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Sex-specific adaptations
opposite of dimorphism is monomorphism, when both biological sexes are phenotypically indistinguishable from each other. Reversed sexual dimorphism (RSD) is
Sexual_dimorphism
Topics referred to by the same term
Look up dimorphism in Wiktionary, the free dictionary. Dimorphism or dimorphic may refer to: Dimorphic root systems, plant roots with two distinctive
Dimorphism
Birds of the order Charadriiformes
between males and females, also known as sexual dimorphism. In shorebirds, various sexual dimorphism is seen, including, but not limited to, size (e.g
Wader
Family of birds
large size dimorphism, with females being larger than males. Conversely, the Lesbiini clade (coquettes) displays very little size dimorphism; males and
Hummingbird
Group of crustaceans
Crabs are decapod crustaceans, either the Brachyura (the "true crabs") or various groups within the closely related Anomura (hermit crabs and allies),
Crab
Birds from the order Strigiformes
population, and sexual dimorphism on the character, as an evolutionary "distance" between the sexes. "Phylogenetic rule of sexual dimorphism" states that if
Owl
Trait that determines an organism's sexually reproductive function
sex differ in size and appearance, a phenomenon called sexual dimorphism. Sexual dimorphism in animals is often associated with sexual selection: the mating
Biological_sex
Paraphyletic group of birds
(raptors) are known to display patterns of sexual dimorphism. It is commonly believed that the dimorphisms found in raptors occur due to sexual selection
Bird_of_prey
Long, pointed tooth in mammals
they are sometimes hidden or completely absent. Animals showing this dimorphism include antelopes, musk-deer, camels, horses, wild boar, some apes, seals
Canine_tooth
differential exposure to gonadal sex hormones during development. Sexual dimorphism is a term for the phenotypic difference between males and females of the
Sex differences in human physiology
Sex_differences_in_human_physiology
Differences between male and female animals
exhibit the highest levels of sexual size dimorphism. Pinnipeds offer an illustration for this. Sexual size dimorphism is the difference in body size between
Sexual dimorphism in Carnivorans
Sexual_dimorphism_in_Carnivorans
Family of spiders
and in automobiles. Some tarantula species exhibit pronounced sexual dimorphism. Males tend to be smaller (especially their abdomens, which can appear
Tarantula
Class of mollusks
ISSN 0025-3162. S2CID 85256742. Saunders, W.B; Spinosa, C. (1978). "Sexual dimorphism in Nautilus from Palau". Paleobiology. 4 (3): 349–358. Bibcode:1978Pbio
Cephalopod
Crocodilian native to the Southeastern United States
specimens, the sexual dimorphism in size of the American alligator is relatively modest among crocodilians. For contrast, the sexual dimorphism of saltwater crocodiles
American_alligator
Ability of a solid material to exist in more than one form or crystal structure
media related to Polymorphism. Allotropy Isomorphism (crystallography) Dimorphism (Wiktionary) Polyamorphism Disappearing polymorphs Chemical crystallography
Crystal_polymorphism
Differences between male and female animals
Retrieved 13 August 2013. Sampson (2001). "Sexual Dimorphism". p. 269. Sampson (2001). "Sexual Dimorphism". p. 270. Maiorino, Leonardo; Farke, Andrew A.;
Sexual dimorphism in dinosaurs
Sexual_dimorphism_in_dinosaurs
Family of land turtles
Tortoises (/ˈtɔːrtəs.ɪz/ TOR-təs-iz) are reptiles of the family Testudinidae of the order Testudines (Latin for "tortoise"). Like other testudines, tortoises
Tortoise
Order of mammals
the expression of the dimorphism among primates and the fundamental causes of sexual dimorphism. Primates usually have dimorphism in body mass and canine
Primate
Species of bird
The cockatiel (Nymphicus hollandicus), also known as the weero/weiro or quarrion, is a species of small- to medium-sized parrot belonging to the cockatoo
Cockatiel
Area of the brain below the thalamus
in many species, adult males are visibly distinct sizes from females. Dimorphism is also found in physiological and behavioral responses to ovarian steroids
Hypothalamus
Bony structure that forms the head in vertebrates
The skull, or cranium, is typically a bony enclosure around the brain of a vertebrate. In some fish and amphibians, the skull is of cartilage. The skull
Skull
Form of human sexual intercourse
Part of a series on Biological sex Biological terms Sexual dimorphism Sexual differentiation Feminization Virilization Sex-determination system XY XO ZW
Penile–vaginal_intercourse
However, they are based on a series of different sexual dimorphism measures, or indices. Sexual dimorphism, in most works, is measured on the assumption that
Sexual_dimorphism_measures
Natural history of mating systems in which species pair bond to raise offspring
two sexes emerge the dimorphism in the gamete structures and sizes may lead to further dimorphism in the species. Sexual dimorphism is often caused through
Monogamy_in_animals
Difference between males and females
influenced indirectly (e.g., hormonally) by the Y-chromosome. Sexual dimorphism is a term for the genotypic and phenotypic differences between males and
Sex_differences_in_humans
amounts of calcium during pregnancy and lactation may be related to the dimorphism. Breastfeeding newborns, whose skeletons are growing, require high amounts
Human_skin_color
Frond dimorphism refers to a difference in ferns between the fertile and sterile fronds. Since ferns, unlike flowering plants, bear spores on the leaf
Frond_dimorphism
Biological differences between men and women in human relationships
Sexual dimorphism in human bonding refers to the sex-based differences in how humans form, maintain, and experience social and emotional bonds, including
Sexual dimorphism in human bonding
Sexual_dimorphism_in_human_bonding
Family of spiders
can be in size. Araneids often exhibit size dimorphism typically known as extreme sexual size dimorphism, due to the extent of differences in size. The
Orb-weaver_spider
Tribe of birds
The phenotypic difference between males and females is called sexual dimorphism. Male grouse tend to be larger than female grouse, which seems to hold
Grouse
macronucleus and micronucleus. Nuclear dimorphism is subject to complex epigenetic controls. Nuclear dimorphism is continuously being studied to understand
Nuclear_dimorphism
Sexual differences in primates
reverse dimorphism, a phenomenon in which females are larger than males. Canine sexual dimorphism is one particular type of sexual dimorphism, in which
Sexual dimorphism in non-human primates
Sexual_dimorphism_in_non-human_primates
Family of spiders
types of sexual dimorphism have been recorded in crab spiders. Some species exhibit color dimorphisms; however, the most apparent dimorphism is the difference
Thomisidae
Species of fish
Systomus orphoides, is a species of cyprinid fish native to Southeast Asia. It can reach a length of 21 centimetres (8.3 in) SL. It is closely related
Systomus_orphoides
Species of praying mantis
Phyllocrania paradoxa, common name ghost mantis, is a small species of mantis from Africa remarkable for its leaf-like body. It is one of the three species
Phyllocrania_paradoxa
Species of bird
patch on their white breast. Males and females exhibit marked sexual dimorphism. Breeding habitat consists of cool-temperate open deciduous woods throughout
Rose-breasted_grosbeak
Suborder of fishes
zone which they inhabit. The deep-sea anglerfishes have extreme sexual dimorphism; the males are many times smaller than the females. To reproduce, a male
Ceratioidei
Superfamily of beetles
the dimorphism is not attributed to sexual selection. It is a response to ecological demands of egg deposition. Another example of extreme dimorphism in
Weevil
Extinct clade of armored dinosaurs
clubbing device. There have been several findings of possible sexual dimorphism in stegosaurids. Saitta (2015) presents evidence of two morphs of Hesperosaurus
Stegosauria
Mechanism of evolution involving male gamete competition and cryptic female choice
cases of sexual dimorphism in plant architecture and flower production in some species. Below are some specific examples of sexual dimorphisms in flowering
Sexual selection in flowering plants
Sexual_selection_in_flowering_plants
Species of fish
Betta antoni is a species of gourami endemic to the Sanggau area in the Kapuas region. The species name antoni is named after Irwan Anton "in recognition
Betta_antoni
2001 studio album by ...and Oceans
A.M.G.O.D. (Allotropic/Metamorphic Genesis of Dimorphism) is the third studio album by Finnish industrial black metal band ...and Oceans. This album incorporates
A.M.G.O.D. (Allotropic/Metamorphic Genesis of Dimorphism)
A.M.G.O.D._(Allotropic/Metamorphic_Genesis_of_Dimorphism)
Species of bird
Africa. It is an intra-African migrant and displays remarkable sexual dimorphism in the breeding season. Their preferred habitat south of the equator is
Pennant-winged_nightjar
Species of stag beetle
often act differently from one another, often as a result of their sexual dimorphism. The males have different mandible sizes, a common trait amongst stag
Dorcus_hopei
Species of bird
around the same level of sexual dimorphism by body mass as the martial eagle which show about half as much linear dimorphism. Besides being larger, females
Martial_eagle
Species of bird
The Abyssinian scimitarbill (Rhinopomastus minor) is a species of bird in the family Phoeniculidae. The term Abyssinia, is an old name for the region of
Abyssinian_scimitarbill
Bony fish with a natural lure
sexual dimorphism, which is sometimes extremely pronounced; the females may be several orders of magnitude larger in mass than males. This dimorphism has
Anglerfish
Identification of the sex of animals
using simple polymerase chain reaction product size dimorphism, presence/absence, restriction dimorphism, or even sequencing. Nuclear sexing Ammer, F. K.;
Sexing
Genus of birds
cock-of-the-rock is the national bird of Peru. Both known species exhibit sexual dimorphism: the males are bright orange or red with a prominent fan-shaped crests
Cock-of-the-rock
Family of dinosaurs including Triceratops and relatives
1186/1472-6785-13-14. PMC 3637170. PMID 23557203. "Sexual Dimorphism", Sampson (2001); page 269. "Sexual Dimorphism", Sampson (2001); page 270. Brown, Caleb M. (2018-01-16)
Ceratopsidae
Method of determining sex
Part of a series on Biological sex Biological terms Sexual dimorphism Sexual differentiation Feminization Virilization Sex-determination system XY XO ZW
XY_sex-determination_system
Species of fish
Astyanax argentatus is a species of freshwater ray-finned fish belonging to the family Acestrorhamphidae, the American characins. This fish is found in
Astyanax_argentatus
Sexual selection mechanism
expressed by a particular sex. Extreme and (seemingly) maladaptive sexual dimorphism represented a paradox for evolutionary biologists from Charles Darwin's
Fisherian_runaway
Species of lizard
The Santa Cruz lava lizard (Microlophus indefatigabilis) is a species of lava lizard endemic to the Galapagos island of Santa Cruz. Endemic to Santa Cruz
Microlophus_indefatigabilis
Biological rule concerning sexual size dimorphism
between the extent of sexual size dimorphism and which sex is larger. Across species within a lineage, size dimorphism increases with increasing body size
Rensch's_rule
Genus of wasps
Megaphragma is a genus of wasp in the family Trichogrammatidae. It contains some of the smallest known insects, Megaphragma caribea (170 μm) and Megaphragma
Megaphragma
Mechanism of sexual selection
spotted newts. Charles Darwin (1871) first explored the concept of "sexual dimorphism" which states that, "most sexually dimorphic species are also the most
Scramble_competition
Species of crab
Leptograpsodes octodentatus, known as the burrowing shore crab, is a species of crab in the superfamily Grapsoidea, It is the only species in the genus
Leptograpsodes
Species of fish
Deuterodon heterostomus is a small species of characin endemic to a large river system in southeast Brazil. It was originally the only member of the genus
Deuterodon_heterostomus
Genus of birds
The true koels, Eudynamys, are a genus of cuckoos from Asia, Australia and the Pacific. They are large sexually dimorphic cuckoos that eat fruits and insects
Koel
Species of spider
sexual selection. One explanation for the dimorphism observed in the N. pilipes species is sexual size dimorphism may have evolved due to selection favoring
Nephila_pilipes
Species of cephalopods
Ocythoe tuberculata, also known as the tuberculate pelagic octopus or football octopus, is a pelagic octopus. It is the only known species in the family
Ocythoe
Pheromone signaling structures in lepidopteran males
Hair-pencils and coremata are pheromone signaling structures present in lepidopteran males. Males use hair-pencils in courtship behaviors with females
Hair-pencil
Species of moth
Spirama helicina is a moth of the family Erebidae first described by Jacob Hübner in 1824. In older texts, the species was classified as morph of Spirama
Spirama_helicina
Species of fish
Allotoca goslinei, commonly known as the banded allotoca or tiro rayado in Spanish, is a species of fish in the family Goodeidae. First described in 1987
Allotoca_goslinei
Sexual reproduction involving a large, female gamete and a small, male gamete
attract the swimming sperm cells. Anisogamy is a core element of sexual dimorphism that helps to explain phenotypic differences between sexes. Researchers
Anisogamy
Genus of bees
Augochlorella is a genus in the bee family Halictidae, commonly called sweat bees. They display metallic coloration, ranging from reddish to gold to bluish
Augochlorella
Species of spider
Anasaitis canosus, previously of the genus Corythalia, is a small jumping spider that can typically be found atop leaf-litter or man-made structures such
Anasaitis_canosus
Haploid sex cell
Part of a series on Biological sex Biological terms Sexual dimorphism Sexual differentiation Feminization Virilization Sex-determination system XY XO ZW
Gamete
Species of crab
Pugettia producta, known as the northern kelp crab or shield-backed kelp crab, is a species of crab in the family Epialtidae. Its upper carapace is typically
Pugettia_producta
Species of fish
Astyanax asuncionensis is a small species of freshwater fish described in 1972 from Asunción, the capital of Paraguay in South America. Its specific epithet
Astyanax_asuncionensis
Extinct genus of birds
than one species. Dinornis seems to have had the most pronounced sexual dimorphism of all moa, with females being up to twice as tall and three times as
Dinornis
Species of fish
The black marlin (Istiompax indica) is a species of marlin found in tropical and subtropical areas of the Indian and Pacific Oceans approximately between
Black_marlin
Evolutionary effects of sexual selection on humans
scientific explanation for the evolution of pigmentary traits. Sexual dimorphism suggests the presence of sexual selection. The earliest homininae were
Sexual_selection_in_humans
Species of fish
The keyhole cichlid (Cleithracara maronii) is a cichlid fish endemic to tropical South America, occurring in the lower Orinoco Basin in Venezuela and river
Keyhole_cichlid
Species of bird
The chestnut-breasted quail-thrush (Cinclosoma castaneothorax) is a small endemic Australian bird which is predominantly found within the semi-arid deserts
Chestnut-breasted quail-thrush
Chestnut-breasted_quail-thrush
Species of mammal
55 to 77 cm (22 to 30 in) long and weighs up to 16 kg (35 lb). Sexual dimorphism has been recorded in this species, with males being larger and heavier
Honey_badger
Extinct clade of dinosaurs
the dome shape in the adult stage. It could also be evidence of sexual dimorphism with the female being more flat-headed. Ceratopsians, or "horned-faces"
Marginocephalia
Species of bee
The Oriental carpenter bee, Xylocopa nasalis, or Xylocopa (Biluna) nasalis, is a species of carpenter bee. It is widely distributed in Southeast Asian
Xylocopa_nasalis
Species of fish
Astyanax brevirhinus is a species of freshwater ray-finned fish belonging to the family Acestrorhamphidae, the American characins. This fish is known only
Astyanax_brevirhinus
Species of annelid worm
Polychaeta, phylum Annelida) noted for displaying exceptional sexual dimorphism and for the biocidal properties of a pigment in its skin. The species
Bonellia_viridis
Extinct genus of hominins
more recent analysis based on canine size and lack of canine sexual dimorphism indicates that Ardipithecus was characterised by reduced aggression, and
Ardipithecus
of Hippopotamus antiquus and reporting evidence of significant sexual dimorphism in mandibles of specimens from Maglianella (Italy). Radović et al. (2026)
2026_in_paleomammalogy
Species of beetle
coleopterology, giraffe weevils are of interest because they exhibit sexual dimorphism. There are other beetle species that share the common name giraffe weevil
Giraffe_weevil
Aspect of cell biology
Phenotypic switching is switching between multiple cellular morphologies. David R. Soll described two such systems: the first high frequency switching
Phenotypic_switching
Species of fish
Pelvicachromis pulcher is a freshwater fish of the cichlid family, endemic to Nigeria and Cameroon. It is popular amongst aquarium hobbyists, and is most
Pelvicachromis_pulcher
morphology during its life history, and report possible evidence of sexual dimorphism. Rotatori et al. (2026) study the phylogenetic relationships of iguanodontian
2026 in archosaur paleontology
2026_in_archosaur_paleontology
Group of neurons
sexual dimorphism between species. Although sexual dimorphism of Onuf's nucleus is present in all species, the extent of the sexual dimorphism varies
Onuf's_nucleus
Ratio of lengths of fingers
sexual dimorphism evident after birth, adults were found to demonstrate more dimorphism than children, who show the same extent of dimorphism as fetuses
Digit_ratio
American bulldog breed
blue, buff or brown patches, and its tail is kept un-docked. Sexual dimorphism is common in the breed, with male dogs being typically twice the weight
Alapaha_Blue_Blood_Bulldog
Genus of roundworms
Pristionchus is a genus of nematodes (roundworms) in the family Diplogastridae that currently includes more than 50 described species. They are known mainly
Pristionchus
Evolutionary process
However, the fact that Ar. ramidus shares with bonobos reduced sexual dimorphism, and a more paedomorphic form relative to chimpanzees, suggests that the
Human_evolution
Species of ray-finned fish
making this species an interesting model of partial migration or migratory dimorphism, and studies have been conducted to understand this better, including
Coilia_nasus
Species of owl
owl shows reverse sexual dimorphism relative to most non-raptorial birds in that females are larger than males. Sexual dimorphism that favors the female
Snowy_owl
Order of mammals
insulating layer of blubber helps maintain their body temperature. Sexual dimorphism is the condition where sexes of the same species exhibit different morphological
Carnivora
Species of fish
Deuterodon oyakawai is a small species of characin endemic to a large river basin along the Atlantic coast in southeast Brazil. It was originally one of
Deuterodon_oyakawai
Species of crab
and wide-ranging mobility that spans the mangrove/upland ecotone Sexual dimorphism is evident in the species, as males are typically slightly larger and
Armases_cinereum
Species of bird
Demerara hen. Male and Female show no dimorphism.
Fiery-shouldered_parakeet
Genus of rhamphorhynchid pterosaur from the Late Jurassic
ratio, and interpreted them as different sexes. Bennett tested for sexual dimorphism in Rhamphorhynchus by using a statistical analysis, and found that the
Rhamphorhynchus
Extinct genus of reptiles
Maiasaura (from Greek: μαῖα, lit. 'good mother' and Greek: σαύρα, the feminine form of saurus, lit. 'reptile') is a large herbivorous saurolophine hadrosaurid
Maiasaura
DIMORPHISM
DIMORPHISM
DIMORPHISM
DIMORPHISM
Girl/Female
American, British, Christian, English, Gaelic, German, Irish
Dark Haired One; Ruler; County in Ireland; Dusky; Dark
Girl/Female
American, Arabic, British, English, Farsi, Indian
Adventurous; Wise; Intelligent; Wanderer; Glorified
Girl/Female
Tamil
Varshita | வரà¯à®·à¯€à®¤à®¾
Rain, Beautiful
Boy/Male
Indian, Sanskrit
The King of the Forest; The Lion
Boy/Male
Bengali, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit
Indra
Boy/Male
Hindu
God gift, Broad, Spacious
Boy/Male
Gujarati, Hindu, Indian, Kannada, Punjabi, Sikh, Telugu
God's Light
Surname or Lastname
English
English : variant of Kay.
Surname or Lastname
English
English : variant of Higginbotham.
Girl/Female
Latin
Marvelous.
DIMORPHISM
DIMORPHISM
DIMORPHISM
DIMORPHISM
DIMORPHISM
a.
Having the property of dimorphism; dimorphous.
n.
Difference of form between members of the same species, as when a plant has two kinds of flowers, both hermaphrodite (as in the partridge berry), or when there are two forms of one or both sexes of the same species of butterfly.
n.
The possession, in one species of plants, of only one kind of flowers; -- opposed to heteromorphism, dimorphism, and trimorphism.
n.
The coexistence among individuals of the same species of three distinct forms, not connected, as a rule, by intermediate gradations; the condition among individuals of the same species of having three different shapes or proportions of corresponding parts; -- contrasted with polymorphism, and dimorphism.
n.
Crystallization in two independent forms of the same chemical compound, as of calcium carbonate as calcite and aragonite.
a.
Characterized by dimorphism; occurring under two distinct forms, not dependent on sex; dimorphic.
n.
The property of crystallizing under two or more distinct fundamental forms, including dimorphism and trimorphism.