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MonographDOI

Peixes cretaceos do Ceará e Piauhy

01 Jan 1921-
About: The article was published on 1921-01-01 and is currently open access. It has received 5 citations till now.

Summary (2 min read)

Família LEPTOLEPID.®

  • Tem a disposição geral da nadadeira dos Isospondyli, mas as escamas são mais ou menos rhomboides e ganoides T).as partes expostas e as ultimas hind the dorsal.
  • The short dorsal in which the artist counts about a dozen rays is inserted just behind the ventrals.
  • It has the general fin arrangement of the latter, but the scales are more or less diamond-shaped and ganoid on their exposed parts, and the last verte-vertei )ras são mais ou menos voltadas para cima, ainda que a nadadeira caudal seja usualmente ou sempre bifurcada.
  • As placas orbitaes cobrem a face como nas Efopidae, mas não teem placa guiar, tanto quanto sabemos.

Genus THARRHIAS

  • The authors do not much doubt the identify of this specimen witli the type of Tharrhias araripis, but the difference in the scales suggests that possibly the rbombic form in the latter case may be due in part to sbrivelling of the specimen before it was encased in clay.
  • Um segundo exame do typo (N. Since writing the above account of Tharrhias araripis, the writer has received from Dr. Orville A. Derby another specimen which helongs apparently to this species.
  • The vertebrm at the angle are large, the others regularly smaller to the tip.
  • Na cauda e base da nadadeira estão numerosas escamas gramles de grossa textura, a porção posterior, porém, pouco arredondada, (juasi truncada.
  • It shows a large opercle, deeper than long, with a small subopercle, a head about equal to depth, a little less than distance from gill opening to ventral.

Family ELOPIDi®

  • Tbe family of Efopidae is ebaracterized among tbe soft-rayed íislies by tbe presence of a triangular bone, or guiar jdate, between tbe rami of tbe lower jaw.
  • Tbis plate is present in tbe Amialidie and in some otber ganoids, and it furnisbes strong evidence tbat tbe Elop idie are descended from extinct forms resembling.
  • Tbe belly is rounded in all tbe Elopidse and not provided witb scutes.
  • Tbe scales aro cycloid witb membranaceous edges.
  • Tbe teeth vary witb tbe different genera.

Ánaedopogo7i.

  • Bbb) Dentition uneven, some of the teeth large, robust canines.
  • Maxillary extending far beyond eye; front of jaws with very hroad teeth; posterior teeth in lower jaw small and even.

B -Specimens without lateral line

  • In the Rocha Collection is one head (N. 25, Rocha) more or less crushed andsplit through themiddle, but showing the long jaws armed with long, sharp, slender, even teeth, V4 to '/e the diameter eye.
  • Maxillary more than half head, extending far behind eye; subopercle about half size of opercle and nearly V3 its depth the suture horizontal, the lower bone with radiating ridges ; orbital bones obscurely shown.
  • This head corresponds fairly well to Woodward's figure of the head of Notelops brama, but the postorbital bones are wanting and no scales are preserved.
  • In the collection of the Serviço Geologico do Brazil, this species is especially well represented.
  • As escamas são de textura mais fina do ((ue no IViacolepis, exactamente como nos denominados Calamopleu7'us.

Other fins lost

  • ; anterior vertebras small, longer than deep, constricted.
  • N. 99, Simões, mostra impressões fracas de cabeça e frente do corpo com uma nadadeira dorsal.
  • Dorsal short high and falcate of about 15 rays, the anterior rays half longer than the base of the íin.
  • N. 49, Jardim, is a trunk seen from below, showing pectoral and ventral fins and the position of anal and caudal.

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PEIXES
CRETÁCEOS
DO
CEARÁ
E
PIAUHY
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MINISTÉRIO DA
AGRICULTURA,
INDUSTRIA
E COMMERCIO
MONOGRAPHIAS
DO
Serviço
Geologico
e
Mineralógico
Jo Brasil
iri
RIO
DE
JANEIRO
IMPRENSA NACIONAL
1923


SERVIÇO
GEOLOGICO E
MINERALÓGICO
DO BRASIL
LUIZ F. QONZAQA DE CAMPOS,
Director
Peixes
cretáceos
do Ceará
e
Piauhy
DAVID STARR
JORDAN
Professor da
Universidade
de Stanford, Califórnia
RIO
DE
JANEIRO
IMPRENSA
NACIONAL
1921

Citations
More filters
Journal ArticleDOI
TL;DR: In the case of the Romualdo Member of the Santana Formation Konservat Lagerstatten of north-east Brazil, it was first dated as Cretaceous by Agassiz on the basis of fish fossils obtained by Bavarian explorers Spix and Martius between 1817 and 1820 as discussed by the authors.

106 citations

Journal ArticleDOI
TL;DR: In the interior of northeastern Brazil there occurs the Santana Formation of Aptian age, composed lithologically of three members: Crato - an alternation of thin limestones and shales; Ipubi - gypsum; and Romualdo - almost pure limestone as discussed by the authors.

72 citations

Journal ArticleDOI
TL;DR: The family Chongichthyidae shows some morphological similarities to elopiforms, pachyrhizodontoids, clupeomorphs, osteoglossomorphs and euteleosts, but it also differs from all of them in certain respects and is therefore regarded as Teleostei incertae sedis.
Abstract: The new family Chongichthyidae is based on Chongichthys dentatus n. gen. et sp. from the Oxfordian marine deposits of the Domeyko Range, southeast of Antofagasta, northern Chile. Chongichthys dentatus differs from other Late Jurassic teleosts of South America and Europe in having: fenestrae between the prootic, auto-sphenotic and pterotic, and between the basioccipital, exoccipital, prootic and parasphenoid; a prootic fenestra; a large basisphenoid; a small, elongate basioccipital; a distinctive lower jaw; wide supraneurals; epineurals fused to the neural arches; ribs on the first abdominal centra and a distinctive enlargement of the last pleural ribs. The family Chongichthyidae shows some morphological similarities to elopiforms, pachyrhizodontoids, clupeomorphs, osteoglossomorphs and euteleosts, but it also differs from all of them in certain respects and is therefore regarded as Teleostei incertae sedis.

13 citations

Journal ArticleDOI
TL;DR: A character assemblage clearly demonstrates the necessity of including stem taxa in phylogenetic analysis based on morphology to resolve the controversial relationships of these basal teleostean fishes.

8 citations