triquetra


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triquetra

An ornament composed of three half circles or ellipses crossed and joined together at their ends.
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References in periodicals archive ?
Hosts of salamander mussel (Simpsonaias ambigua) and snuffbox (Epioblasma triquetra) from the Meramec River system, Missouri.
Meesia triquetra (Jolycl.) Angstrom, Sphagnum centrale Jensen, Dicranum viride (Sull.
Through research I realised Knox used a lot of celtic knot work in his designs and one symbol which kept popping up was the triquetra, three interlinking arms which can either mean father, son and holy ghost or past, present and future.
torulosa -- -- X -- (Rafinesque, 1820) Epioblasma triquetra X -- X -- (Rafinesque, 1820) Fusconaia flava X X X X Glebula rotundata (Lamarck, -- -- X -- 1819) Lampsilis cardium X -- X -- Lampsilis fasciola Rafinesque, X -- X -- 1820 Lampsilis higginsii (Lea, 1857) -- -- X -- Lampsilis ovata (Say, 1817) X X -- -- Lampsilis siliquoidea X -- X -- Lampsilis teres X X X -- Lasmigona c.
90-98) is a simple triquetra, a motif found on some Assyrian royal seals perhaps associated with the queen.
(1994; 1997a, b) did not confirm the presence of cavities in all individuals of the tribe, restricting its occurrence to the genus Sechium and to the species Sechiopsis triquetra (Ser.) Naudin.
The charophyte association, which includes oogonia attributed to Atopochara trivolvis triquetra (Grambast, 1968), dates the locality of La Cantalera as late Hauterivian-early Barremian in age (Triquetra subzone), and, by approximation, the rest of the lower part of the Blesa Formation (Soria et al, 1995; Canudo et al., 2002a; Aurell et al., 2004).
triquetra is ovate to elliptical, inflated in the locular area, but the distal part of each carpel drawn into a membranous or chartaceous wing with radiating irregular reticulate venation and a thin fimbrial vein.
Overall, relative density has decreased for every species except Elliptio dilatata, Epioblasma triquetra, Fusconaia flava and Villosa iris.
(2006) reported unpublished data showing 56.3% mortality from mantle biopsy of Epioblasma triquetra (Rafinesque, 1820), and developed a nonlethal approach of brush swabbing the foot and viscera of Quadrula pustulosa (I.
Biomass variables of Oscillatoriales (mainly from the genera Pseudanabaena and Planktolyngbya, summed up), Anabaena spp., Aphanizomenon sp., Nodularia spumigena Mertens, Hemiselmis virescens Droop, Plagioselmis prolonga Butcher, Prorocentrum minimum Schiller, Heterocapsa triquetra Stein, Cyclotella choctawhatcheeana Prasad, Skeletonema costatum Greville, Cylindrotheca closterium Reimann and J.