Redescription of Ellimma branneri and Diplomystus shengliensis : and relationships of some basal clupeomorphs

Title Variants

Alternative: Redescription of Ellimma branneri and Diplomystus shengliensis

Alternative: Relationships of some basal clupeomorphs

Alternative: Two extinct clupeomorphs

Related Titles

Series: American Museum novitates, no. 3404

By

Zhang, Miman. 张弥曼

Maisey, John G.

Type

Book

Material

Published material

Publication info

New York, NY American Museum of Natural History c2003

Notes

Title from caption.

"May 22, 2003."

In title "Ellimma" and "Diplomystus" are preceded by a dagger.

"Two extinct clupeomorphs, ýEllimma branneri from the Cretaceous of Brazil and ýDiplomystus shengliensis from the Eocene of China, are redescribed. ýEllimma branneri was formerly classified within the Clupeiformes, but it lacks derived characters of clupeiforms and clupeoids. Dorsal scute 'wings' are expanded and subrectangular in ýEllimma and other members of the family ýParaclupeidae Chang and Chou (1977), approximately equal to ýEllimmichthyidae Grande (1982a). Consequently, ýEllimma branneri is classified here within the family ýParaclupeidae. ýParaclupeidae are known from the Lower Cretaceous to the middle Eocene. In the present work, two monophyletic groups are identified within the ýParaclupeidae. One group (subfamily ýParaclupeinae of Chang and Grande, 1997), known only from the Lower Cretaceous (Hauterivian-Albian), includes ýParaclupea, ýEllimmichthys, and ýEllimma. These taxa are united by strongly sculptured, skull-roofing bones with ridges radiating from the growth center, and a dorsal scute ornament of prominent ridges. ýScutatuspinosus may also belong in this group. The other group includes ýDiplomystus (Upper Cretaceous-Eocene) and ýArmigatus (Upper Cretaceous), which are united by a single homoplaseous character (presence of a posteriorly expanded third hypural, leaving no gap between hypurals 2 and 4): this character also occurs in pristigasteroids, ýErichalcis, osteoglossids, some elopomorphs (ýLebanichthys lewisi, and most Albula spp.), and a number of ostariophysans not included in our analysis. ýParaclupeines are customarily regarded as being more closely related to the Clupeiformes than to other teleosts (i.e., as clupeomorphs), although no derived characters are uniquely shared by ýEllimma branneri and modern Clupeiformes. The relationships of ýEllimma and certain other extinct herring-like teleosts (including other ýparaclupeines) with the Clupeiformes are unclear, and they may collectively form a paraphyletic assemblage. No biogeographical hypothesis satisfactorily explains the known distribution of nonmarine ýparaclupeine fishes in the Cretaceous. A substantial portion of their nonmarine fossil record is missing (as evidenced by the recent discovery of a possible ýparaclupeine, ýEzkutuberezi carmeni Poyato-Ariza et al., 2000, in Spain), and some aspects of their early distribution pattern may have involved marine dispersal. Eocene ýDiplomystus occurs on both sides of the Pacific Ocean, but the 'Pacifica' hypothesis (which lacks empirical support) is abandoned as an explanation for such Eocene (and younger) trans-Pacific distribution patterns of nonmarine fishes. Instead, a 'freshwater Arctic Ocean' hypothesis is favored. According to this hypothesis (for which there are several independent lines of geological evidence), temporary desalination of the Arctic Ocean occurred during the Paleocene and early Eocene, which may have permitted freshwater fishes to move unimpeded by salt-water barriers between Asia and North America; this temporary desalination event may eventually become recognized as a significant factor in the holarctic distribution patterns of various Tertiary-Recent freshwater fishes"--P. [1]-2.

Subjects

Bo Hai , Brazil , China , Clupeiformes , Cretaceous , Diplomystus shengliensis , Dispersal , Ellimma branneri , Eocene , Fishes, Fossil , Freshwater fishes , Geographical distribution , Paleontology , Phylogeny , Sergipe-Alagoas Basin

Call Number

QL1 .A436 no.3404, 2003

Language

English

Identifiers

DOI: https://doi.org/10.1206/0003-0082(2003)404<0001:ROEBAD>2.0.CO;2
OCLC: 52317343