The ammonites collected from southeastern Hunan contain 36 species, 17
  genera and 6 families, among which 11 species and 7 genera had been reported
  as new in English (Zhou, 1985) just before, and all of these ammonites (iin-
  cluding another 8 new species) are described here in Chinese.  Stratigraphi-,
  cally, they may be divided into 5 assemblage-zones in ascending order, namely
  Pseudohalorites, Shaoyangoceras, Altudoceras-Paracettites, Guiyangoceras and Roado-
  ceras-Doulingoceras Zones.  The former two, rich in local colour, are formed
  by the genera of Shouchangocerataceae, while the latter three alre mainly com-
  posed of the genera of Paragastrioceratidae and Paraceltitidae  which are
  apparently characteristic of the Tethys Realm.
      Taking into account that the horizon of the goniatitic shouchangoceratids
  is higher than that of the ceratitic pseudohaloritids and subammonitic shao-
  yangoceratids, the writer tends to regard the first one an independent and
  conservative evolutionary branch other than the second two groups, and na-
  mes it Shouchangoceratidae. Results from the correlations between Pseudohalo-
  rites Zone and fusulinid Misellina claudiae Zone, and between Shaoyangocer'as
  Zone and fusulinid Parafusulina multiseptata Zone show that Shaoyangoceras is
  stratigraphically higher than Pseudohalorites and, besides, the early ontogeny
  of Shoyangoceras must have gone through the Pseudohalorites-stage (text-fig.
  16).  Now that both are presumed to have a close affinity, they must be pla-
  ced to the same lineage of evolution, representing the progressive stock both
  in suture and in sculpture, and should be referred to the same family Pseudo-
  haloritidae originated immediately from the genus Neoaganides or through the
  genus Lianyuanoceras. lt is suggested that the families Shouchangoceratidae
  and Pseudohaloritidae be comprised in the superfamily Shouchangocerataceae
  (table III) along with the superfamily Cheilocerataceae.