About Bathynomus jamesi

Bathynomus jamesi is widely distributed across different environments including the deep-sea and as such are a useful model for studying adaptation, migration, and speciation. They have larger body size than their shallow water relatives and have large stomachs and fat bodies presumably to store organic reserves. To adapt to the benthic environment, they adopt a burrowing behavior . They have developed an oversized stomach, which can take approximately 2/3 of the whole body cavity when it fills up with food. In addition, they are well known for their extremely long fasting state, which should be the longest record to date. Larger animals usually have greater absolute energy requirements.

Classification

Animalia (Kingdom); Arthropoda (Phylum); Crustacea (Subphylum); Multicrustacea (Superclass); Malacostraca (Class); Eumalacostraca (Subclass); Peracarida (Superorder); Isopoda (Order); Cymothoida (Suborder); Cymothooidea (Superfamily); Cirolanidae (Family); Bathynomus (Genus); Bathynomus jamesi (Species)

Original Name

Bathynomus jamesi Kou, Chen & Li in Kou, Q., Chen, J., Li, X., He, L. & Wang, Y., 2017

Key Reference Paper

1. Kou Q, Chen J, Li X, et al. New species of the giant deep‐sea isopod genus Bathynomus (Crustacea, Isopoda, Cirolanidae) from Hainan Island, South China Sea[J]. Integrative zoology, 2017, 12(4): 283-291. (Kou et al., 2017)
2. Huang M C, Kawai T, Bruce N L. A new species of Bathynomus Milne-Edwards, 1879 (Isopoda: Cirolanidae) from the southern Gulf of Mexico with a redescription of Bathynomus jamesi Kou, Chen and Li, 2017 from off Pratas Island, Taiwan[J]. Journal of Natural History, 2022, 56(13-16): 885-921. (Huang et al., 2022)

Description

Holotype, 1 immature female (to-tal length [TL] 114 mm). Pleotelson with 11 or 13 short, straightspines; central spine not bifid. Uropod with endopodand exopod distolateral corner slightly produced. Cly-peus lateral margins concave, narrowly rounded apical-ly. Antennal flagellum extending to within pereonite 3. Body suboval, total length(114 mm) approximately 2.2 times as long as maximalwidth (53 mm)

Etymology

The species is named after Dr James K.Lowry in recognition of his great contribution to thecrustacean taxonomy

Distribution

Gulf of Aden, north-western IndianOcean and northern South China Sea, western PacificOcean at a depth of 563–898 m


Basic Information
SpeciesPhylumCommon NameEcosystemDepthHabitatNCBI Taxonomy ID
Bathynomus jamesiArthropoda-Hydrothermal vent898near Hainan Island, in the northern South China Sea (17° 46.845′ N, 110° 38.217′ E)1955234

Genome Assembly Information
Genome AssemblyGenome SizeAssembly levelReleased yearWGS accessionSubmitterBioProjectBUSCO completeness (%)Scaffold/Contig N50 (kb)GC content (%)Repeat Rate (%)Gene Number
ASM2301448v15.89GbContig2022JAJOZX01Institute of Oceanology, Chinese Academy of SciencesPRJNA77607694.80 586.537.2885.3223,221

References
TitleJournalPubmed ID
Genome of a giant isopod, Bathynomus jamesi, provides insights into body size evolution and adaptation to deep-sea environmentBMC Biology35562825

Gene Information

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Gene IDDescription
mRNA.BJAM.scaffold7284.19100-
mRNA.BJAM.scaffold7284.19101-
mRNA.BJAM.scaffold7284.19102-
mRNA.BJAM.scaffold7285.19103INOSITOL POLYPHOSPHATE KINASE
mRNA.BJAM.scaffold7287.19104-
mRNA.BJAM.scaffold7287.19105DEFECTIVE PROBOSCIS EXTENSION RESPONSE DPR -RELATED
mRNA.BJAM.scaffold7289.19106-
mRNA.BJAM.scaffold729.4872MRNA EXPORT FACTOR AND BUB3
mRNA.BJAM.scaffold729.4873SHORT-CHAIN DEHYDROGENASE/REDUCTASE
mRNA.BJAM.scaffold729.4874HL07962P-RELATED
mRNA.BJAM.scaffold729.487526S PROTEASOME NON-ATPASE REGULATORY SUBUNIT 11/COP9 SIGNALOSOME COMPLEX SUBUNIT 2
mRNA.BJAM.scaffold729.4876TRANSMEMBRANE PROTEASE SERINE
mRNA.BJAM.scaffold729.4877CYTOCHROME P450 FAMILY 4
mRNA.BJAM.scaffold729.4878-
mRNA.BJAM.scaffold729.4879-
mRNA.BJAM.scaffold729.4880SERINE/THREONINE-PROTEIN KINASE WNK WITH NO LYSINE -RELATED
mRNA.BJAM.scaffold729.4881SHORT COILED COIL PROTEIN
mRNA.BJAM.scaffold7290.19107DNA2/NAM7 HELICASE FAMILY
mRNA.BJAM.scaffold7290.19108-
mRNA.BJAM.scaffold7290.19109-
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