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Posterior body part or shield of crustaceans and some other arthropods
The pygidium (pl.: pygidia) is the posterior body part or shield of crustaceans and some other arthropods, such as insects and the extinct trilobites.
Pygidium
Class of extinct, Paleozoic arthropods
based on the pygidium being micropygous (pygidium smaller than cephalon), subisopygous (pygidium sub equal to cephalon), isopygous (pygidium equal in size
Trilobite
Extinct species of fish
Rhizosomichthys Bathophilus Miles, 1942 Bathypygidium Whitley, 1947 Of Rhizosomichthys totae Pygidium totae Miles, 1942 Trichomycterus totae (Miles, 1942)
Rhizosomichthys
Marine arthropods that lived during the late Ordovician
trilobite. It has a headshield (or cephalon) wider than the tailshield (pygidium), and in between them three thoracic body segments (somites). The known
Soomaspis
Species of fish
Hatcheria macraei (Girard, 1855) Synonyms Thrichomycterus macraei Girard, 1855 Pygidium burmeisteri Berg, 1895 Hatcheria patagoniensis C. H. Eigenmann, 1909 Hatecheria
Hatcheria
Frontal part of an animal's body, between its head and abdomen
organs such as antennae, a thorax of multiple similar segments (that in some species allowed them to roll up into a ball), and a pygidium, or tail section.
Thorax
Family of arthropods (fossil)
semi-circular headshield (cephalon), and a circular to long oval tailshield (pygidium) equal to or longer than the cephalon, without any body segments in between
Naraoiidae
Extinct genus of bivalved arthropod
depending on the specimen, while the pygidium had either 11-13 or 20 segments. The segments of the thorax and pygidium had pairs of thin filamentous biramous
Pakucaris
Extinct genus of trilobites
the pygidium (the tail) is smooth and very rounded. It is isopygous - that is, the pygidium is about the same size as the cephalon. The pygidium completely
Bumastus
Extinct genus of arthropods
tailshield (pygidium) longer than the cephalon, without any body segments in between. The body is narrowed at the articulation between cephalon and pygidium. The
Naraoia
Extinct order of trilobites
The thorax is usually much longer than the pygidium, which is usually small. In some species the pygidium is outlined with a flat border. The Subclass
Ptychopariida
Clade of arachnids
and forms a pedicel, while the last three are constricted, forming the pygidium. The last segment bears a whip-like tail or flagellum, consisting of 30–40
Thelyphonida
Extinct genus of trilobites
rocks from Algeria and Morocco. Originally described from an isolated pygidium (the posterior body part or shield), the first complete articulated specimen
Erbenochile
and a medium pygidium with well-impressed furrows. Complete specimens have never reached the size of 7 cm predicted by the largest pygidium found. Bathyuriscus
Bathyuriscus
Extinct order of arthropods
number of families. As a group, agnostids are isopygous, meaning their pygidium is similar in size and shape to their cephalon. Most agnostid species were
Agnostida
Extinct species of trilobite
by an unusual net-like pattern of furrows on both the cephalon and the pygidium. Like all members of the suborder Agnostida, Glyptagnostus reticulatus
Glyptagnostus_reticulatus
Species of beetle
length of about 20 mm (0.79 in). They are brown and shiny, with the elytra, pygidium and abdomen yellow. The head is coarsely and densely punctate, weakly impressed
Amphitrichia_moana
Species of beetle
rufula, but somewhat darker in colour, and differs in the sculpture of the pygidium. The head and pronotum are blackish and the elytra brown with a violet
Rufotrichia_sororia
Species of beetle
98 in). They are black and shiny, the elytra with a purple shimmer. The pygidium and abdomen are brown. They are very similar to Sophrops iridescens, but
Rufotrichia_montana
Species of beetle
pronotum, scutellum, pro- to metasterna and legs dark brown, and the elytra, pygidium and abdomen brighter brown. The dorsal surface is weakly shining. The species
Amphitrichia_bicallosicephala
Extinct genus of trilobites
19–21 segments and adorned with longish, recurved pleural spines. Its pygidium was comparatively small. Paradoxides is a characteristic Middle-Cambrian
Paradoxides
Species of beetle
body is black, glabrous and shiny, with the pronotum, propygidium and pygidium black and the abdomen brownish. The species is dedicated to Robert Ducarme
Calometopidius_ducarmei
Species of beetle
either on the pronotum, elytra, pygidium, or abdomen, and the hairs covering the head and pronotum, elytra, pygidium, and abdomen are black. The legs
Anisonyx_nasuus
Extinct genus of trilobites
segments, with the relatively large pygidium with a slender axis of 11 to 16 rings and 6 or 7 pleural ribs. The pygidium ends in a striking tail spike. Some
Dalmanites
helmetiid arthropod closely related to trilobites, notable for its crown-like pygidium (tail shield) that inspired its species name. It belongs to the extinct
Haifengella
Extinct genus of trilobites
a large glabella, and a medium-sized pygidium, but also a lack of the strong interpleural furrows on the pygidium that Olenoides has. Bathyuriscus (Kootenia)
Kootenia
Extinct genus of trilobites
section. Lonchodomas has five thorax segments and the pleural area of the pygidium has two narrow furrows. Lonchodomas occurred in what are today Argentina
Lonchodomas
Species of beetle
punctures. Flat, smooth ribs are only very indistinctly marked. In males, the pygidium is not very densely covered with coarser or weaker punctures across its
Melanocamenta_inflata
Extinct genus of artiopodan
and flap-shaped exopods (upper branches). The body terminates with a pygidium. Thulaspsis has been consistently recovered as more closely related to
Thulaspis
Fossil flora and fauna of the Burgess Shale
a large glabella, and a medium-sized pygidium, but also a lack of the strong interpleural furrows on the pygidium that Olenoides has. Ogygopsis Arthropoda
Paleobiota of the Burgess Shale
Paleobiota_of_the_Burgess_Shale
Extinct genus of trilobites
axial and pleural lobes of the pygidium are poorly defined, with a shallow furrow dividing the border of the pygidium from the central portion. The border
Isotelus
Species of beetle
punctures being more widely spaced on the distinctly prominent ribs. The pygidium is yellow with scattered punctures. The underside is brown and the abdomen
Amphitrichia_sulana
Species of beetle
The elytra and pygidium have a rather dense punctation. The punctures on the elytra with small setae, while the punctures on the pygidium are covered with
Entypophana_lujai
Species of beetle
The head and legs are shiny, while the pronotum, scutellum, elytra and pygidium are dull. There are several pale yellow chalky spots on the body. The species
Paratrichius_danghaidangi
Body segment of an annelid worm containing the mouth and sometimes feeding palps
joint structure of a peristomial ring and a tentacular crown. Prostomium Pygidium Beesley, Pamela; Graham J. B. Ross; Christopher J. Glasby (2000). Polychaetes
Peristomium
Extinct order of trilobites
thoracic segments tend to become more and more forward directed toward the pygidium. The eyes are typically large. Pygidia are typically large, competing in
Corynexochida
Genus of trilobites
shield), a thorax with seven jointed parts, and finally a semicircular pygidium. Its antennae were long, and curved back along its sides. Its thin legs
Olenoides
Extinct species of trilobite
fossil in biostratigraphy. Lejopyge laevigata exhibits a cephalon and pygidium that are smooth and almost featureless (effaced). Both possess axial furrows
Lejopyge_laevigata
Species of beetle
punctured, while the interstitia show moderately dense punctation. The pygidium is covered with sparsely spaced umbilical punctures. The thorax is covered
Holotrichia_seticollis
Order of trilobites
more than 10, and Damesellidae odontopleurids having no more than 13. The pygidium tends to be very small, and invariably has long spines emanating from it
Odontopleurida
Genus of trilobites
radially. In contrast to the genus Scutellum with a pygidium with distinct furrows, in Paralejurus the pygidium was very smooth and strongly fused. Fossils (Smithsonian
Paralejurus
Species of beetle
the pygidium than on the abdomen. Females are exactly like the males, but a little more robust. They can be distinguished by the shape of the pygidium only
Platychelus_semivirgatus
Genus of trilobites
developed eye ridges, medium-sized genal spines, and an extremely small pygidium. Paleobiology Database. "Chancia", accessed March 27, 2011. Coppold, Murray
Chancia_(trilobite)
Genus of trilobites
prominent glabella with eye ridges, lack of pleural spines, a large spineless pygidium about as long as the thorax or cephalon, and its length: up to 12 cm. Reconstruction
Ogygopsis
Species of beetle
sizes. The pygidium is longer than wide, narrowing slightly posteriorly, with a rounded posterior margin. The egg-shaped scales on the pygidium are not of
Asactopholis_squamigera
Species of beetle
male, the elongated tarsi, and the presence of cretaceous marks on the pygidium". The tree resulting from the analysis is listed below: There are 2 subspecies:
Goliathus_albosignatus
Species of beetle
elongated, square at the base. Legs are long and slender, greenish and hairy. Pygidium (last male tergite) shows a deep but small V-shaped notch. This species
Psilothrix_viridicoerulea
Extinct genus of trilobites
trilobites, Megistaspis has a cephalon, eight thoracic segments, and a pygidium which may or may not bear a terminal spine. The cephalon is large and semielliptical
Megistaspis
Order of arachnids known as whip scorpions
πυγή (pygē) "rump" referring to the whip-like flagellum on the end of the pygidium, a small plate made up of the last three segments of the abdominal exoskeleton
Uropygi
Species of beetle
and with the anterior angles of the pronotum scarcely projecting. The pygidium is almost as long as wide and much more sparsely punctate. The colour is
Rufotrichia_rufescens
Extinct genus of trilobites
from O. debuchii in having mainly thirteen instead of eleven ribs in the pygidium, and with a fourteenth pair faintly indicated in some specimens. Ogygiocarella
Ogygiocarella
Extinct marine arthropod
thorax segments also ending in stubby genal spines, and a tailshield (pygidium) with a pair of massive tusk-like spines, and two smaller spines near the
Aaveqaspis
Genus of trilobite
elongated thorax is composed of 27+ segments. The 20 or so segments of the pygidium are poorly defined, as they are fused together. Budd, Graham E. (1995)
Kleptothule
Genus of beetles
circularly rounded in apical third, the sutural angle not reëntrant; pygidium closely but not densely clothed with slender and suberect pale squamules;
Zyzzyva
Species of beetle
small, dark setigerous punctures. The disc is weakly puncto-striate. The pygidium is yellowish-brown with scattered, erect white setae. BioLib Schoolmeesters
Sparrmannia_acicularis
Phylum of segmented worms
reach their full size. Prostomium Peristomium O Mouth Growth zone Pygidium O Anus In addition to Sipuncula and Echiura, also lineages like Lobatocerebrum
Annelid
Grouping of segments into functional units
genes they influence. The tagmata of a trilobite: cephalon, thorax and pygidium Tagmata of an insect: head (cephalon), thorax and abdomen Tagmata and major
Tagma_(biology)
Species of beetle
derived from Latin coopertus (meaning completely covered) and refers to the pygidium of the males, that is covered by yellowish chalky material. Global Biodiversity
Paratrichius_coopertus
Species of beetle
fairly short hairs, which are particularly numerous (and longer) on the pygidium. The hairs on the thorax are also somewhat longer. BioLib Schoolmeesters
Plectris_subcarinata
Extinct genus of Trilobite
There are very long furrows in the pygidium. The flaps in these furrows bulge outwards to the edges of the pygidium and have a pointed tip. The rearmost
Tolkienia
Species of beetle
are narrow and smooth. On the pygidium, the coarse spots are quite widely spaced and in the posterior half of the pygidium, they bear fine hairs. The center
Apogonia_monticola
Species of beetle
underneath are white. The elytra are pale and edged with black, while the pygidium has flavous scales. BioLib Schoolmeesters, P. (2025). "Omocrates lobipes
Omocrates_lobipes
Extinct species of arthropod
Zhang, Xi-Guang (ed.). "A Burgess Shale mandibulate arthropod with a pygidium: a case of convergent evolution". Papers in Palaeontology. 7 (4): 1877–1894
Tokummia
Genus of trilobites
with frequently parallel edges. Thorax : Strongly convex axis. Triangular Pygidium Convex axis, with segmentation well defined. 6 - 8 axial rings. Pleurae
Colpocoryphe
Species of beetle
the pygidium and underside are dark metallic green. There are long black and shorter pale setae on the disc of the pronotum, the elytra and pygidium. "Global
Watkinsia_bella
Species of beetle
species. The pygidium is shiny before the apex and somewhat more densely punctate there, whereas in S. planicollis, the punctation on the pygidium is uniform
Sophrops_egregius
Extinct superfamily of trilobites
shaped spines on the three rear thoracic segments. The tailshield (or pygidium) is typically small with an entire margin or pair of spines in Paradoxididae
Paradoxidoidea
Species of beetle
on the pronotum, scutellum, elytra and pygidium, as well as the scattered, whitish short hairs on the pygidium. Global Biodiversity Information Facility
Stripsipher_spectralis
Species of beetle
setae. The pygidium and underside show, in addition to extremely dense and fine punctation, widely spaced, coarser punctures. On the pygidium, the coarser
Schizonycha_excisiceps
Species of beetle
the flat ribs. The pygidium bears large umbilical punctures, which are covered with white scales in the anterior part of the pygidium and with erect grey
Apogonia_luzonica
Species of beetle
sides, and the weakly prominent ribs bear only a few punctures. The yellow pygidium is somewhat more strongly punctate towards the posterior margin than in
Eotrichia_biscuspis
Extinct genus of trilobites
and also has 5 pairs of pleural lappets or spines projecting from the pygidium. Length ranges from approximately 3 to 9 cm. Morzadec, Pierre (1997-04-29)
Hollardops
Extinct genus of trilobites
meaning "indistinct." The headshield (or cephalon) and tailshield (or pygidium) are semicircular and without a border (defined by a furrow or a change
Asaphus
Extinct genus of trilobite
or absent entirely. Unlike other members of the dalmanitid family, the pygidium (posterior section) of this genus lacks a terminal spine, instead possessing
Waukeshaaspis
Illustration of the fossilized pygidium (tail segment) of the Cambrian trilobite Dikelocephalus
List of the Paleozoic life of Wisconsin
List_of_the_Paleozoic_life_of_Wisconsin
Genus of trilobites
Lakes region. These trilobites have eleven thoracic segments, a very small pygidium and long genal and pygidial spines. Ceraurus is quite common in the Ordovician
Ceraurus
Species of beetle
thin and short, light grey setae. On the pygidium, these setae are longer and tufted in the middle of the pygidium. BioLib Schoolmeesters, P. (2025). "Adoretus
Adoretus_congoensis
Species of beetle
reddish-brown and the antennae black. The base of the pronotum, scutellum, elytra, pygidium, propygidium and abdomen are all covered with greyish-yellow to brownish-yellow
Heterochelus_bimucronatus
Order of arachnids
and forms the pedicel, while the last three are constricted, forming the pygidium. The last segment bears a short whip-like tail or flagellum, consisting
Schizomida
Extinct order of trilobites
Wolchov River Wren's Nest Morphology Exoskeleton Tagmata Cephalon Thorax Pygidium Axial lobe Pleural lobe Terminology Cranidium Effacement Enrollment Facial
Harpetida
Small Cambrian arthropod
It has a headshield (or cephalon) slightly larger than the tailshield (pygidium), and in between them six thoracic body segments (somites). The genus is
Buenaspis
Species of beetle
a dark brown, elongated ovoid body. The head, pronotum, scutellum and pygidium are green, with a strong coppery luster. The elytra are yellowish brown
Serica_liboyani
Species of beetle
black or blackish-brown. The head is punctate and the pronotum, elytra and pygidium are densely and finely punctate, while the scutellum is sparsely punctate
Melolontha_insulana
Species of beetle
Adults reach a length of about 11–12 mm. They are black and shiny, with the pygidium and the last two abdominal segments reddish-yellow. The frons is moderately
Isonychus_podicalis
Species of beetle
opaque, with the antennae (except the club) reddish, the propygidium and pygidium are glabrous, and the abdominal segments have an upper patch of similar
Dichelus_laticollis
Species of beetle
punctures are much deeper and slightly more closely set on the elytra, the pygidium, abdomen, and pectus are pubescent. BioLib Schoolmeesters, P. (2025). "Diplotropis
Diplotropis_castanea
Lichid trilobite genus
mechanism, deterring predators with an exterior similar to spiked armor. The pygidium is large and shield-like with four pairs of slightly curved barbed spines
Terataspis
pleurae with long spines, additional spines on the axial rings, and a pygidium that is considerably smaller than its cephalon. Zacanthoides idahoensis
Zacanthoides
Species of beetle
laterally expanded female elytra, smooth mostly impunctate ventrites and shiny pygidium with apical tuft of setae "Anoplognathus olivieri". Retrieved 2023-01-08
Anoplognathus_olivieri
Extinct genus of arthropods
4 in) long. It has a headshield (or cephalon) wider than the tailshield (pygidium), and in between them three (or four?) thoracic body segments (somites)
Tariccoia
Genus of trilobites
Thorax is usually 13 segments. Pygidium has four axial rings and a long terminal piece. Posterior margin of the pygidium has a long broad medial notch
Elrathia
Species of beetle
by smooth intervals. The hairs are most minute. The upper half of the pygidium is set with irregular deep punctures, while the lower half is impunctate
Schizonycha_ovatula
Species of beetle
Nigrotrichia kiotonensis, but differs slightly in the structure of the pygidium. The colouration is blackish-brown or light brown. The frons is not densely
Nigrotrichia_convexopyga
Species of beetle
dull, blackish-brown and opalescent with a somewhat glossy pronotum and pygidium and strongly glossy legs. The elytra are punctate in rows, with the intervals
Maladera_stipidosa
Genus of earwigs
anal segment of the abdomen is transverse, depressed and not sloping. The pygidium is spinous or sharp. In males, the arms of the forceps are slender, removed
Doru_(earwig)
Species of beetle
pronotum is sparsely fringed with light brown hairs, as is the tip of the pygidium. The rest of the upper surface is glabrous. The antennae are yellow. BioLib
Astaena_nitens
Species of beetle
brown or reddish-brown, with the surface deeply, irregularly punctate. The pygidium is brown or reddish-brown, with scattered setigerous punctures and long
Sparrmannia_discrepans
Species of beetle
anterior and lateral margins of the pronotum and posterior margin of pygidium have scattered long hairs. BioLib Schoolmeesters, P. (2025). "Brahmina
Brahmina_chingjinyui
Species of beetle
surfaces, including the scutellum, have fine sparse, short hairs. On the pygidium, the hairs are somewhat longer and more erect. The elytra and pronotum
Plectris_tenuevestita
Species of beetle
behind, and the pubescence on the pronotum is longer. The propygidium and pygidium are covered with thick flavescent scales of uniform colour. BioLib Schoolmeesters
Omocrates_placidus
PYGIDIUM
PYGIDIUM
PYGIDIUM
PYGIDIUM
Female
French
Pet form of French Anne, ANOUK means "favor; grace."
Girl/Female
Tamil
Surname or Lastname
English (Cornwall)
English (Cornwall) : metonymic occupational name for someone who worked in wash house, Middle English lavendrie.English (Cornwall) : from the Old French personal name Landri, from a Germanic name composed of the elements land ‘land’ + rīc ‘power’.
Girl/Female
German, Swedish
Soft; Gentle; Victory; Friendly; Gentle Battle
Boy/Male
Indian, Punjabi, Sikh
Friend of the Supreme
Boy/Male
Hindu, Indian
Blessing of God
Girl/Female
Tamil
Deepamala | தீபமாலா
Row of lamps
Boy/Male
Tamil
Protected
Boy/Male
Hindu
The supreme Man
Girl/Female
Arabic, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Muslim, Sanskrit, Sindhi, Telugu
Lady; Woman; Tender
PYGIDIUM
PYGIDIUM
PYGIDIUM
PYGIDIUM
PYGIDIUM
n.
The caudal plate of trilobites, crustacean, and certain insects. See Illust. of Limulus and Trilobite.
pl.
of Pygidium