Schizocuma spinoculatum
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Ordo: Cumacea
Familia: Nannastacidae
Genus: Schizocuma
Name
Schizocuma spinoculatum (Jones, 1984) – Wikispecies link – Pensoft Profile
- Cumella spinoculata – Jones 1984[1], pp. 219–220, fig. 10.
- Schizocuma spinoculatum – Watling 1991[2], p. 755.
Material examined
Schizocuma spinoculatum: ESSAIS II, stn TS13, 44°34.19'N, 2°16.18'W, 1097–1099 m, 17/05/89, 7 pread. females, 2 imm. males, 1 ad. male.
Schizocuma molosa (Zimmer, 1907): BENTART 06; stn 30, 69°58'24"S, 87°26'54"W, 1798–1799 m, 27/01/2006, 1 ad. male, 1 imm; stn 31, 69°57'46"S, 87°22'08"W, 1395 m, 29/01/2006, 2 imm. females, 1 ad. male; stn 38, 69°15'11"S, 80°12'11"W, 1339–1343 m, 5/02/2006, 1 imm. female.
Remarks
When Jones (1984)[1] described Schizocuma spinoculatum, he had already noted its strong resemblance to Schizocuma molosa, but then the latter species was only known by a single partially broken specimen (Zimmer 1907[3], 1913[4]). Comparison of the material collected in the Bay of Biscay with those obtained during the Bentart 06 cruise in the Bellingshausen Sea (Corbera et al. 2009[5]) enabled us to identify differences between the two species. On the tip of pseudorostrum of Schizocuma molosa there are a couple of spines (Fig. 5C), one on the upper angle and another just bellow the siphon; the first one is absent in Schizocuma spinoculatum (Fig. 5A). The hinder dorsal third of the carapace of Schizocuma molosa also has a pair of forward curving spines and long simple setae while Schizocuma spinoculatum has only a pair of simple setae. Moreover, the carapace is more elongated in Schizocuma molosa than in Schizocuma spinoculata (length-height ratio: 1.8 vs 1.5), which is also true of the uropod peduncle (peduncle-endopod length ratio: 1.8–1.9 vs 1.5) (Fig. 5B, D). All of these differences can be observed both in males and in females, which gives support to the validity of both species.
Taxon Treatment
- Corbera, J; 2012: Rare and new cumaceans (Crustacea, Peracarida) from the southern margin of the Cap Ferret Canyon (Bay of Biscay) ZooKeys, 235: 73-85. doi
Other References
- ↑ 1.0 1.1 Jones N (1984) The family Nannastacidae (Crustacea: Cumacea) from the deep Atlantic. Bulletin of the British Museum (Natural History), Zoology 46: 207-289.
- ↑ Watling L (1991) Rediagnosis and revision of some Nannastacidae (Crustacea: Cumacea). Proceedings of the Biological Society of Washington 104 (4): 751-757.
- ↑ Zimmer C (1907) Neue Cumacenn von der Deutschen und Schwedischen Südpolar-Expedition aus Familien der Cumiden, Vaunthompsoniiden, Nannastaciden und Lampropiden. Zoologischer Anzeiger 31: 367-374.
- ↑ Zimmer C (1913) Die Cumaceen der Deutchen Südpolar-Expedition 1901–03. Deutsche Südpolar-Expedition (1901–1903) 14(6): 437–491.
- ↑ Corbera J, San Vicente C, Sorbe J (2009) Cumaceans (Crustacea) from the Bellingshausen Sea and off the western Antarctic Peninsula: a deep-water link with fauna of the surrounding oceans. Polar Biology 32 (4): 611-622. doi: 10.1007/s00300-008-0561-6
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