This tree diagram shows the relationships between several groups of organisms.
The root of the current tree connects the organisms featured in this tree to their containing group and the rest of the Tree of Life. The basal branching point in the tree represents the ancestor of the other groups in the tree. This ancestor diversified over time into several descendent subgroups, which are represented as internal nodes and terminal taxa to the right.
You can click on the root to travel down the Tree of Life all the way to the root of all Life, and you can click on the names of descendent subgroups to travel up the Tree of Life all the way to individual species.close box
Right side of Gyrinus sp.
When the beetles are swimming on the surface of the water, the dorsal portion of the eye is in air, and the ventral portion in water.
Beutel, R. G. 1989a. The head of Spanglerogyrus albiventris Folkerts (Coleoptera: Gyrinidae). Contribution towards clarification of the phylogeny of Gyrinidae and Adephaga. Zool. Jb. Anat. 118(4): 431-461.
Beutel, R. G. 1989b. The prothorax of Spanglerogyrus albiventris Folkerts, 1979 (Coleoptera: Gyrinidae) Contribution towards clarification of the phylogeny of Gyrinidae. Entomologica Basiliensia 13: 151-173.
Beutel, R. G. 1990. Phylogenetic analysis of the family Gyrinidae (Coleoptera) based on meso- and metathoracic characters. Quaestiones Entomologicae, 26:163-191.
Beutel, R. G., and R. E. Roughley. 1988. On the systematic position of the family Gyrinidae (Coleoptera: Adephaga). Z. zool. Syst. Evolut.-forsch, 26:380-400.
Beutel, R. G., and R. E. Roughley. 1994. Phylogenetic analysis of Gyrinidae based on characters of the larval head (Coleoptera: Adephaga). Entomologica scandinavica 24: 459-468.
Burmeister, E.G. 1990. The female genital structures of Spanglerogyrus albiventris Folkerts, 1979: A contribution to the systematic position of the Gyrinidae. Spixiana 13(3): 253-265.
Folkerts, G. W. 1979. Spanglerogyrus albiventris, a primitive new genus and species of Gyrinidae (Coleoptera) from Alabama. The Coleopterists Bulletin 33(1): 1-8.
Page copyright © 1995 David R. Maddison
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Tree of Life Web Project. 1995. Gyrinidae. Whirlygig beetles. Version 01 January 1995 (temporary). http://tolweb.org/Gyrinidae/8882/1995.01.01 in The Tree of Life Web Project, http://tolweb.org/