Eurycercus nigracanthus

• Main Authors: Bekker, Eugeniya I., Kotov, Alexey A.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2016
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Branchiopoda; Diplostraca; Eurycercidae; Eurycercus; Eurycercus nigracanthus; Arctic; Churchill; Tundra
• Online Access: https://doi.org/10.5281/zenodo.5631053; http://treatment.plazi.org/id/03CD879F9C39FF8856A32CAAE622FDD6

Eurycercus cf. nigracanthus from Churchil (Figs 6–8) Material examined. All from Manitoba, Canada: 8 parthenogenetic ♀♀ from Pond X, Churchill, coll. in 15.08.2006, AAK M-2773. 2 parthenogenetic ♀♀ from TP-1, tundra pond, Churchill, coll. in 0 8.2006, AAK M- 2772. 2 parthenogenetic ♀♀ from TP-3, tundra pond, Churchill, coll. in 0 8.2006, AAK M-2771. Comments. Using genetic barcoding, Jeffrey et al . (2011) detected two species of Eurycercus in Churchill vicinities: Eurycercus longirostris and E. cf. longirostris . Subsequent COI -based study (Bekker et al . 2012) revealed that the latter was identified wrongly and in reality belongs to an undescribed species of E. ( Teretifrons ), different from both E. glacialis and E. nigracanthus , and grouped with a good statistical support with the former against the latter. Dr M. Elías-Gutiérrez, one of authors of the paper recorded above (Jeffrey et al . 2011), kindly provided us with a material on the aforementioned wrongly identified taxon. But our morphologic study led to conclusion that these populations could be identified as E. nigracanthus . Different hypotheses could be proposed to explain such controversy: (1) in reality, E. nigracanthus is present in Churchill region, it was missed by Jeffrey et al (2011), and only these specimens were sent to us; (2) our " E. nigracanthus " is in reality a specific undescribed species which could not be diagnosed based on morphological characters; (3) both Jeffrey et al . (2011) and us dealt with a hybrid population of E. nigracanthus x undescribed species which has a nigracanthus -like morphology, but a non- nigracanthus mitochondrial genome. This problem needs further investigation. Published as part of Bekker, Eugeniya I. & Kotov, Alexey A., 2016, A revision of the subgenus Eurycercus (Teretifrons) Frey, 1975 (Crustacea: Cladocera) in the Holarctic with description of a new species from Russian Arctic, pp. 351-376 in Zootaxa 4147 (4) on page 360, DOI:10.11646/zootaxa.4147.4.1, http://zenodo.org/record/267823