Echyridella aucklandica was first described by John Edward Gray in 1843 and given the name Unio aucklandicus.[2] It was described again by American malacologist Charles Torrey Simpson in 1902, who used the name Diplodon websteri.[3] Simpson's original text (the type description) reads as follows:
Diplodon websteri Simpson.
Shell long, rhomboid, compressed or subcompressed, inequilateral; beaks subcompressed, pointed, their sculpture apparently a few irregular lachrymose nodules arranged in a somewhat radial pattern; surface with uneven growth lines and impressed rest marks, sculptured throughout with lachrymose nodules which are often V-shaped, those along the upper part of the low posterior ridge slightly knobbed; epidermis dark olive green, clouded with lighter green, rather dull; pseudo-cardinals small, subcompressed, granulose, two in each valve ; laterals straight, two in the left valve, one in the right; muscle scars small, shallow and irregular; nacre bluish,
lurid purple near and in the beak cavities, thicker in front.
The length of the shell is 62–81 mm. The height of the shell is 32–39 mm. The width of the shell is 14–20 mm.[3][4]
Distributionedit
Echyridella aucklandica is found in two separate locations, Southland and the lower North Island. This broken distribution may have come about due to transportation by Māori.[5] It inhabits lakes and streams.[4]
Ecologyedit
Like other unionids, E. aucklandica has a complex life-cycle characterised by a parasitic larval stage called glochidia that require a fish host to metamorphose into juveniles.[6]Echyridella aucklandica glochidia attach themselves exclusively to the New Zealand smelt, unlike the more common Echyridella menziesii, which generalises to many different host species.[7][6]
Referencesedit
^Grainger, Natasha; Collier, Kevin; Hitchmough, Rod; Harding, Jon; Smith, Brian; Sutherland, Darin (May 2014). Conservation status of New Zealand freshwater invertebrates, 2013(PDF). Wellington, New Zealand: Department of Conservation. p. 15. ISBN9780478150155. Retrieved 24 June 2016.
^ ab"Echyridella aucklandica (J. E. Gray, 1843)". WoRMS. World Register of Marine Species. Retrieved 26 May 2023.
^ abSimpson C. T. (1902) "A new naiad from New Zealand". Nautilus16(3): 30.
^Vennell, Robert (5 October 2022). Secrets of the Sea: The Story of New Zealand's Native Sea Creatures. HarperCollins Publishers Ltd. pp. 38–43. ISBN978-1-77554-179-0. Wikidata Q114871191.
^ abMelchior, Michéle (2021). Partitioning along reproductive niche dimensions in sympatric New Zealand freshwater bivalve species (Thesis thesis). The University of Waikato.
^Melchior, Michele; Squires, Nicole J; Clearwater, Susan J; Collier, Kevin J (2023). "Discovery of a host fish species for the threatened New Zealand freshwater mussel Echyridella aucklandica (Bivalvia: Unionida: Hyriidae)". New Zealand Journal of Marine and Freshwater Research. 57 (1): 152–159. doi:10.1080/00288330.2021.1963290. ISSN 0028-8330.
April 17, 2024
echyridella, aucklandica, species, freshwater, mussel, endemic, zealand, aucklandica, aquatic, bivalve, mollusc, family, unionidae, river, mussels, conservation, status, nationally, vulnerable, scientific, classification, domain, eukaryota, kingdom, animalia, . Echyridella aucklandica is a species of freshwater mussel endemic to New Zealand E aucklandica is an aquatic bivalve mollusc in the family Unionidae the river mussels Echyridella aucklandica Conservation status Nationally Vulnerable NZ TCS 1 Scientific classification Domain Eukaryota Kingdom Animalia Phylum Mollusca Class Bivalvia Order Unionida Family Unionidae Genus Echyridella Species E aucklandica Binomial name Echyridella aucklandica Gray 1843 Synonyms 2 Cucumerunio websteri C T Simpson 1902 Cucumerunio websteri delli McMichael amp Hiscock 1958Diplodon Hyridella menziesi lucasi Suter 1905Diplodon menziesii lucasi Suter 1905Diplodon websteri C T Simpson 1902Echyridella lucasi Suter 1905 Hyridella aucklandica J E Gray 1843 Unio aucklandicus J E Gray 1843 Contents 1 Description 2 Distribution 3 Ecology 4 ReferencesDescription editEchyridella aucklandica was first described by John Edward Gray in 1843 and given the name Unio aucklandicus 2 It was described again by American malacologist Charles Torrey Simpson in 1902 who used the name Diplodon websteri 3 Simpson s original text the type description reads as follows Diplodon websteri Simpson Shell long rhomboid compressed or subcompressed inequilateral beaks subcompressed pointed their sculpture apparently a few irregular lachrymose nodules arranged in a somewhat radial pattern surface with uneven growth lines and impressed rest marks sculptured throughout with lachrymose nodules which are often V shaped those along the upper part of the low posterior ridge slightly knobbed epidermis dark olive green clouded with lighter green rather dull pseudo cardinals small subcompressed granulose two in each valve laterals straight two in the left valve one in the right muscle scars small shallow and irregular nacre bluish lurid purple near and in the beak cavities thicker in front The length of the shell is 62 81 mm The height of the shell is 32 39 mm The width of the shell is 14 20 mm 3 4 Distribution editEchyridella aucklandica is found in two separate locations Southland and the lower North Island This broken distribution may have come about due to transportation by Maori 5 It inhabits lakes and streams 4 Ecology editLike other unionids E aucklandica has a complex life cycle characterised by a parasitic larval stage called glochidia that require a fish host to metamorphose into juveniles 6 Echyridella aucklandica glochidia attach themselves exclusively to the New Zealand smelt unlike the more common Echyridella menziesii which generalises to many different host species 7 6 References edit Grainger Natasha Collier Kevin Hitchmough Rod Harding Jon Smith Brian Sutherland Darin May 2014 Conservation status of New Zealand freshwater invertebrates 2013 PDF Wellington New Zealand Department of Conservation p 15 ISBN 9780478150155 Retrieved 24 June 2016 a b Echyridella aucklandica J E Gray 1843 WoRMS World Register of Marine Species Retrieved 26 May 2023 a b Simpson C T 1902 A new naiad from New Zealand Nautilus 16 3 30 a b Powell A W B New Zealand Mollusca William Collins Publishers Ltd Auckland New Zealand 1979 ISBN 0 00 216906 1 Vennell Robert 5 October 2022 Secrets of the Sea The Story of New Zealand s Native Sea Creatures HarperCollins Publishers Ltd pp 38 43 ISBN 978 1 77554 179 0 Wikidata Q114871191 a b Melchior Michele 2021 Partitioning along reproductive niche dimensions in sympatric New Zealand freshwater bivalve species Thesis thesis The University of Waikato Melchior Michele Squires Nicole J Clearwater Susan J Collier Kevin J 2023 Discovery of a host fish species for the threatened New Zealand freshwater mussel Echyridella aucklandica Bivalvia Unionida Hyriidae New Zealand Journal of Marine and Freshwater Research 57 1 152 159 doi 10 1080 00288330 2021 1963290 ISSN 0028 8330 Retrieved from https en wikipedia org w index php title Echyridella aucklandica amp oldid 1197054261, wikipedia, wiki, book, books, library,
