Hapsidophyllas is a rare Ediacaranrangeomorph fossil found at Mistaken Point, Newfoundland, Canada. It was first identified by Emily Bamforth and Guy Narbonne in 2009. Its name comes from the Greek words for “a network of leaves.” Because its characteristic flexible leaflet structure is dissimilar to other known rangeomorphs, Bamforth and Narbonne describe it as a new rangeomorph form, called hapsidophyllid. The only other known hapsidophyllid is the Ediacaran frond Frondophyllas grandis, which shares the network-like configuration of leaflets seen in Hapsidophyllas. Currently, the Hapsidophyllas flexibilis holotype resides in its type locality in the Mistaken Point Ecological Reserve, and a cast of the specimen is on display at the Royal Ontario Museum in Toronto, Canada.[1][2]
The Hapsidophyllas flexibilis holotype is 110 mm long and 4 mm wide. It is composed of multibranched leaflets radiating from a single elongate basal rod. The leaflets gradually taper toward their distal ends and overlap one another. This leaf shape points towards a suspension feeding behavior.[1] The overlapping branches of Hapsidophyllas are architecturally similar to the renowned Ediacaran frond Charnia.[1] However, a significant difference between the two is that the primary branches of Charnia are connected to a central tube that is absent or internal, while hapsidophyllid leaflets are attached to a visible stalk.[3]
Sedimentary studies show that Mistaken Point organisms, including Hapsidophyllas, lived on the deep seafloor below the photic zone.[4] Because Mistaken Point organisms were preserved under deposit layers of volcanic ash, their proximity to the seafloor can be estimated based on the quality of their preservation. Due to its excellent preservation, it is estimated that the Hapsidophyllas flexibilis laid semi-prone to the seafloor in its life.[1]
Referencesedit
^ abcdBamforth, Emily L.; Narbonne, Guy M. (2009). "New Ediacaran Rangeomorphs from Mistaken Point, Newfoundland, Canada". Journal of Paleontology. 83 (6): 897–913. doi:10.1666/09-047.1. ISSN 0022-3360. JSTOR 20627674. S2CID 86227242.
^Taylor, Rod S.; Matthews, Jack J.; Nicholls, Robert; Mcllroy, Duncan (2021). "A re-assessment of the taxonomy, palaeobiology and taphonomy of the rangeomorph organism Hapsidophyllas flexibilis from the Ediacaran of Newfoundland, Canada". Paläontologische Zeitschrift. 95 (2): 187–207. Bibcode:2021PalZ...95..187T. doi:10.1007/s12542-020-00537-4. S2CID 232377991.
^Brasier, Martin D.; Antcliffe, Jonathan B. (2009-03-01). "Evolutionary relationships within the Avalonian Ediacara biota: new insights from laser analysis". Journal of the Geological Society. 166 (2): 363–384. Bibcode:2009JGSoc.166..363B. doi:10.1144/0016-76492008-011. ISSN 0016-7649. S2CID 128827652.
^Narbonne, Guy M. (2005-05-31). "THE EDIACARA BIOTA: Neoproterozoic Origin of Animals and Their Ecosystems". Annual Review of Earth and Planetary Sciences. 33 (1): 421–442. Bibcode:2005AREPS..33..421N. doi:10.1146/annurev.earth.33.092203.122519. ISSN 0084-6597.
April 10, 2024
hapsidophyllas, rare, ediacaran, rangeomorph, fossil, found, mistaken, point, newfoundland, canada, first, identified, emily, bamforth, narbonne, 2009, name, comes, from, greek, words, network, leaves, because, characteristic, flexible, leaflet, structure, dis. Hapsidophyllas is a rare Ediacaran rangeomorph fossil found at Mistaken Point Newfoundland Canada It was first identified by Emily Bamforth and Guy Narbonne in 2009 Its name comes from the Greek words for a network of leaves Because its characteristic flexible leaflet structure is dissimilar to other known rangeomorphs Bamforth and Narbonne describe it as a new rangeomorph form called hapsidophyllid The only other known hapsidophyllid is the Ediacaran frond Frondophyllas grandis which shares the network like configuration of leaflets seen in Hapsidophyllas Currently the Hapsidophyllas flexibilis holotype resides in its type locality in the Mistaken Point Ecological Reserve and a cast of the specimen is on display at the Royal Ontario Museum in Toronto Canada 1 2 HapsidophyllasTemporal range 579 565 Ma PreꞒ Ꞓ O S D C P T J K Pg N EdiacaranPaleoart by Max Endieveri modeled after Bamforth amp NarbonneScientific classificationDomain EukaryotaKingdom AnimaliaPhylum PetalonamaeGenus HapsidophyllasBamforth and Narbonne 2009Species H flexibilisBinomial name Hapsidophyllas flexibilisBamforth and Narbonne 2009The Hapsidophyllas flexibilis holotype is 110 mm long and 4 mm wide It is composed of multibranched leaflets radiating from a single elongate basal rod The leaflets gradually taper toward their distal ends and overlap one another This leaf shape points towards a suspension feeding behavior 1 The overlapping branches of Hapsidophyllas are architecturally similar to the renowned Ediacaran frond Charnia 1 However a significant difference between the two is that the primary branches of Charnia are connected to a central tube that is absent or internal while hapsidophyllid leaflets are attached to a visible stalk 3 Sedimentary studies show that Mistaken Point organisms including Hapsidophyllas lived on the deep seafloor below the photic zone 4 Because Mistaken Point organisms were preserved under deposit layers of volcanic ash their proximity to the seafloor can be estimated based on the quality of their preservation Due to its excellent preservation it is estimated that the Hapsidophyllas flexibilis laid semi prone to the seafloor in its life 1 References edit a b c d Bamforth Emily L Narbonne Guy M 2009 New Ediacaran Rangeomorphs from Mistaken Point Newfoundland Canada Journal of Paleontology 83 6 897 913 doi 10 1666 09 047 1 ISSN 0022 3360 JSTOR 20627674 S2CID 86227242 Taylor Rod S Matthews Jack J Nicholls Robert Mcllroy Duncan 2021 A re assessment of the taxonomy palaeobiology and taphonomy of the rangeomorph organism Hapsidophyllas flexibilis from the Ediacaran of Newfoundland Canada Palaontologische Zeitschrift 95 2 187 207 Bibcode 2021PalZ 95 187T doi 10 1007 s12542 020 00537 4 S2CID 232377991 Brasier Martin D Antcliffe Jonathan B 2009 03 01 Evolutionary relationships within the Avalonian Ediacara biota new insights from laser analysis Journal of the Geological Society 166 2 363 384 Bibcode 2009JGSoc 166 363B doi 10 1144 0016 76492008 011 ISSN 0016 7649 S2CID 128827652 Narbonne Guy M 2005 05 31 THE EDIACARA BIOTA Neoproterozoic Origin of Animals and Their Ecosystems Annual Review of Earth and Planetary Sciences 33 1 421 442 Bibcode 2005AREPS 33 421N doi 10 1146 annurev earth 33 092203 122519 ISSN 0084 6597 Retrieved from https en wikipedia org w index php title Hapsidophyllas amp oldid 1207526307, wikipedia, wiki, book, books, library,
