The opossum is a marsupial of the order Didelphimorphia endemic to the Americas. The largest order of marsupials in the Western Hemisphere, it comprises 103 or more species in 19 genera. Opossums originated in South America and entered North America in the Great American Interchange following the connection of the two continents. Their unspecialized biology, flexible diet, and reproductive habits make them successful colonizers and survivors in diverse locations and conditions.
The dorsal column–medial lemniscus pathway (DCML) is a sensory pathway of the central nervous system that conveys sensations of fine touch, vibration, two-point discrimination, and proprioception (position) from the skin and joints. It transmits information from the body to the primary somatosensory cortex in the postcentral gyrus of the parietal lobe of the brain. The pathway receives information from sensory receptors throughout the body, and carries this in nerve tracts in the white matter of the dorsal columns of the spinal cord, to the medulla where it is continued in the medial lemniscus, on to the thalamus and relayed from there through the internal capsule and transmitted to the somatosensory cortex. The name dorsal-column medial lemniscus comes from the two structures that carry the sensory information: the dorsal columns of the spinal cord, and the medial lemniscus in the brainstem.
The northwestern salamander inhabits the northwest Pacific Coast of North America. These fairly large salamanders grow to 8.7 in (220 mm) in length. It is found from southeastern Alaska on May Island, through Washington and Oregon south to the mouth of the Gulala River, Sonoma County, California. It occurs from sea level to the timberline, but not east of the Cascade Divide. Its range includes Vancouver Island in British Columbia and The San Juan Islands, Cypress, Whidbey, Bainbridge, and Vashon Islands in Washington.
The gracile fasciculus is a nerve tract in the dorsal column-medial lemniscus pathway of the spinal cord and carries information from the lower parts of the body. The gracile fasiculus is one of many ascending tracts which carry received sensory information to the brain via the spinal cord. It is also one of the dorsal columns, the other being the cuneate fasciculus.
In neuroanatomy, the dorsal column nuclei are a pair of nuclei in the dorsal columns in the brainstem. The name refers collectively to the cuneate nucleus and gracile nucleus, which are present at the junction between the spinal cord and the medulla oblongata. Both nuclei contain second-order neurons of the dorsal column-medial lemniscus pathway, which carries fine touch and proprioceptive information from the body to the brain. Each nucleus has an associated nerve tract, the gracile fasciculus and the cuneate fasciculus.
Chamelaucium, also known as waxflower, is a genus of shrubs endemic to south western Western Australia. They belong to the myrtle family Myrtaceae and have flowers similar to those of the tea-trees (Leptospermum). The most well-known species is the Geraldton Wax, Chamelaucium uncinatum, which is cultivated widely for its large attractive flowers.
The Brazilian gracile opossum is a species of small opossum from Brazil.
The gracile tateril or slender gerbil is a species of gerbil found in Burkina Faso, Chad, Gambia, Ghana, Guinea, Ivory Coast, Mali, Niger, Nigeria, Senegal, Togo, and possibly Cameroon. Its natural habitats are dry savanna, arable land, pastureland, and rural gardens. It is a common species, sometimes considered an agricultural pest, and the International Union for Conservation of Nature has rated its conservation status as being of "least concern".
The Aceramarca gracile opossum or Bolivian gracile opossum is a species of opossum. It is native to Bolivia and Peru, where it occurs in tropical elfin forest habitat.
Gracilinanus is a genus of opossum in the family Didelphidae. It was separated from the genus Marmosa in 1989, and has since had the genera Cryptonanus, Chacodelphys, and Hyladelphys removed from it. It contains the following species:
The Didelphinae are a subfamily of opossums consisting of 15 genera and 98 species, one of them extinct. Specimens have been collected throughout the Americas, but are predominant in South and Central America.
In biology, robustness is used to describe a taxon with a stronger and heavier build (morphology) when compared to a related gracile taxon. The terms are used in contrast to one another.
Gracility is slenderness, the condition of being gracile, which means slender.
Robust capuchin monkeys are capuchin monkeys in the genus Sapajus. Formerly all capuchin monkeys were placed in the genus Cebus; Sapajus was erected in 2012 by Jessica Lynch Alfaro et al. to differentiate the robust (tufted) capuchin monkeys from the gracile capuchin monkeys, which remain in Cebus.
Gracile capuchin monkeys are capuchin monkeys in the genus Cebus. At one time all capuchin monkeys were included within the genus Cebus. In 2011, Jessica Lynch Alfaro et al. proposed splitting the genus between the robust capuchin monkeys, such as the tufted capuchin, and the gracile capuchins. The gracile capuchins retain the genus name Cebus, while the robust species have been transferred to Sapajus.
Calveriosoma gracile is a species of sea urchin in the order Echinothurioida. It is a deep water species and is found on the seabed in western parts of the Pacific Ocean at depths of 200 to 800 metres.
Haemodorum is a genus of herbs in the family Haemodoraceae, first described as a genus in 1798. It is native to New Guinea and Australia. The type species is Haemodorum corymbosum Vahl.
- Haemodorum austroqueenslandicumDomin - SE Queensland, NE New South Wales
- Haemodorum brevicauleF.Muell. - Queensland, Northern Territory, N Western Australia
- Haemodorum brevisepalumBenth. - SW Western Australia
- Haemodorum coccineumR.Br. - New Guinea, Queensland, Northern Territory
- Haemodorum corymbosumVahl - New South Wales
- Haemodorum discolorT.D.Macfarl. - SW Western Australia
- Haemodorum distichophyllumHook. - Tasmania
- Haemodorum ensifoliumF.Muell. - NW Northern Territory, N Western Australia
- Haemodorum gracileT.D.Macfarl. - N Western Australia
- Haemodorum laxumR.Br. - SW Western Australia
- Haemodorum loratumT.D.Macfarl. - SW Western Australia
- Haemodorum paniculatumLindl. - SW Western Australia
- Haemodorum parviflorumBenth. - N Northern Territory, N Western Australia
- Haemodorum planifoliumR.Br. - SE Queensland, New South Wales
- Haemodorum simplexLindl. - SW Western Australia
- Haemodorum simulansF.Muell. - SW Western Australia
- Haemodorum sparsiflorumF.Muell. - SW Western Australia
- Haemodorum spicatumR.Br. - SW Western Australia
- Haemodorum tenuifoliumA.Cunn. ex Benth. - SE Queensland, NE New South Wales
- Haemodorum venosumT.D.Macfarl. - SW Western Australia
Prasophyllum gracile, commonly known as the little laughing leek orchid, is a species of orchid endemic to the south-west of Western Australia. It is one of the most common and widespread orchids in the south-west and has a single smooth, tube-shaped leaf and up to forty or more, usually yellowish-green flowers.
Baloskion gracile is a species of perennial herb found near Sydney in Australia. A rush with stems from 30 to 100 cm tall. The preferred habitat is wet, sandy soil. This is one of the many plants first published by Robert Brown with the type known as "(J. D.) v.v." appearing in his Prodromus Florae Novae Hollandiae et Insulae Van Diemen in 1810. The specific epithet gracile meaning slender, refers to the thin stems.
