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On the molecular and morphological evolution of continental and insular Cryptorchestia species, with an additional description of C.garbinii (Talitridae).

  • Davolos, Domenico1, 2
  • Matthaeis, Elvira De2
  • Latella, Leonardo3
  • Tarocco, Marco3
  • Özbek, Murat4
  • Vonk, Ronald5, 6
  • 1 INAIL, Research, Certification, Verification Area, Department of Technological Innovations and Safety of Plants, Products and Anthropic Settlements (DIT), Rome, Italy Department of Technological Innovations and Safety of Plants, Products and Anthropic Settlements (DIT) Rome Italy. , (Italy)
  • 2 Department of Biology and Biotechnology 'Charles Darwin', Sapienza University of Rome, Viale dell'Università, 32, - 00185 Rome, Italy Sapienza University of Rome Rome Italy. , (Italy)
  • 3 Museo Civico di Storia Naturale of Verona, Lungadige Porta Vittoria 9 - 37129, Verona, Italy Museo Civico di Storia Naturale of Verona Verona Italy. , (Italy)
  • 4 Ege University, Faculty of Fisheries, 35100 Bornova-Izmir, Turkey Ege University Bornova-Izmir Turkey. , (Turkey)
  • 5 Naturalis Biodiversity Center, P.O. Box 9517, 2300 RA Leiden, The Netherlands Naturalis Biodiversity Center Leiden Netherlands. , (Netherlands)
  • 6 Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Science Park 904, Amsterdam 1098 XH, The Netherlands University of Amsterdam Amsterdam Netherlands. , (Netherlands)
Published Article
Pensoft Publishers
Publication Date
Jan 01, 2018
DOI: 10.3897/zookeys.783.26179
PMID: 30275725


Semi-terrestrial talitrid amphipods of the genus Cryptorchestia (sensu Lowry and Fanini 2013) associated with freshwater-soaked leaf litter were known to occur in inland lakes of Turkey and at the shores of the Black Sea. Before 2013 they had been reported as Orchestiacavimana and later as Cryptorchestiacavimana. In our phylogenetic tree, inferred from a mitochondrial and nuclear gene dataset (cytochrome oxidase I (COI), and histone H3 (H3), respectively), we show that these Turkish populations belong to Cryptochestiagarbinii, a common and widespread continental species, which is closely related to C.cavimana (endemic to Cyprus) and C.ruffoi (endemic to Rhodes). For the Turkish and European populations of C.garbinii, we found low levels of both genetic differentiation and morphological variation, and an age-related size variability (increasing at each moult) of the small lobe in the male gnathopod I merus, the main taxonomically diagnostic character for Cryptorchestia. A mainland (C.garbinii) versus insular isolation and in situ speciation (C.cavimana, and C.ruffoi) in the two east Mediterranean islands of Cyprus and Rhodes is discussed in relation to terrestrial Cryptorchestia species endemic to North East Atlantic volcanic islands (Azores, Canary Islands, and Madeira). The incorporation of five Mediterranean and Atlantic Orchestia species in the Bayesian analysis of the two genes (COI, and H3) indicated that both genera Orchestia and Cryptorchestia are not monophyletic.

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