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