{"data":{"Sivorthis":{"Phylum":"Brachiopoda","Subphylum":"Rhynchonelliformea","Class":"Rhynchonellata","Subclass":"None","Order":"Orthida","Suborder":"Orthidina","Infraorder":"None","Superfamily":"Orthoidea","Family":"Orthidae","Subfamily":"None","Genus":"Sivorthis","Formal_genus_name_and_reference":"Sivorthis Jaanusson & BASSETT, 1993, p. 45","Type_species":"S. filistera, OD","Synonyms_with_authors":null,"Synonyms":null,"Distinguishing_characteristics":"Costellate and capillate with strong fila, long ventral interarea, ventral muscle scar subcordate with shallow median groove, brachiophores short, quadripartite adductor scar with larger posterior pair, ventral vascula media parallel proximally.","Beginning_age":"Lower Ordovician (Llanvirn","First_Occurrence":"Llanvirn","Ending_age":"Upper Ordovician (Caradoc)","Last_Occurrence":"Caradoc","Geological_periods":"Lower Ordovician (Llanvirn), Upper Ordovician (Caradoc)","Geography":"North America, Europe","Figure_captions":"Fig. 525, 1a-g. *S. filistera, Caradoc, Sweden, a-c, dorsal, ventral, lateral views of conjoined valves, X3, d, details of ornament, x8_mathbf8, e, ventral interior, X3, f, g, dorsal interior, exterior, X3 (Jaanusson & Bassett, 1993).","Museum_or_author_information":"Jaanusson & Bassett, 1993","figure_index":"fig. 525. orthidae (p. 727).","figure_link":"![] (https:\/\/cdn.mathpix.com\/cropped\/2025_02_26_b7a0ad81814c0d2102a9g-760.jpg?height=1295&width=1287&top_left_y=148&top_left_x=165)","beginning_stage":"Dapingian","fraction_up_beginning_stage":0,"beginning_date":471.26,"ending_stage":"Katian","fraction_up_ending_stage":66.7,"ending_date":447.72,"geojson":"Unkown","region":"Unkown","sub-region":"Unkown","province":"Unkown","sub_province":"Unkown"}},"isSynonym":false}