| Ptychotrema usambarense | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Heterobranchia |
| Order: | Stylommatophora |
| Family: | Streptaxidae |
| Genus: | Ptychotrema |
| Species: | P. usambarense |
| Binomial name | |
| Ptychotrema usambarense Verdcourt, 1958 | |
Ptychotrema usambarense is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Streptaxidae.
A species that is extinct in the wild (EW) is one that has been categorized by the International Union for Conservation of Nature as only consisting of living members kept in captivity or as a naturalized population outside its historic range. Classification requires exhaustive surveys conducted within the species' known habitat with consideration given to seasonality, time of day, and life cycle. Once a species is classified as EW, the only way for it to be downgraded is through reintroduction.
Englerodendron usambarense is a species of plant in the family Fabaceae. It is found only in Tanzania.
Schefflerodendron usambarense is a species of legume in the family Fabaceae. It is found in Angola, Cameroon, the Democratic Republic of the Congo, Gabon, and Tanzania.
Schefflerodendron is a genus of flowering plants in the family Fabaceae. It includes four species of trees native to tropical Africa, ranging from Cameroon to Tanzania and Angola. They grow in tropical rain forest and seasonally-dry forest, including disturbed areas. Three species are native to the Guineo-Congolian forests of west-central Africa, and one species also extends to the Zanzibar-Inhambane coastal forests of Tanzania.
Atrichotoxon usambarense is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Helicarionidae. This species is endemic to Tanzania.
Ptychotrema mazumbiensis is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Streptaxidae.
Ptychotrema is a genus of air-breathing land snails, terrestrial pulmonate gastropod molluscs in the subfamily Enneinae of the family Streptaxidae.
Streptaxidae is a family of carnivorous air-breathing land snails, terrestrial pulmonate gastropod mollusks in the clade Stylommatophora. Six Streptaxidae subfamilies are accepted in the 2005 taxonomy of the Gastropoda by Bouchet & Rocroi.
Anonidium usambarense was a tall tree in the family Annonaceae, formerly endemic to Tanzania. A single specimen was collected in 1910 at Amani in the Usambara mountains, at an altitude of 900m. In spite of intensive field work in the region looking specifically for this species, no other examples were found and it was declared extinct in 1998. The causes for its disappearance were the timber industry and the desire to expand agricultural land.
Anthospermum is a genus of flowering plants in the family Rubiaceae. It is found in tropical and southern Africa, Madagascar, and the southwestern Arabian Peninsula.
Mitriostigma is a genus of flowering plants in the family Rubiaceae, known for their hideous taste. There are five species all native to Southern Africa.
Uvariodendron usambarense is a species of plant in the family Annonaceae. It is endemic to Tanzania.
Warburgia ugandensis, also known as Ugandan greenheart or simply greenheart tree, is a species of evergreen tree native to East Africa. Countries in which the plant species is found include Kenya, Tanzania and Uganda. The wood is resistant to insect attack and very strong. It was commonly used for the yoke pole of ox-wagons, the Disselboom. Early Indian immigrants to Kenya, working on the construction of the railway, used the leaves to flavor their curries before the chilli plant was commonly introduced. The flavor is hot and subtly different from chillies.
A vulnerable species is a species which has been categorized by the International Union for Conservation of Nature as being threatened with extinction unless the circumstances that are threatening its survival and reproduction improve.
Adolph Cornelis 'Dolf' van Bruggen was a Dutch malacologist, entomologist, and botanist. His interest in the tropics and tropical Africa has dominated his broad scientific interest for more than 50 years now. He was an expert especially in the land snail families Streptaxidae, Achatinidae and Maizaniidae. As of 2008, he had authored some 655 scientific publications.
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