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Parancistrocerus, the base of the second metasomal tergite is concave, and covered by the posterior lip of the first metasomal tergite, and mites are carried in...

genitalia. In a few of the most primitive insects (the Archaeognatha), the metasomal segments bear small, articulated appendages called "styli", which are...

at the end. The last (5th) metasomal segment does not exceed the length of the preceding (4th) metasomal segment. Metasomal segments are boxy and ornamented...

Nearctic and Neotropical regions. The members of this genus have a long metasomal petiole, like members of the genera Eumenes and Zeta. The following are...

eumenine wasps with a transverse ridge at the bending summit of the first metasomal tergum and with a low and opaque propodeal lamella completely fused to...

bees have a special pouch-like structure on the inside of their first metasomal tergite called the acarinarium where certain mites (Dinogamasus species)...

The holotype has a carapace length of 6.9 mm, a metasomal segment I length of 6.6 mm, a metasomal segment V length of 11.1 mm, a vesicle width of 3...

acting as an acarinarium at the base of the second metasomal tergum and hidden under the first metasomal tergum. This acarinarium serves as shelter for symbiotic...

Ceraphronidae by having a very large stigma in the wing, a relatively constricted metasomal petiole, and three grooves in the mesoscutum. The largest genus within...

compressed bodies and somewhat reduced wing venation. It is common for various metasomal segments to be fused in various ways (often diagnostic for families or...

appearance. Their wings are also quite large and are entirely infuscate. Their metasomal tergum (a portion of the abdomen) and sternum both exhibit erect hairs...

similar looking Delta pyriforme by the presence of a yellow band on the metasomal petiole segment. Female Delta esuriens build a nest of mud with 1-8 cells...

R1 and Rs (it is opposite or apical in Ichneumonidae). In Braconidae, metasomal tergum 2 is fused with tergum 3, (secondarily flexible in Aphidiinae)...

commonly used to refer to the constricted first (and sometimes second) metasomal (posterior) segment of members of the hymenopteran suborder Apocrita (ants...

family Gasteruptiidae, sharing the feature of having the first and second metasomal tergites fused, and having the head on a long pronotal "neck", though...

and more slender bodies with long metasomal segments while females tend to be larger with short, rounded metasomal segments. Males tend to measure around...

males; females have six visible metasomal segments and males usually have only three visible segments. In females metasomal punctures are usually fine, almost...

Cheloninae are small and uniformly colored. They have a characteristic metasomal carapace formed from the fusion of the first three tergites.[citation...

and males bear notable morphological secondary sexual traits including metasomal lamellar or angular protruding structures and hornlike or tusklike mandibular...

Dorsolateral carinae of metasomal segments III to IV are well developed. Dorsum of metasomal segments are mesially granulated. Metasomal segments I to V are...

with granules on the dorsal edge of the carapace. The dorsal side of the metasomal segments are all temperately developed. Three pairs of lateral eyes are...

and males have three visible metasomal segments, while the parnopine males have four. The internally retracted metasomal segments are genital or egg-laying...

wasp-like in appearance. Females in this tribe are unusual in having the last metasomal sternite elongated to form a sheath for the sting, which is remarkably...

patella and manus with similar coloration. Male has very slightly longer metasomal segments than female. Pedipalp movable finger is longer than manus of...

Megaspilidae by having a very small stigma in the wing, a very broad metasomal petiole, and a single median groove in the mesoscutum. The taxon was erected...

buthid scorpions, with rather small pedipalp pincers, moderately thickened metasomal segments and a rather bulbous telson with large stinger. The base of the...

tergites and smooth ventral intercarinal surfaces of metasomal segment IV. Dorsolateral carinae of metasomal segment V are distinct and continuous. Sahyadrimetrus...

Discoverlife.org. Owen, R. E., & Plowright, R. C. (1988). Inheritance of metasomal pile colour variation in the bumble bee Bombus rufocinctus Cresson (Hymenoptera:...

R. romandi workers have been observed to exhibit a behavior called ‘metasomal dragging’. This means that the wasp drags its metasome or gaster, the...

color than females. Males are also smaller and shorter in length. Fifth metasomal segment has a ventral median carina which forks to form a "Y". They have...

or jugal lobes. The first metasomal segment does not have a true node, but can appear like that of the ants. The metasomal sternum of the first segment...

Trigona species, particularly Trigona necrophaga. Setae on the fifth metasomal sternite are thick and diverge laterally. In Trigona crassipes, workers...

the 100° western meridian in the United States and Mexico. The second metasomal segment, with its tergum much larger than its sternum is an outstanding...

antenna arise, and are characterized by various degrees of fusion of the metasomal terga. The family historically included another genus, Szelenyioprioides...

metapleuron mesocoxa metacoxa petiole first gastral tergite or second metasomal tergite Many species in this group have males (or both males and females)...

females in most insects), with very large eyes and with a number of bizarre metasomal modifications. In some places it is common to find heliocausine males...

The body length of the species is 11–13 mm, forewing length 8–9 mm. The metasomal fur bands of both sexes are yellow ochre in colour. The species occurs...

observations of behavior. It is also possible that modifications of the female metasomal tergum VI and gonostyli may represent a unique prey transport mechanism...

asthenes is dark brown to black in color, especially on the tarsi and metasomal segments; the pedipalpal fingertips and the mesosomal tergites are somewhat...

unique feature. The males are also unusual, in the fusion of many of the metasomal segments to form a capsule-like "carapace". Leucospidae are external parasitoids...

respective subspecies but have longer antennae and seven rather than six metasomal segments. The subspecies S. dubia haematodes is colored much like Triscolia...

black, depending on whether metasomal tergite (abdominal segment) 3 is black or not. In the red-tailed color variant, metasomal tergites 2 and 3 are red...

Neotropical regions. Most of its species lack a transverse carina on the first metasomal tergum. A pair of medial pits on the anterior face of the pronotum and...

dorsal anterior thorax, and sometimes yellow on the scutellum. The first metasomal tergum (T1) of the abdomen is all black or black in the middle portion...

Polistes show sexual dimorphism, with males having seven externally visible metasomal segments whereas females have six. This trait is shared with other vespid...

in males. Total length is about 27 to 39 mm. Male has slightly longer metasomal segments and telson as well as wider pedipalp chela than the female. Body...

subgenera. They commonly have prominent bands of hair on the margins of the metasomal segments. Members of this genus are important pollinators of plants, especially...

The hindlegs and pollen baskets are brownish-orange, and the hairs on metasomal tergites 2 and 3 are red. Males are similar in size to female workers...

completely black except for the last four, in females, or last five, in males, metasomal segments, which are bright orange or red and give rise to the common name...

related phylogenetically. The genus is named after the striations on the metasomal segments and its superficial resemblance to Andricus. All species induce...

larval tentacles are absorbed and the juvenile body forms from the larva's metasomal sack. The adult lophophore is created around the mouth, and by growing...

L. (2015). Three new Uroplectes (Scorpiones: Buthidae) with punctate metasomal segments from tropical central Africa. American Museum Novitates 3840...

species, a feature shared only with L. zonulum. Its dull, grainy first metasomal tergum has well-developed punctures separated by 1-1.5 times their width...

presence of their pale fasciae hair bands on the posterior margins of the metasomal terga. In addition, the species is predominantly black or brown-black...

reaches to the base of the gaster. In the males the fusion of many of the metasomal segments to form a capsule-like "carapace". Adults can be found from May...

pronotum having a dorsal carina but lacking a pretegular carina, the first metasomal segment being petiolate but (in dorsal view) not parallel-sided, and the...

Remko Leijs. The specific epithet nitidiventris refers to the shiny black metasomal sterna of both sexes. The body length is 12–15 mm, forewing length 9–10 mm...

Symmorphus species that occur in North America. Viewed from above, the metasomal tergum is narrower than S. albomarginatus or S. canadensis, and it has...

attributes such as pronotal striae, emarginated apices of the seventh metasomal sternum in males, and aedeagal medial lobes, D. norwegica females have...

metasoma, and a very dense, slightly yellow tomentum on the mesosoma, metasomal terga, and head. Male L. vierecki are recognized by their smaller size...

member of the subgenus Polistes (Aphanilopterus), has a narrow first metasomal segment and bright orange antennal segments. Within its range of the eastern...

Eumenes dubius can reach a length of about 13 millimetres. The first metasomal segment is narrow and elongated, creating a "bulbous" appearance to the...

Leptodiaptomus minutus adult females are characterized by a two-segmented urosome, metasomal wings that are nearly symmetrical and rounded, and endopods of leg 5 are...

and legs range from yellowish to reddish-brown, with only a portion of metasomal segment V being black. The femur of the pedipalp typically features 4–5...

and males within each colony. They are identifiable by their obscure metasomal bands, lack of facial maculation, and fulvous thoracic pile. The queen...

from the palearctic region, then the male can be identified on having metasomal segments that are entirely black, the hypopygium (a part of the male reproductive...

flagellomeres, but can be distinguished by the lateral portions of the metasomal tergites being sharply creased beneath the spiracles. Taeger, A.; Liston...

chrysidoid genus and species (Hymenoptera: Chrysidoidea) with striking metasomal structure from the mid-Cretaceous Kachin amber". Palaeoentomology. 6 (5):...

the bee nests. A single species, Roubikia latebrosa, is phoretic in the metasomal acarinarium of the host. Dispersal to unrelated host bees can be accomplished...

with subaculear tooth which is pointed or rounded. Males have longer metasomal segments and a wider pedipalp chela manus than females. Reddyanus aareyensis...

blotched yellowish-brown in coloration with a smooth and glossy fifth metasomal segment and a notably long telson, or stinger. Its pectens have 14–18...

on thorax, small spots at the base of the front wings and wing stigma. Metasomal terga III–IV show apical bands. In the females the spot between antennal...

specific epithet griseocincta refers to the greyish hair bands on the metasomal terga. The body length is 16–17 mm, forewing length 10–11 mm, head width...

punctation on the first metasomal tergite, while the larger species group, including A. krampus has a punctate to very punctate first metasomal tergite. Both A...

glossy with some marginal granules. Dorsal and dorsolateral carinae of metasomal segments are smooth. The telson vesicle is longer than the aculeus. A...

Legs, known as the metasomaa, are yellowish. Dorsal keels on fourth metasomal segments lack discrete denticles. This species is native to Eritrea, Ethiopia...

to the petiole with an elongated and enlarged connection on the second metasomal segment, while the petiole has a node in the middle. A number of large...

and the dorsal section of the scape is black. Regarding the body, the metasomal tergites are covered with long straight hair, the black central region...

well-developed propleural arm. The mesothorax is larger than the other metasomal segments. The mesonotum consists of 2 parts which are divided by the scuto-scutellar...

Andrena by the following characteristics in both sexes: the scutum and metasomal terga are coarsely punctate and the forewing possesses three submarginal...

Eulophidae, Tetrastichinae) from Thailand: the first eulophid with a metasomal carapace". Journal of Hymenoptera Research. 98: 499–507. doi:10.3897/jhr...

Robert Brooks. The species is known only from the female holotype. It has metasomal terga with black fur and white posterior hair bands. The species occurs...

eumenine wasps has a transverse ridge at the bending summit of the first metasomal tergum and a low and opaque propodeal lamella completely fused to the...

are distinguished by their three-segmented urosome; pointed, triangular metasomal wings with minute sensilla; and the genital segment without obvious lateral...

pale yellow, and female pedipalps don't exhibit dark spots. The dorsal metasomal carinae is missing in females, a characteristic present only in this species...

of half an hour, new tentacles appear and the body is transformed. The metasomal sac protrudes from the ventral surface and turns inside out, with the...

wasps have variable coloration. "In both sexes, the head, scapulae, and metasomal tergites may be [entirely black or marked with red]" or orange. Scolia...

gaster is attached to the petiole with a narrow connection on the second metasomal segment, while the petiole is narrow and tall. A large sting is present...

with 4 distal and 11 oblique granule rows. The ventrolateral carinae of metasomal segment V have large and rounded granules. The anal arch has 6 small lobes...

distinguished by their two-segmented urosome and asymmetrical, rounded metasomal wings. Males are characterized by a large lateral spine on leg 5, located...

Some can be recognized by distinctive scalloped sculpturing of their metasomal tergites. Adults of many species are iridescent. Reviewed in 2024. Asparagobius...

longitudinal striae. The inner metatibial spurs are very finely ciliate. Metasomal terga 1-5 and sterna 1-6 are lightly shagreened and shiny. The terga show...

fringe hairs of the northeastern sweat bee is about the same length as the metasomal hairs. Two to four puncture widths separate the terga. It can be primarily...

wing with distal abscissa of 2/Cu entirely absent; epipleurum of third metasomal tergite separated by a crease just below the spiracle; mid tibia with...

sparsely hirsute, with a granulated mesosoma and carapace and a seventh metasomal segment. The telson is granulated and very bulbous. The chelae are very...

specific epithet fulvescens (Latin: “becoming golden”) alludes to the bees’ metasomal pubescence. The body length of females is 18 mm. The species occurs in...

The middle section on their back is mostly light or pale. The first metasomal tergum, or back, with subhorizontal dorsal surface rounds into the anterior...

Alison Cockerell. The body length is 12–13 mm; the eyes are not hairy; the metasomal bands are indistinct. The species occurs in coastal areas of south-eastern...

Like all Chelonines, the first two (sometimes the first three or four) metasomal terga are fused, and terga six and seven lack spiracles. Features which...

antenna are dark brown while the tegula is translucent brown and the metasomal tegra are dark brown with weak metallic green highlights. The legs are...

13–14 mm. The eyes are hairy. Colouration is mainly black, with silver-white metasomal bands, and with reddish-brown hair. The species occurs in inland eastern...

distinguished from other species of Thyreus in the region by its sixth metasomal tergum (that is, the sixth segment of the posterior part of its body)...

dimorphic, with males having a longer total body length in addition to longer metasomal segments and an enlarged telson. Coloration is also partially determined...

Cockerell. The body length is about 14 mm; the eyes are not hairy; the metasomal bands are wide and bright gold in colour. The species occurs in southern...

It is a small and slender wasp with short palpi and fused 2nd and 3rd metasomal segments. This genus has a holarctic distribution. Hybrizon is unusual...

pygmaea. (a) a carapace, (b) the holotype, nearly complete operculum, (c) metasomal tergites and telson, (d) metastoma and (e) a specimen with complete mesosoma...

receptacle retractors, circular and longitudinal musculature under the metasomal (trunk) tegument, and a single muscular layer beneath the proboscis wall...

wings are slightly cloudy at the apices and glassier at the bases. The metasomal segment the first tergum is densely covered in long, white hairs. There...

pronotal angle, the partially and sculpturing of the face, mesosoma, and metasomal terga are unique. Engel, M.S. (1995). "New Augochlorine Bees (Hymenoptera:...

size of R. problematicus compared to R. basilicus. Additionally, the metasomal segments of R. problematicus are shorter and broader in comparison. These...

as very similar to P. annularis, with which it shares a slender first metasomal segment. It can be distinguished from this species by the yellow spot...

with two denticles on ventrum. Carapace is granular without carinae. Metasomal segments IV to V are punctate without a developed carinae. Telson vesicle...

fulviventris and T. f. guianae, can be distinguished by differences in metasomal coloration. T. f. fulviventris metasoma are rust-colored with some differences...

‘3-toothed’) is an anatomical reference to the 3-pointed margin of the 6th metasomal tergum of the female. The body length of males is 4.5–4.9 mm, that of...

unconfirmed. Females also often have large numbers of nematodes in their metasomal glands. The larvae of a parasitic fly, Fiebrigella sp., consume the pollen...

hair on its mesosoma, long, plumose, and golden hair on its metanotum, metasomal terga, and metasoma, white, short, and fine hair on its tegula, white...

groups based on a distinctive feature: the form of the apex of the 8th metasomal sternum of males. Hylaeus agilis and H. capitosus have a rounded apex...

12 mm. The eyes are hairy. Colouration is mainly black, with broad silver metasomal bands. The species occurs in south-west Western Australia. The type locality...

hair on its mesosoma, long, plumose, and golden hair on its metanotum, metasomal terga, and metasoma, slightly yellow, short, and fine hair on its tegula...

very small wasps. They are similar to small microgastrines but the first metasomal segment is highly flattened with the spiracle on the median rather than...

gaster is attached to the petiole with a broad connection on the second metasomal segment, while the petiole is generally stalk shaped. A sting is present...

are comparable in length. Queens typically have longer wings and larger metasomal segments. It is suggested that reproductive ability may be possible in...

granular, with one clearly visible carina. Sternites are without carinae. Metasomal segments IV and V are punctate without a developed carinae. The pectines...

abdominal spikes were present in the last segment of the mesosoma and all the metasomal segments. Compared to other species, A. kamyshtensis is most similar to...

hairy. Colouration is mainly black, with narrow, brown-edged, silver metasomal bands. The species occurs in eastern Australia on the tablelands and slopes...

(1/M) of vein M (basal vein) of the fore wing and in females by having metasomal tergum 6 hidden beneath tergum 5”. L. mataroa can be likened to the L...

coloration. The presence of a pygidial plate bordered by setae on the fifth metasomal tergum supports the placement into the Halictidae subfamily Halictinae...

at the apex of the scales. Smaller scales alongside the edges of the metasomal tergites were also brown but contrasted against the lighter brown of the...

Houston. The specific epithet setosa (Latin: ‘bristly’) refers to the metasomal setae. The body length of males is 3.8–4.7 mm, that of females 4.3–5.5 mm...

separated tufts of hair without any obvious tubes or slits on the second (metasomal) sternum. Limited to mainland Tropical America, E. imperialis range from...

chrysidoid genus and species (Hymenoptera: Chrysidoidea) with striking metasomal structure from the mid-Cretaceous Kachin amber". Palaeoentomology. 6 (5):...

ephialtitids elucidating the origin and transformation of the propodeal-metasomal articulation in Apocrita (Hymenoptera)". BMC Evolutionary Biology. 15...