"Parapterois heterura " is very similar in appearance to the closely related " " Parapterois macrura ".
2.
Missing most of its head and neck, it was described in 1863 by Richard Owen as " Archaeopteryx macrura ", allowing for the possibility it did not belong to the same species as the feather.
3.
Owen speculated possible short-and long-tailed forms of " Archaeopteryx " and on these grounds assigned the London specimen the species name " macrura ", meaning " long-tailed ".
4.
Researchers tend to use the " Sergia lucens ", which Danish zoologist Hans Jacob Hansen gave it in 1922, especially since Isabella Gordon published a detailed account of the species in " On New Or Imperfectly Known Species of Crustacea Macrura " in 1935 using Hansen's designation.
5.
Also, in adults, the upper margin of the eye of " P . heterura " is below the base of the first dorsal fin spine, while it is above in " P . macrura " ( this trait is not consistent in juveniles, in which the eye margin may be below in both species ).
6.
Since, Amigos del Pande�o is responsible for managing El Pande�o hotspring, home to the endangered Julimes pupfish ( " Cyprinodon julimes " ), the Julimes springsnail ( " Tryonia julimensis " ) and the Juimes isopod ( " Thermosphaeroma macrura " ) as part of the " Custodial Wildlife Conservation Management Unit Unidades de manejo para la Conservaci�n de la vida silvestre ( UMA )-El Pande�o " SDUE-UMA-EX-096-CHIH-12 " as well as monitoring its Vital Signs ."
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