Ceresa Palmeri

	Ceresa Palmeri ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s .... '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' '' Ceresa basalis'' '' Ceresa borealis'' '' Ceresa diceros'' '' Ceresa festina'' '' Ceresa franciscanus'' '' Ceresa inermis'' '' Ceresa lutea'' '' Ceresa pacifica'' '' Ceresa palmeri'' '' Ceresa stimulea'' '' Ceresa tauriniformis'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
picture info	Genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Ceresa Franciscanus ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species. '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' ''Ceresa basalis'' ''Ceresa borealis'' '' Ceresa diceros'' ''Ceresa festina'' '' Ceresa franciscanus'' ''Ceresa inermis'' '' Ceresa lutea'' ''Ceresa pacifica'' ''Ceresa palmeri'' '' Ceresa stimulea'' ''Ceresa tauriniformis ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. ...'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
picture info	Insect Pests Of Temperate Forests Insects (from Latin ') are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (head, thorax and abdomen), three pairs of jointed legs, compound eyes and one pair of antennae. Their blood is not totally contained in vessels; some circulates in an open cavity known as the haemocoel. Insects are the most diverse group of animals; they include more than a million described species and represent more than half of all known living organisms. The total number of extant species is estimated at between six and ten million; In: potentially over 90% of the animal life forms on Earth are insects. Insects may be found in nearly all environments, although only a small number of species reside in the oceans, which are dominated by another arthropod group, crustaceans, which recent research has indicated insects are nested within. Nearly all insects hatch from eggs. Insect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Ceresa Tauriniformis ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s .... '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' '' Ceresa basalis'' '' Ceresa borealis'' '' Ceresa diceros'' '' Ceresa festina'' '' Ceresa franciscanus'' '' Ceresa inermis'' '' Ceresa lutea'' '' Ceresa pacifica'' '' Ceresa palmeri'' '' Ceresa stimulea'' '' Ceresa tauriniformis'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Ceresa Stimulea ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species. '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' ''Ceresa basalis'' ''Ceresa borealis'' '' Ceresa diceros'' ''Ceresa festina'' ''Ceresa franciscanus'' ''Ceresa inermis'' '' Ceresa lutea'' ''Ceresa pacifica'' ''Ceresa palmeri'' '' Ceresa stimulea'' ''Ceresa tauriniformis ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. ...'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Ceresa Palmeri ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s .... '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' '' Ceresa basalis'' '' Ceresa borealis'' '' Ceresa diceros'' '' Ceresa festina'' '' Ceresa franciscanus'' '' Ceresa inermis'' '' Ceresa lutea'' '' Ceresa pacifica'' '' Ceresa palmeri'' '' Ceresa stimulea'' '' Ceresa tauriniformis'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Ceresa Pacifica ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s .... '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' '' Ceresa basalis'' '' Ceresa borealis'' '' Ceresa diceros'' '' Ceresa festina'' '' Ceresa franciscanus'' '' Ceresa inermis'' '' Ceresa lutea'' '' Ceresa pacifica'' '' Ceresa palmeri'' '' Ceresa stimulea'' '' Ceresa tauriniformis'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Ceresa Lutea ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species. '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' ''Ceresa basalis'' ''Ceresa borealis'' '' Ceresa diceros'' ''Ceresa festina'' ''Ceresa franciscanus'' ''Ceresa inermis'' ''Ceresa lutea'' ''Ceresa pacifica'' ''Ceresa palmeri'' ''Ceresa stimulea'' ''Ceresa tauriniformis ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. ...'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Ceresa Inermis ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species. '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' ''Ceresa basalis'' ''Ceresa borealis'' '' Ceresa diceros'' ''Ceresa festina'' '' Ceresa franciscanus'' '' Ceresa inermis'' '' Ceresa lutea'' ''Ceresa pacifica'' ''Ceresa palmeri'' '' Ceresa stimulea'' ''Ceresa tauriniformis ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. ...'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Ceresa Festina ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s .... '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' '' Ceresa basalis'' '' Ceresa borealis'' '' Ceresa diceros'' '' Ceresa festina'' '' Ceresa franciscanus'' '' Ceresa inermis'' '' Ceresa lutea'' '' Ceresa pacifica'' '' Ceresa palmeri'' '' Ceresa stimulea'' '' Ceresa tauriniformis'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Treehopper Treehoppers (more precisely typical treehoppers to distinguish them from the Aetalionidae) and thorn bugs are members of the family (biology), family Membracidae, a group of insects related to the cicadas and the leafhoppers. About 3,200 species of treehoppers in over 400 genera are known.Treehoppers. Dr. Metcalf. NCSU Libraries. North Carolina State University. They are found on all continents except Antarctica; only five species are known from Europe. Individual treehoppers usually live for only a few months. Morphology Treehoppers, due to their unusual appearance, have long interested naturalists. They are best known for their enlarged and ornate pronotum, expanded into often fantastic shapes that enhance their camouflage or mimicry, often resembling Thorns, spines, and prickles, plant th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Ceresa Diceros ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species. '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' ''Ceresa basalis'' ''Ceresa borealis'' '' Ceresa diceros'' ''Ceresa festina'' ''Ceresa franciscanus'' ''Ceresa inermis'' ''Ceresa lutea'' ''Ceresa pacifica'' ''Ceresa palmeri'' ''Ceresa stimulea'' ''Ceresa tauriniformis ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. ...'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]

	Ceresa Palmeri ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s .... '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' '' Ceresa basalis'' '' Ceresa borealis'' '' Ceresa diceros'' '' Ceresa festina'' '' Ceresa franciscanus'' '' Ceresa inermis'' '' Ceresa lutea'' '' Ceresa pacifica'' '' Ceresa palmeri'' '' Ceresa stimulea'' '' Ceresa tauriniformis'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
picture info	Genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Ceresa Franciscanus ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species. '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' ''Ceresa basalis'' ''Ceresa borealis'' '' Ceresa diceros'' ''Ceresa festina'' '' Ceresa franciscanus'' ''Ceresa inermis'' '' Ceresa lutea'' ''Ceresa pacifica'' ''Ceresa palmeri'' '' Ceresa stimulea'' ''Ceresa tauriniformis ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. ...'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
picture info	Insect Pests Of Temperate Forests Insects (from Latin ') are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (head, thorax and abdomen), three pairs of jointed legs, compound eyes and one pair of antennae. Their blood is not totally contained in vessels; some circulates in an open cavity known as the haemocoel. Insects are the most diverse group of animals; they include more than a million described species and represent more than half of all known living organisms. The total number of extant species is estimated at between six and ten million; In: potentially over 90% of the animal life forms on Earth are insects. Insects may be found in nearly all environments, although only a small number of species reside in the oceans, which are dominated by another arthropod group, crustaceans, which recent research has indicated insects are nested within. Nearly all insects hatch from eggs. Insect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Ceresa Tauriniformis ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s .... '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' '' Ceresa basalis'' '' Ceresa borealis'' '' Ceresa diceros'' '' Ceresa festina'' '' Ceresa franciscanus'' '' Ceresa inermis'' '' Ceresa lutea'' '' Ceresa pacifica'' '' Ceresa palmeri'' '' Ceresa stimulea'' '' Ceresa tauriniformis'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Ceresa Stimulea ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species. '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' ''Ceresa basalis'' ''Ceresa borealis'' '' Ceresa diceros'' ''Ceresa festina'' ''Ceresa franciscanus'' ''Ceresa inermis'' '' Ceresa lutea'' ''Ceresa pacifica'' ''Ceresa palmeri'' '' Ceresa stimulea'' ''Ceresa tauriniformis ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. ...'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Ceresa Palmeri ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s .... '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' '' Ceresa basalis'' '' Ceresa borealis'' '' Ceresa diceros'' '' Ceresa festina'' '' Ceresa franciscanus'' '' Ceresa inermis'' '' Ceresa lutea'' '' Ceresa pacifica'' '' Ceresa palmeri'' '' Ceresa stimulea'' '' Ceresa tauriniformis'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Ceresa Pacifica ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s .... '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' '' Ceresa basalis'' '' Ceresa borealis'' '' Ceresa diceros'' '' Ceresa festina'' '' Ceresa franciscanus'' '' Ceresa inermis'' '' Ceresa lutea'' '' Ceresa pacifica'' '' Ceresa palmeri'' '' Ceresa stimulea'' '' Ceresa tauriniformis'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Ceresa Lutea ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species. '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' ''Ceresa basalis'' ''Ceresa borealis'' '' Ceresa diceros'' ''Ceresa festina'' ''Ceresa franciscanus'' ''Ceresa inermis'' ''Ceresa lutea'' ''Ceresa pacifica'' ''Ceresa palmeri'' ''Ceresa stimulea'' ''Ceresa tauriniformis ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. ...'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Ceresa Inermis ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species. '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' ''Ceresa basalis'' ''Ceresa borealis'' '' Ceresa diceros'' ''Ceresa festina'' '' Ceresa franciscanus'' '' Ceresa inermis'' '' Ceresa lutea'' ''Ceresa pacifica'' ''Ceresa palmeri'' '' Ceresa stimulea'' ''Ceresa tauriniformis ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. ...'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Ceresa Festina ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s .... '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' '' Ceresa basalis'' '' Ceresa borealis'' '' Ceresa diceros'' '' Ceresa festina'' '' Ceresa franciscanus'' '' Ceresa inermis'' '' Ceresa lutea'' '' Ceresa pacifica'' '' Ceresa palmeri'' '' Ceresa stimulea'' '' Ceresa tauriniformis'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Treehopper Treehoppers (more precisely typical treehoppers to distinguish them from the Aetalionidae) and thorn bugs are members of the family (biology), family Membracidae, a group of insects related to the cicadas and the leafhoppers. About 3,200 species of treehoppers in over 400 genera are known.Treehoppers. Dr. Metcalf. NCSU Libraries. North Carolina State University. They are found on all continents except Antarctica; only five species are known from Europe. Individual treehoppers usually live for only a few months. Morphology Treehoppers, due to their unusual appearance, have long interested naturalists. They are best known for their enlarged and ornate pronotum, expanded into often fantastic shapes that enhance their camouflage or mimicry, often resembling Thorns, spines, and prickles, plant th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Ceresa Diceros ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species. '' Ceresa albescens'' '' Ceresa albidosparsa'' '' Ceresa alta'' '' Ceresa ancora'' ''Ceresa basalis'' ''Ceresa borealis'' '' Ceresa diceros'' ''Ceresa festina'' ''Ceresa franciscanus'' ''Ceresa inermis'' ''Ceresa lutea'' ''Ceresa pacifica'' ''Ceresa palmeri'' ''Ceresa stimulea'' ''Ceresa tauriniformis ''Ceresa'', commonly known as buffalo treehoppers, is a genus of treehoppers. It contains about 16 species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. ...'' References Insect pests of temperate forests Smiliinae Auchenorrhyncha genera {{Auchenorrhyncha-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]

Morphology