The deep-sea blind lobster A. Milne-Edwards, 1880 was collected at a water depth of 3433 m and is reported for the first time from the Central Indian Ridge (CIR). The species was identified based on morphological examination and supported by mitochondrial Cytochrome Oxidase Subunit I (mtCOI) gene. The phylogenetic analysis shows that is sister species of . Our findings expand the distributional range of the specimen in the southern hemisphere.
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http://dx.doi.org/10.1080/23802359.2020.1721345 | DOI Listing |
Comp Biochem Physiol A Mol Integr Physiol
January 2025
Departamento de Biología, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Puerto Real (Cádiz), Spain; Instituto Universitario de Investigación Marina (INMAR) and Campus de Excelencia Internacional del Mar (CEIMAR), Puerto Real (Cádiz), Spain; The European University of the Seas (SEA-EU), Cádiz, Spain. Electronic address:
Most organisms possess endogenous circadian clocks that synchronise their physiology and behaviour with environmental cycles, with the light-dark (LD) cycle being the most potent synchronising signal. Consequently, it can be hypothesised that animals that have evolved in the dark, as in caves or deep sea, may no longer possess a functional light-entrained biological clock. In this research, the blind cavefish Astyanax mexicanus was selected as a model organism to investigate the potential effects of daily light conditions on the circadian timekeeping mechanisms.
View Article and Find Full Text PDFJ Fish Biol
October 2024
Centro Oceanográfico de Cádiz, Instituto Español de Oceanografía, Consejo Superior de Investigaciones Científicas, Cádiz, Spain.
Barathronus is a genus of blind cusk eels comprising 11 valid species. In this paper, we report the second specimen ever documented of Barathronus roulei (Bythitidae) obtained from the Porcupine Bank by R.V.
View Article and Find Full Text PDFIntegr Comp Biol
July 2024
Program in Biomedical Science and Engineering, Inha University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Republic of Korea.
Limitations on energetic resources create evolutionary trade-offs, prompting us to investigate if investment in claw strength remains consistent across crustaceans living in diverse habitats. Decapod crustaceans living in deep-sea hydrothermal vents are ideal for this study due to their extreme environment. In this study, we investigated whether decapods (blind crab Austinograea sp.
View Article and Find Full Text PDFMol Phylogenet Evol
March 2024
Simon F. S. Li Marine Science Laboratory, School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong, China. Electronic address:
A comprehensive molecular analysis of the deep-sea blind lobsters of the family Polychelidae, often referred to as "living fossils", is conducted based on all six modern genera and 27 of the 38 extant species. Using six genetic markers from both mitochondrial and nuclear genomes, the molecular phylogenetic results differ considerably from previous morphological analyses and reveal the genera Polycheles and Pentacheles to be para- or polyphyletic. As the splitting of Polycheles has strong support from both molecular and morphological data, two new genera, Dianecheles and Neopolycheles, are erected for those species excluded from the clade containing the type species of Polycheles.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
March 2023
Laboratory for Phyloinformatics, RIKEN Center for Biosystems Dynamics Research, Kobe 650-0047, Japan.
Spectral tuning of visual pigments often facilitates adaptation to new environments, and it is intriguing to study the visual ecology of pelagic sharks with secondarily expanded habitats. The whale shark, which dives into the deep sea of nearly 2,000 meters besides near-surface filter feeding, was previously shown to possess the 'blue-shifted' rhodopsin (RHO), which is a signature of deep-sea adaptation. In this study, our spectroscopy of recombinant whale shark RHO mutants revealed that this blue shift is caused dominantly by an unprecedented spectral tuning site 94.
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