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in the floor of the basioccipital are interpreted as the entrance of the basilar artery, and exit the ventral surface of the basioccipital as multiple small and anteriorly placed foramina. Extreme downgrowth of the pterygoid processes of the basisphenoid. Lightly built postorbitofrontal processes.
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Based on the lack of fusion between elements of the basicarnium and a high degree of vascularization of the bone surface, which suggests the animal was undergoing a rapid growth stage when it died, the
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broad and blunt, in dorsal view the premaxillary-maxillary suture is oblique. The ectopterygoid is lightly built and composed of a distinct small subrectangular
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Bell, G. L. Jr., 1997. A phylogenetic revision of North
American and Adriatic Mosasauroidea. pp. 293β332 In Callaway J. M. and
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405:
194:
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n. gen., n. sp., a 92 million-year-old mosasaur from Texas (USA), and the definition of the parafamily
Russellosaurina.
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the type genus of a new parafamily of mosasaurs, the
Russellosaurina (= subfamily Russellosaurinae of Bell, 1997). This
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33:
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are believed to constitute a clade "basal to the divergence" of the subfamilies
Plioplatecarpinae and Tylosaurinae.
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The pineal foramen is located in the centre of the triangular parietal table. The supraoccipital loose
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have been recovered from the slightly older Kamp Ranch
Limestone at two other localities in the
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contact with parietal. Median cleft in posterior parietal margin in dorsoventral aspect."
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is believed to have come from a subadult individual. An even more primitive mosasaur,
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of marine lizards is defined as all mosasaurs more closely related to the subfamilies
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is notable as being the oldest well-preserved mosasaur yet found in North
America.
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396:) at Cedar Hill, Dallas County in the south-central part of the DFW Metroplex in
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discovered in an exposure of the
Arcadia Park Shale (lower Middle
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Dale A. Russell for his extensive work on mosasaurs ("Russell's
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process. Incipient emargination of the frontal by the external
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collector who discovered SMU 73056, and the genus name honours
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of mosasaur to have been named for
Russell, the first being
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narrow with a length to width ratio of 1.6:1. Sixteen
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459:(Wright and Shannon, 1988). The type specimen of
578:analysis indicates a close relationship between
524:Polcyn et Bell (2005, p. 322) designated
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471:Polcyn et. Bell (2005, p. 323) diagnose
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1405:List of mosasaur-bearing stratigraphic units
475:as follows: "Small, lightly built mosasaur,
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652:Polcyn, M. J. and Bell, G. L., Jr. 2005.
69:Learn how and when to remove this message
32:This article includes a list of general
663:Wright, K. R. and S. W. Shannon. 1988.
408:) was found in 1992 by a member of the
7:
672:Journal of Vertebrate Paleontology
658:Netherlands Journal of Geosciences
38:it lacks sufficient corresponding
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592:mosasaur from the Turonian of
410:Dallas Paleontological Society
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1558:Fossil taxa described in 2005
1395:Timeline of mosasaur research
406:Southern Methodist University
436:, was named for the amateur
507:separated by a thin median
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1553:Mosasaurs of North America
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1265:Related groups and genera
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585:Yaguarasaurus columbianus
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190:Scientific classification
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16:Extinct genus of lizards
1400:List of mosasaur genera
643:Ancient Marine Reptiles
495:and a slender rod-like
448:"). This is the second
350:Polcyn & Bell, 2005
53:more precise citations.
1520:Paleobiology Database
654:Russellosaurus coheni
620:Russellosaurus coheni
388:was described from a
345:Russellosaurus coheni
544:, consisting of the
625:Dallasaurus turneri
599:Tethysaurus nopcsai
324:Polcyn & Bell,
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1507:Open Tree of Life
1436:Taxon identifiers
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1388:Related articles
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1080:Plioplatecarpini
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588:, a primitive
580:Russellosaurus
557:Russellosaurus
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503:. A pair of
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402:Paleontology
371:tethysaurine
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334:Type species
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1357:Adriosaurus
1341:Pontosaurus
1313:Coniasaurus
1292:Komensaurus
1285:Carsosaurus
1237:Romeosaurus
1182:Tethysaurus
1151:Selmasaurus
1096:Platecarpus
988:Halisaurini
944:Plotosaurus
930:Moanasaurus
907:Mosasaurini
786:Jormungandr
772:Dallasaurus
666:Selmasaurus
549:Tethysaurus
467:Description
455:Selmasaurus
374:mosasauroid
298:Subfamily:
51:introducing
1542:Categories
1334:Primitivus
1217:Tylosaurus
1203:Kaikaifilu
1004:Halisaurus
937:Mosasaurus
841:Carinodens
821:Stelladens
793:Kourisodon
641:, (eds.),
540:and their
489:premaxilla
263:Mosasauria
59:March 2015
34:references
1327:Kaganaias
1144:Khinjaria
997:Eonatator
977:Pluridens
848:Globidens
765:Clidastes
719:Kingdom:
709:Mosasaurs
649:, 501 pp.
618:skull of
576:Cladistic
561:subfamily
481:maxillary
434:R. coheni
424:Etymology
376:from the
213:Kingdom:
207:Eukaryota
1473:10578486
1459:Q7381906
1453:Wikidata
1421:Category
869:Xenodens
739:Squamata
733:Reptilia
727:Chordata
725:Phylum:
721:Animalia
668:russelli
616:holotype
606:, these
594:Colombia
574:traits.
505:foramina
457:russelli
394:Turonian
269:Family:
247:Squamata
237:Reptilia
227:Chordata
223:Phylum:
217:Animalia
203:Domain:
98:Turonian
1512:4945992
1499:1274426
1486:4819765
737:Order:
731:Class:
632:Sources
604:Morocco
520:Species
485:dentary
477:frontal
450:species
364:extinct
311:Genus:
243:Order:
233:Class:
164:↓
47:improve
1525:162664
800:Liodon
608:genera
555:, and
509:septum
446:lizard
438:fossil
420:area.
418:Dallas
384:. The
362:is an
36:, but
1494:IRMNG
530:clade
501:nares
497:jugal
398:Texas
390:skull
386:genus
367:genus
283:Clade
254:Clade
1481:GBIF
582:and
546:taxa
536:and
428:The
326:2005
103:Preκ
1468:EoL
380:of
369:of
1544::
1522::
1509::
1496::
1483::
1470::
1455::
645:.
551:,
432:,
404:,
285::
256::
153:Pg
95:,
1200:?
701:e
694:t
687:v
341:β
315:β
302:β
289:β
273:β
260:β
158:N
148:K
143:J
138:T
133:P
128:C
123:D
118:S
113:O
108:κ
72:)
66:(
61:)
57:(
43:.
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