liik

Didymograptus extensus (Hall, 1858)

Sünonüümika
1858     Graptolithus extensus — Hall , lk. 132
1901     Didymograptus extensus — Elles & Wood , lk. 8-9, joon. 1:1a,v; text fig. 4a-d
1947     Didymograptus extensus — Ruedemann , lk. 331-332, joon. 55:16; 56:1,2
1960     Didymograptus extensus — Berry , lk. 60-61, joon. 6:5; 8:10
1976     Didymograptus extensus (hall) — Braithwaith , lk. 48, joon. 9:10, 11, 13