Cryptocephalinae
Guides
Pachybrachis gilberti
Pachybrachis gilberti is a species of case-bearing leaf beetle in the family Chrysomelidae, described by Barney in 2019. The genus Pachybrachis contains numerous small, often colorful leaf beetles commonly known as 'scriptured leaf beetles' due to their frequently ornate elytral patterns. This species was documented during a 2021 collecting trip in southeastern Arizona, where specimens were attracted to ultraviolet and mercury-vapor light stations in mesquite-acacia scrub habitat. As a recently described species, detailed natural history information remains limited.
Pachybrachis hybridus
Red Split-necked Pachy
Pachybrachis hybridus is a species of case-bearing leaf beetle in the family Chrysomelidae. Commonly known as the Red Split-necked Pachy, this small beetle is found in Central America and North America. The genus Pachybrachis contains numerous species that are often challenging to distinguish, and many require expert identification.
Pachybrachis immaculatus
Pachybrachis immaculatus is a species of case-bearing leaf beetle in the family Chrysomelidae. The species was described by Jacoby in 1889. As a member of the genus Pachybrachis, it belongs to a group commonly known as scriptured leaf beetles, recognized for their often intricate elytral patterns. Very little specific information about this particular species has been documented in the available literature.
Pachybrachis impurus
Pachybrachis impurus is a species of case-bearing leaf beetle in the family Chrysomelidae. It is found in North America. The genus Pachybrachis is characterized by small, rounded beetles with enlarged hind femora adapted for jumping. Adults typically feed on foliage of various plants, while larvae develop within protective cases constructed from fecal material and plant debris.
Pachybrachis integratus
Pachybrachis integratus is a species of case-bearing leaf beetle in the family Chrysomelidae, described by Fall in 1915. Like other members of the genus, it belongs to the subfamily Cryptocephalinae, characterized by larvae that construct protective cases from fecal material and shed exoskeletons. The species is documented from North America, with specific records from the southwestern United States including Arizona.
Pachybrachis kentuckyensis
Pachybrachis kentuckyensis is a species of case-bearing leaf beetle in the family Chrysomelidae, subfamily Cryptocephalinae. The genus Pachybrachis is a large North American group commonly known as "scriptured leaf beetles" due to the intricate patterns on their elytra. Species in this genus are typically small, compact beetles associated with various host plants. Pachybrachis kentuckyensis is one of many species in this taxonomically challenging genus that requires careful examination for identification.
Pachybrachis m-nigrum
Pachybrachis m-nigrum is a species of case-bearing leaf beetle in the family Chrysomelidae, first described by Melsheimer in 1847. The specific epithet 'm-nigrum' refers to a distinctive black marking shaped like the letter 'M' on the elytra. Like other members of the genus Pachybrachis, it constructs protective cases from fecal material. The species is documented from eastern Canada and has been recorded in the southwestern United States.
Pachybrachis macronychus
Pachybrachis macronychus is a case-bearing leaf beetle in the family Chrysomelidae. The species was described by Fall in 1915. It is known from North America. Like other members of the genus, it likely inhabits vegetation in arid and semi-arid regions, though specific ecological details remain poorly documented.
Pachybrachis madera
Pachybrachis madera is a species of flea beetle in the family Chrysomelidae, described by Robert J. Barney in 2019. The species epithet refers to Madera Canyon in the Santa Rita Mountains of Arizona, the type locality where specimens were collected. Like other members of the genus Pachybrachis, it belongs to the subfamily Cryptocephalinae. The species is known from oak-juniper woodland habitats in southeastern Arizona.
Pachybrachis marginatus
Pachybrachis marginatus is a species of case-bearing leaf beetle in the family Chrysomelidae, first described by Bowditch in 1909. It belongs to the subfamily Cryptocephalinae, a group known for larvae that construct and carry protective cases from fecal material and shed exoskeletons. The species is native to North America.
Pachybrachis marmoratus
Pachybrachis marmoratus is a species of case-bearing leaf beetle in the family Chrysomelidae. The genus Pachybrachis comprises small, convex beetles that construct protective cases from fecal material and shed exuviae, a trait shared with other members of the subfamily Cryptocephalinae. This species occurs in both Central America and North America.
Pachybrachis mellitus
Dark-honey Creosote Pachy
Pachybrachis mellitus is a small leaf beetle in the family Chrysomelidae, first described by Bowditch in 1909. The species is known from southwestern North America and has been documented in association with creosote bush (Larrea tridentata) and other desert vegetation. The common name "Dark-honey Creosote Pachy" reflects both its coloration and apparent habitat preference. It is one of numerous Pachybrachis species found in the arid regions of the southwestern United States and northern Mexico.
Pachybrachis nigricornis
Pachybrachis nigricornis is a species of case-bearing leaf beetle in the family Chrysomelidae, originally described by Thomas Say in 1824 as Cryptocephalus nigricornis. The species is distributed across North America and Central America, with records from Canada (Alberta) through the United States. It belongs to a large genus of small, often colorful leaf beetles commonly known as 'scriptured leaf beetles' due to their intricate elytral patterns. Four subspecies are currently recognized.
Pachybrachis othonus
Legume Case-bearing Leaf Beetle
Pachybrachis othonus is a case-bearing leaf beetle in the family Chrysomelidae, commonly known as the Legume Case-bearing Leaf Beetle. The species was described by Thomas Say in 1825 and is native to North America. It belongs to a genus characterized by larvae that construct protective cases from fecal material and shed skins.
Pachybrachis pectoralis
A case-bearing leaf beetle in the family Chrysomelidae, first described by Melsheimer in 1847. It is one of numerous small, rounded leaf beetles in the genus Pachybrachis, commonly referred to as script-bearing leaf beetles due to the often intricate markings on their elytra. The species occurs in North America, with records from Canada (Ontario, Québec) and the United States. Like other members of its genus, it likely feeds on various herbaceous plants and shrubs.
Pachybrachis picturatus
Pachybrachis picturatus is a small leaf beetle in the family Chrysomelidae, subfamily Cryptocephalinae. The genus Pachybrachis contains numerous small, often colorfully patterned species commonly known as case-bearing leaf beetles due to the larval habit of constructing protective cases from fecal material. This species was described by Germar in 1824 and occurs in North America.
Pachybrachis pusillus
Bulge-eyed Yellow Pachy
Pachybrachis pusillus is a small leaf beetle in the family Chrysomelidae, subfamily Cryptocephalinae. The species is known from the southwestern United States and Mexico. Adults have been collected at light traps in mesquite-acacia scrub and oak-juniper woodland habitats in Arizona. The common name "Bulge-eyed Yellow Pachy" refers to distinctive eye morphology and coloration typical of the genus.
Pachybrachis signatifrons
Pachybrachis signatifrons is a species of case-bearing leaf beetle in the family Chrysomelidae. It is found in North America. The species was described by Mannerheim in 1843. Like other members of its genus, it belongs to the subfamily Cryptocephalinae, which are characterized by larvae that construct and carry protective cases.
Pachybrachis stygicus
Pachybrachis stygicus is a small leaf beetle in the family Chrysomelidae, first described by Fall in 1915. The genus Pachybrachis is part of the tribe Pachybrachini, commonly known as the scriptured leaf beetles for their often intricate elytral patterns. The species epithet 'stygicus' derives from Greek mythology, referring to the river Styx, suggesting dark or gloomy coloration. Records indicate presence in North America, with observations documented in the southwestern United States.
Pachybrachis subfasciatus
Pachybrachis subfasciatus is a species of case-bearing leaf beetle in the family Chrysomelidae. It is a small beetle native to North America, with records from Canada (Manitoba, Ontario) and the United States. The species is part of the diverse genus Pachybrachis, which contains numerous similar-looking species that are often difficult to distinguish without close examination.
Pachybrachis subvittatus
Pachybrachis subvittatus is a species of case-bearing leaf beetle in the family Chrysomelidae. It is a small beetle belonging to a genus of flea beetles and case-bearers distributed across North America. The species was described by John Lawrence LeConte in 1880. Like other members of its genus, it likely carries its eggs in cases constructed from fecal material, a characteristic trait of the Cryptocephalinae subfamily.
Pachybrachis tacitus
A small leaf beetle in the family Chrysomelidae, described by Fall in 1915. Like other members of the genus Pachybrachis, this species is part of a diverse group of case-bearing leaf beetles found in North America. The species is documented from limited collection records, with observations spanning the southwestern United States.
Pachybrachis texasensis
Pachybrachis texasensis is a species of case-bearing leaf beetle in the family Chrysomelidae, described by Robert J. Barney in 2021. The species is part of the diverse genus Pachybrachis, which contains numerous small, often colorful beetles associated with various host plants. As a recently described species, detailed biological information remains limited.
Pachybrachis turbidus
Robust Plains Pachy
Pachybrachis turbidus is a species of leaf beetle in the family Chrysomelidae, commonly known as the Robust Plains Pachy. It belongs to a large genus of small, often colorful leaf beetles found primarily in North America. The species has been documented through 386 iNaturalist observations, indicating it is moderately well-observed but not extensively studied in the scientific literature.
Pachybrachis turgidicollis
Pachybrachis turgidicollis is a species of case-bearing leaf beetle in the family Chrysomelidae. It has been documented in North America, specifically recorded from Arizona and Texas. The species was described by Fall in 1915. Like other members of the genus, it belongs to the tribe Pachybrachini, which are known for their compact bodies and enlarged hind femora.
Pachybrachis uteanus
A case-bearing leaf beetle in the family Chrysomelidae, described by Fall in 1915. The species is known from North America. As a member of the genus Pachybrachis, it belongs to a group commonly referred to as case-bearing leaf beetles due to the habit of larvae constructing protective cases from fecal material and shed skins.
Pachybrachis varians
Pachybrachis varians is a species of case-bearing leaf beetle in the family Chrysomelidae, described by Bowditch in 1909. The genus Pachybrachis belongs to the subfamily Cryptocephalinae, a group known for larvae that construct protective cases from fecal material and exuviae. Like other members of this genus, P. varians is likely small in size and associated with specific host plants, though detailed biological information for this particular species remains limited. The species occurs in North America.
Pachybrachis vulnerosus
A species of case-bearing leaf beetle in the family Chrysomelidae, described by Fall in 1915. It belongs to the tribe Pachybrachini, a group known for their hardened, case-like elytra that protect the abdomen. The species is found in North America, with specific records from the southwestern United States including Arizona.
Pachybrachis wenzeli
case-bearing leaf beetle
Pachybrachis wenzeli is a species of case-bearing leaf beetle in the family Chrysomelidae. It is found primarily in North America. The species belongs to a genus known for larvae that construct protective cases from their own fecal material. Specific biological details for this species remain poorly documented in published literature.
Promecosoma inflatum
Promecosoma inflatum is a species of leaf beetle in the family Chrysomelidae, subfamily Cryptocephalinae, tribe Clytrini. It was described by Lefèvre in 1877. The species has a limited known distribution spanning the southwestern United States (Arizona) and Mexico. As a member of the Clytrini, it belongs to a group of leaf beetles often associated with specific host plants, though detailed biological information remains sparse in the published literature.
Pseudochlamys
Pseudochlamys is a genus of warty leaf beetles in the family Chrysomelidae, subfamily Cryptocephalinae. The genus contains at least one described species, P. semirufescens, and is known from Colombia. Detailed natural history information exists for P. megalostomoides, revealing a complex life cycle involving fecal shelter construction, four larval instars, and host-specific feeding on Waltheria plants.
Saxinis sonorensis
Saxinis sonorensis is a species of case-bearing leaf beetle in the family Chrysomelidae. It was described by Jacoby in 1889. The species occurs in Central America and North America, with two recognized subspecies: S. s. scutellaris (Schaeffer, 1906) and S. s. sonorensis (Jacoby, 1889). As a member of the case-bearing leaf beetles, larvae construct protective cases from fecal material and plant debris.
Triachus
case-bearing leaf beetles
Triachus is a small genus of case-bearing leaf beetles in the family Chrysomelidae, established by J.L. LeConte in 1880. The genus contains five described species distributed in North America. Members of this genus are classified within the tribe Clytrini, which is characterized by larvae that construct portable cases from their own fecal material mixed with plant debris. Adults are leaf-feeding beetles.
Triachus cerinus
Triachus cerinus is a case-bearing leaf beetle in the family Chrysomelidae, first described by John Lawrence LeConte in 1880. The species is known to occur in North America and the Caribbean region. As a member of the tribe Clytrini, it likely constructs protective cases from fecal material and plant debris, a characteristic behavior of this group. Information on its biology and ecology remains limited in published literature.