Neoagnostus Kobayashi, 1955

Taylor, John F., Loch, James D. & Repetski, John E., 2024, Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia, Zootaxa 5422 (1), pp. 1-66 : 54

Neoagnostus Kobayashi, 1955

Type species. Neoagnostus aspidoides Kobayashi, 1955 , by original designation, from the McKay Group , British Columbia, Canada .

Diagnosis. The diagnosis of Naimark (2016, p. 61–62) that features a “V-shaped” F3 and chevron-shaped F2 glabellar furrows and pygidial axial furrows which fail to surround the posteroaxis, and a pair of inflated nodes located posterior to F2 is accepted.

Other species. N. bilobus ( Shaw, 1951) ; N. longicolis Kobayashi, 1966 ; N. eckardti Jell, 1985 ; N. hangulensis Lu & Zhou , in Lu et al., 1981; N. shiziluensis Lu and Zhou, 1990 ; N. tarjensis ( Gilberto, 2010) ; N. parki n. sp.

Discussion. Shergold(1975, 1977) considered Neoagnostus a subjective junior synonym of Pseudorhaptagnostus Lermontova, 1951 , which he treated sensu lato. He described a “spectaculate” morphology in which the glabellar node lies posterior to the F2 glabellar furrow which he subdivided into multiple species groups. Among these “spectaculate” forms he included a “ Bilobus group ” that he acknowledged may have represented a genus-level grouping and which included Neoagnostus aspidoides , the type species of Neoagnostus . Shergold (1980) then provisionally recognized Neoagnostus as a valid genus. Shergold et al. (1990; Shergold & Laurie, 1997) sought to establish subgenera for Neoagnostus , a practice followed by some authors (Nielson, 1997). Naimark (2016) briefly discussed the nomenclatorial history of Pseudorhaptagnostus and revived the generic status of Neoagnostus without subgenera.