About Hirondellea gigas

Hirondellea gigas is a species of amphipod crustacean found in the hadal zone of the Pacific Ocean, particularly in the Mariana Trench. It is adapted to extreme deep-sea environments, living at depths exceeding 10,000 meters where pressures are immense and temperatures are near freezing. This species feeds on organic matter that sinks to the ocean floor, playing a crucial role in the deep-sea ecosystem as a scavenger. Its unique adaptations, such as a lightweight exoskeleton and specialized enzymes, allow it to survive and thrive in one of the most extreme habitats on Earth.

Classification

Animalia (Kingdom); Arthropoda (Phylum); Crustacea (Subphylum); Multicrustacea (Superclass); Malacostraca (Class); Eumalacostraca (Subclass); Peracarida (Superorder); Amphipoda (Order); Amphilochidea (Suborder); Lysianassida (Infraorder); Lysianassidira (Parvorder); Lysianassoidea (Superfamily); Hirondelleidae (Family); Hirondellea (Genus); Hirondellea gigas (Species)

Original Name

Tetronychia gigas Birstein & M. Vinogradov, 1955

Key Reference Paper

1. Birstein J A, Vinogradov M E. Pelagicheskie gammaridy (Amphipoda, Gammaridea) Kurilo-Kamchatskoi Vpadiny[J]. Akademiya Nauk SSSR, Trudy Instituta Okeanologii, 1955, 12: 219-257. (Birstein et al., 1955)

Distribution

Philippine Trench from Philippine Sea, Mariana Trench from North Pacific Ocean and Kuril-Kamchatka Trench


Basic Information
SpeciesPhylumCommon NameEcosystemDepthHabitatNCBI Taxonomy ID
Hirondellea gigasArthropoda-Deep sea6,800-11,000Mariana Trench in the northwestern Pacific Ocean1518452

Genome Assembly Information
Genome AssemblyGenome SizeAssembly levelReleased yearWGS accessionSubmitterBioProjectBUSCO completeness (%)Scaffold/Contig N50 (kb)GC content (%)Repeat Rate (%)Gene Number
-13.92GbChromosome2025CNA0142381-CNP000537489.34 458,700/466.138.872.7527,881

References
TitleJournalPubmed ID
The amphipod genome reveals population dynamics and adaptations to hadal environmentCell40054448

Gene Information

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Gene IDDescription
Hgig_02016GALACTOSE-3-O-SULFOTRANSFERASE
Hgig_02017-
Hgig_02018-
Hgig_02019-
Hgig_02020UBIQUITIN-ACTIVATING ENZYME E1
Hgig_02021RAW, ISOFORM A
Hgig_02022NEUROPEPTIDE Y RECEPTOR
Hgig_02023RAW, ISOFORM A
Hgig_02024-
Hgig_02025-
Hgig_02026-
Hgig_02027TRANSCRIPTIONAL REPRESSOR CTCFL-RELATED
Hgig_02028REVERSE TRANSCRIPTASES
Hgig_02029ATP-DEPENDENT RNA HELICASE
Hgig_02030ATP-DEPENDENT RNA HELICASE
Hgig_02031UFM1-SPECIFIC PROTEASE 2
Hgig_02032REVERSE TRANSCRIPTASE DOMAIN-CONTAINING PROTEIN
Hgig_02033-
Hgig_02034JNK/SAPK-ASSOCIATED PROTEIN
Hgig_02035ORIGIN RECOGNITION COMPLEX SUBUNIT 5
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