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Colossendeidae

From Wikipedia, the free encyclopedia

Colossendeidae
Temporal range: Jurassic–present
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Pycnogonida
Order: Pantopoda
Family: Colossendeidae
Jarzynsky, 1870
Genera

Colossendeis
Decolopoda
Dodecolopoda
Hedgpethia
Pentacolossendeis
Rhopalorhynchus

Diversity
6 genera

Colossendeidae is a family of sea spiders (class Pycnogonida).[1] This family includes more than 100 species distributed among six genera.[2] These sea spiders inhabit the deep sea mostly but are also found in shallower waters, especially in Antarctic and Arctic waters.[3]

Description

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Most colossendeids can grow to giant sizes as adults, far larger than any other sea spiders. The largest sea spider, Colossendeis colossea, can reach a leg span of 70 cm.[4] While the subfamily Hedgpethiinae include tiny species with leg span of less than 1 cm.[5] Like most sea spiders, colossendeids usually have four pairs of legs, except for three species (Decolopoda australis, D. qasimi, and Pentacolossendeis reticulata) with five leg pairs,[6][7] and one species (Dodecolopoda mawsoni) with six leg pairs.[8][9]

Colossendeids typically have no chelifores, except in the extra-legged species which have robust pincers and 2-segmented scapes.[8][6] The palps and ovigers are present in both males and females, they are elongated with basal processes located very close to each other. The palps have 8 or 9 segments (historically 9 or 10 as the basal process was once thought to be a segment) while the ovigers have 10 segments.[10] Each oviger ends in a strong terminal claw and compound spines arranged in fields or rows on a well formed strigilis (hook-like distal segments).[11][12] The proboscis is long, usually longer than the body. The body and legs are usually glabrous.[12] The trunk segments are either segmented (Hedgpethiinae) or fused (Colossendeinae). The legs are very long, and the terminal main claws have no auxiliary claws. gonopores represented on some or all legs.[12][11]

Taxonomy

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References

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  1. ^ "PycnoBase - Colossendeidae Jarzynsky, 1870". www.marinespecies.org. Retrieved 2024-08-01.
  2. ^ "ITIS - Report: Colossendeidae". www.itis.gov. Retrieved 2024-08-04.
  3. ^ Dietz, Lars; Dömel, Jana S.; Leese, Florian; Mahon, Andrew R.; Mayer, Christoph (2019). "Phylogenomics of the longitarsal Colossendeidae: The evolutionary history of an Antarctic sea spider radiation". Molecular Phylogenetics and Evolution. 136: 206–214. Bibcode:2019MolPE.136..206D. doi:10.1016/j.ympev.2019.04.017. ISSN 1055-7903. PMID 31002869.
  4. ^ Gardner, C.E.; Bain, B.A.; Govedich, F.R. (2016). "Revision of Colossendeis colossea Wilson, 1881 (Pycnogonida Family Colossendeidae)". The Society for Integrative and Comparative Biology. Retrieved 2024-08-04.
  5. ^ Takahashi, Yoshie; Kajihara, Hiroshi; Mawatari, Shunsuke (2012-03-16). "A new species of Hedgpethia (Arthropoda, Pycnogonida, Colossendeidae) from southwestern Japan". ZooKeys (175): 69–74. Bibcode:2012ZooK..175...69T. doi:10.3897/zookeys.175.2612. ISSN 1313-2970. PMC 3307348. PMID 22451791.
  6. ^ a b Jayasree, V.; Sreepada, R. A.; Parulekar, A. H. (1993). "An unusual giant pycnogonid (Pycnogonida-Colossendeidae) Decolopoda qasimi sp. nov. from Antarctic waters". Current Science. 65 (2): 179–181 – via NIO Digital Repository Service.
  7. ^ Hedgpeth, Joel W. (1947). "The Pycnogonida of the Western North Atlantic and the Caribbean". Proceedings of the United States National Museum. 97 (3216): 157–342 [275]. doi:10.5479/si.00963801.97-3216.157 – via Biodiversity Heritage Library.
  8. ^ a b Calman, William Thomas; Gordon, Isabella (1933-06-01). "A dodecapodous pycnogonid". Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character. 113 (781): 107–115. doi:10.1098/rspb.1933.0034.
  9. ^ Hedgpeth, Joel W. (1947). "On the evolutionary significance of the Pycnogonida". Smithsonian Miscellaneous Collections. 106 (18): 1–53. hdl:10088/22801 – via Smithsonian Research Online.
  10. ^ Cano-Sánchez, Esperanza; López-González, Pablo J. (2016-12-15). "Basal articulation of the palps and ovigers in Antarctic Colossendeis (Pycnogonida; Colossendeidae)". Helgoland Marine Research. 70 (1): 22. doi:10.1186/s10152-016-0474-7. ISSN 1438-3888.
  11. ^ a b Cano-Sánchez, Esperanza; López-González, Pablo J. (2016-12-15). "Basal articulation of the palps and ovigers in Antarctic Colossendeis (Pycnogonida; Colossendeidae)". Helgoland Marine Research. 70 (1): 22. doi:10.1186/s10152-016-0474-7. ISSN 1438-3888.
  12. ^ a b c Staples, David A. (2007-12-31). "A new species of Colossendeis (Pycnogonida: Colossendeidae) together with records from Australian and New Zealand waters". Memoirs of Museum Victoria. 64: 79–94. doi:10.24199/j.mmv.2007.64.8.
  13. ^ "PycnoBase - Colossendeinae Jarzynsky, 1870". www.marinespecies.org. Retrieved 2024-12-05.
  14. ^ "PycnoBase - Hedgpethiinae Pushkin, 1990". www.marinespecies.org. Retrieved 2024-12-05.

Sources

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