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euagarics clade, is a monophyletic group of approximately 8500 mushroom species...read more more featured pages The Tree of Life Web Project (ToL) is a collaborative effort of biologists and nature enthusiasts from around the world. On more than 10,000 World Wide Web pages, the project provides...
The life history cannot be reconstructed with confidence for all the extinct terrestrial vertebrates, but a few taxa exceptionally well represented in the fossil record give us a glimpse at the life history of these taxa. Some temnospondyls and seymouriamorphs are known to have had larvae with...
The ear of stegocephalians is divided into the inner ear (the only part found in primitively aquatic vertebrates such as hagfishes, lampreys, chondrichthyans, and actinopterygians), the middle ear, and the external ear. The external ear is...
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tolweb.org
Notobatrachus_degiustoi
Notobatrachus degiustoi is a Middle Jurassic (155-170 million years old) frog known from several well-preserved specimens from the La Maltilde Formation in Santa Cruz Province, Patagonia, Argentina. Most of the specimens are 100-120 mm in...
Click on an image to view larger version & data in a new window Partial classification of salticids based on Maddison (1988, 1996). Containing group: Dionycha Introduction Jumping spiders (Salticidae) are easily distinguished from other spiders by their four big eyes on the face and four smaller...
Click on an image to view larger version & data in a new window Planctosphaeroidea Planctosphaeridae Pterobranchia Cephalodiscidae Rhabdopleuridae Atubaridae Enteropneusta Ptychoderidae Harrimaniidae Spengelidae Saxipendiidae Containing group: Deuterostomia Other Names for Hemichordata References...
Click on an image to view larger version & data in a new window Tree after Stockwell (1989) Containing group: Arachnida Introduction Scorpions are easily distinguished from other arachnids by their large, well developed claws (pedipalps) and distinct division of the abdomen (opisthosoma) into a...
Click on an image to view larger version & data in a new window Containing group: Embryophytes Other Names for Spermatopsida References Bowe, L. M., G. Coat, and C. W. dePamphilis. 2000. Phylogeny of seed plants based on all three genomic compartments: Extant gymnosperms are monophyletic and...
Click on an image to view larger version & data in a new window Containing group: Troctomorpha Introduction Lice belong to the order Phthiraptera, and are the only truly parasitic group amongst the exopterygote insects. As permanent...
Frogs and toads, salamanders and newts, and caecilians David Cannatella Click on an image to view larger version & data in a new window Introduction This group, which includes all living amphibians, as well as their extinct relatives, goes...
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