Latest Articles from ZooKeys Latest 3 Articles from ZooKeys https://zookeys.pensoft.net/ Fri, 29 Mar 2024 10:55:01 +0200 Pensoft FeedCreator https://zookeys.pensoft.net/i/logo.jpg Latest Articles from ZooKeys https://zookeys.pensoft.net/ Thailandorchestia rhizophila sp. nov., a new genus and species of driftwood hopper (Crustacea, Amphipoda, Protorchestiidae) from Thailand https://zookeys.pensoft.net/article/82949/ ZooKeys 1099: 139-153

DOI: 10.3897/zookeys.1099.82949

Authors: Koraon Wongkamhaeng, Pongrat Dumrongrojwattana, Ratchaneewarn Sumitrakij, Tosaphol Saetung Keetapithchayakul

Abstract: During a scientific survey, a new genus of driftwood hopper was found in mangrove roots in Ko Kut District, Trat Province, Thailand. We placed this new genus, Thailandorchestia gen. nov., within the family Protorchestiidae. The new genus can be distinguished from the remaining genera by uropod 1 outer ramus with robust setae, uropod 2 outer ramus without robust setae, and pereopod 7 basis without a posterodistal lobe. The type species of Thailandorchestia gen. nov., Thailandorchestia rhizophila sp. nov., is described herein, and an updated key to the genera of the family Protorchestiidae is provided.

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Research Article Wed, 4 May 2022 15:23:04 +0300
On the molecular and morphological evolution of continental and insular Cryptorchestia species, with an additional description of C. garbinii (Talitridae) https://zookeys.pensoft.net/article/26179/ ZooKeys 783: 37-54

DOI: 10.3897/zookeys.783.26179

Authors: Domenico Davolos, Elvira De Matthaeis, Leonardo Latella, Marco Tarocco, Murat Özbek, Ronald Vonk

Abstract: 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 Orchestia cavimana and later as Cryptorchestia cavimana. 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 Cryptochestia garbinii, 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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Research Article Mon, 3 Sep 2018 01:30:48 +0300
Cryptorchestia ruffoi sp. n. from the island of Rhodes (Greece), revealed by morphological and phylogenetic analysis (Crustacea, Amphipoda, Talitridae) https://zookeys.pensoft.net/article/11252/ ZooKeys 652: 37-54

DOI: 10.3897/zookeys.652.11252

Authors: Domenico Davolos, Elvira De Matthaeis, Leonardo Latella, Ronald Vonk

Abstract: A new Cryptorchestia species, Cryptorchestia ruffoi Latella & Vonk, sp. n. from the island of Rhodes in south-eastern Greece, can be distinguished on the basis of morphological and phylogenetic data. Morphological analysis and DNA sequencing of mitochondrial and nuclear protein-coding genes indicated that this species is related to C. cavimana (Cyprus) and C. garbinii (Mediterranean regions, with a recent northward expansion). Results supported a genetic separation between the Cryptorchestia species of the east Mediterranean regions and those of the northeast Atlantic volcanic islands examined in this study (C. canariensis, C. gomeri, C. guancha, and C. stocki from the Canary islands, C. monticola from Madeira, and C. chevreuxi from the Azores). The Mediterranean and Atlantic Cryptorchestia species appear to be also morphologically distinct. Cryptorchestia ruffoi sp. n., C. cavimana, C. garbinii, and C. kosswigi (Turkish coast) clearly have a small lobe on the male gnathopod 1 merus. This character was the main diagnostic difference between Cryptorchestia (sensu Lowry, 2013) and Orchestia. However, among the six northeast Atlantic island Cryptorchestia species only C. stocki has a small lobe on the merus of gnathopod 1. Reduction or loss of the lobe in the Atlantic Island species cannot be ruled out; however, molecular phylogenetic analysis leads us to presume that this lobe independently evolved between the east Mediterranean Cryptorchestia species and C. stocki from Gran Canaria.

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Research Article Mon, 6 Feb 2017 20:16:10 +0200