Peronopsis
Peronopsis is a genus of trilobite restricted to the Middle Cambrian. Its remains have been found in Asia, Australia, Europe, and North America.
Etymology
The subgenus Svenax is a contraction of Sven Axel, the given names of the paleontologist Tullberg.Taxonomy
Position of ''Peronopsis palmadon''
Peronopsis palmadon is intermediate between Peronopsidae and Condylopygidae, but it is not clear whether P. palmadon is ancestral to the Condylopigidae, a condylopigid exhibiting regression towards ancestral characters, or an example of parallel evolution.Species previously assigned to ''Peronopsis''
P. acadica = Acadagnostus acadicusP. bifidus = Pseudoperonopsis bifidusP. bonnerensis = Pentagnostus (Meragostus) bonnerensisP. brunfloensis = Redeagnostus brunfloensisP. bulkurensis = Pentagnostus (Meragostus) bulkurensisP. columbensis = Pseudoperonopsis columbensisP. comes Resser and Erdo, 1937 = Ammagnostus laiwuensisP. comis Öpik, 1979 = Euagnostus comisP. crassa = Ammagnostus crassaP. cylindrica = Quadragnostus cylindricaP. cylindrata = Ammagnostus laiwuensisP. ekip = Ammagnostus laiwuensisP. evansi = Archaeagnostus evansiP. fallax conica = Quadragnostus conicaP. fallax depressa = Quadragnostus depressaP. fallax sinopsis = Redeagnostus ferox sinopsisP. fallax xiaoshiwanensis = indetermined AgnostidaeP. gaspensis = Itagnostus gaspensisP. grossus = Ammagnostus laiwuensisP. gullini = Ammagnostus laiwuensisP. huzhuensis = indetermined AgnostidaeP. interstricta = Itagnostus interstrictusP. jegorovae = Ammagnostus jegorovaeP. lata = Diplorrhina lataP. marginalis = Baltagnostus marginalisP. maijangensis = Archaeagnostus maijangensisP. miqueli = Baltagnostus miqueliP. munda = Trilobagnostus mundaP. quadrata sulcata = Quadragnostus sulcataP. quadratiformis = Ammagnostus laiwuensisP. recta = Diplorrhina rectaP. roddyi = Eoagnostus roddyiP. rotundatus = Quadragnostus rotundatusP. segmenta = Pentagnostus (Meragostus) segmentaP. shandongensis = Ammagnostus laiwuensisP. taitzuhoensis = Itagnostus gaspensis taitzuhoensisP. tramitis = Acadagnostus acadicusP. ultima Poulsen, 1960 = Clavagnostus ultimaP. ultimus Ergaliev, 1980 = ''Pentagnostus (Meragostus) shabaktensis''Species and distribution
Subgenus ''Peronopsis (Peronopsis)''
P. integra , synonyms Battus integer and Mesagnostus integer, is known from the Middle Cambrian of the Czech Republic and Sweden.P. amplaxis Robison, 1982 has been found in the Middle Cambrian of Central Asia and North America.P. batenica Bognibova, 1971 occurs in the Middle Cambrian of the Russian Federation.P. crassa Lermontova, 1940 is present in the Middle Cambrian of the Russian Federation.P. deons Jell and Webbers, 1992 has been collected in the Middle Cambrian of Antarctica.P. hypagnostiformis Bognibova, 1971 has been found in the Middle Cambrian of the Russian Federation.P. inarmata Hutchinson, 1962 occurs in the Middle Cambrian of Newfoundland, Canada.P. montis Matthew, 1889 is known from the Middle Cambrian of the Russian Federation, and Canada.P. uzbekistanica Hajrullina, 1970 was excavated from the Middle Cambrian of Uzbekistan.Subgenus ''Peronopsis (Proacadagnostus)''
P. normata synonym Diplorrhina normata is recorded from the Middle Cambrian of the Russian Federation, Scandinavia, England, Spain, China, and Australia.Subgenus ''Peronopsis (Svenax)''
P. pusillus synonym Agnostus pusillus has been found in the Middle Cambrian of Australia and Sweden.P. egenus is known from the Middle Cambrian of the Russian Federation, China, England and Greenland.P. eoscutalis Hajrullina, 1970 occurs in the Middle Cambrian of Uzbekistan.P. hartshillensis Kobayashi, 1939 has been deposited in the Middle Cambrian of England.P. lingula synonym Svenax vafer, is present in the Middle Cambrian of Australia and Greenland.P. matthewi Hutchinson, 1962 has been found in the Middle Cambrian of England and Canada.P. scutalis Hicks, 1872 was recorded originally from the Menevia Formation of Rees et al., in the eastern side of Porth-y-rhaw, SW Wales, which is therefore type locality for the species. Subspecies of scutalis include:- * Peronopsis scutalis scutalis Salter ; nec pl.5, figs, 13, 14, = P. scutalis ] from the Hypagnostus parvifrons Biozone and basal Pt. punctuosus Biozone of Porth-y-rhaw and from the parvifrons Biozone exposed behind the lifeboat house, Solva Harbour, St David's;
- * Peronopsis scutalis tenuis from the lower Tomagnostus fissus Biozone in the Abbey Shale Formation of Nuneaton, central England and the coeval lower Menevia Formation of Dwrhyd, Nine Wells, St David's;
- * Peronopsis scutalis exarata, described originally from the Biozones of Hypagnostus parvifrons and Paradoxides davidis in Bornholm, and occurring also in the same Biozones at Porth-y-rhaw.