Palaxius floridanus n. isp., a new structured callianassid crustacean microcoprolite from the Pleistocene of south Florida

Abstract

The crustacean microcoprolite Palaxius floridanus n. isp. is described from shallow-water carbonate platform deposits of Pleistocene limestones of south Florida. Palaxius floridanus n. isp. occurs in moderate-energy packstones and grainstones of the oolite facies of the Miami Limestone, and in skeletal packstones of the Key Largo Limestone, ranging in age from marine isotope stage (MIS) 11 to MIS 5a (ca. 400–80 kyr BP). The new ichnospecies resembles P. decemlunulatus, which has been described previously from Oligocene deposits. Late Jurassic and Late Cretaceous forms described as P. decemlunulatus belong to a new ichnogenus and new ichnospecies, respectively, yet to be described.

Invertebrate coprolites and cololites revised

“…Palaxius decemlunulatus (Paréjas, ) Förster & von Hillebrandt, ; P. petenensis Brönnimann & Norton, ; P. sirticus Brönnimann & Norton, ; P. triasicus (Elliott, ) Molinari Paganelli et al ., ; P. kurdistanensis (Elliott, ) Senowbari‐Daryan & Grötsch, ; P. decaochetarius Palik, ; P. tetraochetarius Palik, ; P. triochetarius Palik, ; P. aiglensis Brönnimann et al ., (= P. rhomboideus Brönnimann et al ., ); P. salataensis Brönnimann et al ., ; P. decemporatus Senowbari‐Daryan, ; P. montemeranoensis Blau & Grün, ; P. velienensis Senowbari‐Daryan & Vartis‐Matarangas, ; P. biserialis (Kristan‐Tollmann, ) Senowbari‐Daryan & Kube, ; P. darjaensis Silantiev in Senowbari‐Daryan & Silantiev, ; P. kumaensis Senowbari‐Daryan & Silantiev, ; P. colombiensis Blau et al ., ; P. groesseri Blau et al ., ; P. caucaensis Blau et al ., ; P. hydranensis Senowbari‐Daryan & Kube, ; P. osaensis Buchs et al ., ; P. azulensis Kietzmann in Kietzmann et al ., ; P. caracuraensis Kietzmann in Kietzmann et al ., ; P. malarguensis Kietzmann in Kietzmann & Palma, ; P. mendozaensis Kietzmann in Kietzmann & Palma, ; P. rahuensis Kietzmann in Kietzmann & Palma, ; P. minaensis Dalvand et al ., ; P. asmariensis Dalvand et al ., ; P. floridanus Gischler et al ., .…”