Mexico
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Valenzuela perplexus
lizard barklouse
Valenzuela perplexus is a species of lizard barklouse in the family Caeciliusidae, a group of small, winged insects commonly associated with bark and foliage habitats. The species was described by Chapman in 1930 and is distributed across Central America and North America, with records from Mexico. Like other members of the genus Valenzuela, it is likely associated with dead leaf and bark microhabitats. The specific epithet "perplexus" suggests taxonomic complexity in its original description.
Valenzuela totonacus
Valenzuela totonacus is a species of barklouse in the family Caeciliusidae, described by Mockford in 1966. The species belongs to the order Psocodea, a group of small, often overlooked insects commonly known as barklice or booklice. It has been recorded from the southern United States through Mexico to Guatemala.
Vostox excavatus
Vostox excavatus is a species of earwig in the family Spongiphoridae, described from western Mexico in 1961. It belongs to a genus of small, delicate earwigs often found in arid and semi-arid environments. The species name 'excavatus' refers to a concave or hollowed feature, likely describing a diagnostic morphological character. Records indicate it occurs in Baja California Sur and Sinaloa.
Wormaldia arizonensis
Wormaldia arizonensis is a species of caddisfly in the family Philopotamidae, originally described by Ling in 1938. It belongs to the second largest genus in its family, with approximately 175 extant species worldwide. The species is known from the southwestern United States and Mexico. As with other philopotamid caddisflies, it is presumed to have aquatic larval stages and terrestrial adult stages, though specific details of its biology remain poorly documented.
Xanthocaecilius
lizard barklice
Xanthocaecilius is a genus of lizard barklice established by Mockford in 1989. The genus contains at least two described species: Xanthocaecilius quillayute (Chapman, 1930) and Xanthocaecilius sommermanae (Mockford, 1955). These insects belong to the order Psocodea, a group that includes barklice, booklice, and parasitic lice. The genus has been recorded from Mexico and is part of the family Paracaeciliidae (sometimes referenced as Caeciliusidae in older literature).
Xanthocampsomeris hesterae
Xanthocampsomeris hesterae is a scoliid wasp described by Rohwer in 1927. It is distributed from southern Mexico through Central America to northern South America, with records from Ecuador, Colombia, Costa Rica, Panama, Trinidad and Tobago, and Venezuela. The species belongs to a genus characterized by yellow coloration, distinguishing it from related scoliid genera. Like other scoliids, it is likely a parasitoid of scarab beetle larvae, though specific host records for this species are not documented.
Xenorhipis hidalgoensis
Xenorhipis hidalgoensis is a small metallic wood-boring beetle in the family Buprestidae, notable for extreme sexual dimorphism in antennal structure. Males possess highly modified flabellate (comb-like) antennae with expanded distal segments covered in olfactory sensillae, while females retain typical serrate antennae. The species was first described from Hidalgo County, Texas, and is among the least frequently encountered buprestids in North America.
Xeropsamobeus desertus
Xeropsamobeus desertus is a species of aphodiine dung beetle in the family Scarabaeidae. It is found in desert regions of southwestern North America and northwestern Mexico. The species was described by Van Dyke in 1918.
Xestocephalus tessellatus
Xestocephalus tessellatus is a species of leafhopper in the family Cicadellidae, described by Van Duzee in 1894. It belongs to the subfamily Aphrodinae and tribe Xestocephalini. The species has been documented in the southeastern United States and Mexico based on distribution records.
Xubida dentilineatella
Xubida dentilineatella is a small crambid moth described by Barnes and McDunnough in 1913. It occurs in Mexico and the southern United States, with confirmed records from Arizona. Adults are active during summer months, and larvae are specialized borers in Saccharum species.
Xyleborus volvulus
Xyleborus volvulus is a bark beetle in the family Curculionidae. It is native to tropical and subtropical regions and has been documented in North America, the Caribbean, Middle America, and Africa. The species is an ambrosia beetle that cultivates symbiotic fungi in tunnels bored into wood. It has been observed to carry Raffaelea lauricola, the pathogen causing laurel wilt disease, which has altered its status from a wood degrader to a potential pest of avocado and other lauraceous trees.
Xyloryctes thestalus
Western Rhinoceros Beetle
Xyloryctes thestalus is a species of rhinoceros beetle in the family Scarabaeidae, commonly known as the Western Rhinoceros Beetle. Males possess prominent horns on the head and pronotum, a characteristic feature of the Dynastinae subfamily. The species is nocturnal and strongly attracted to lights, often appearing in large numbers at ultraviolet and mercury vapor light setups. It occurs across the southwestern United States and Mexico, with two recognized subspecies: X. t. thestalus and X. t. borealis.
Xylotrechus albonotatus
Xylotrechus albonotatus is a species of longhorn beetle in the family Cerambycidae, described by Thomas Lincoln Casey Jr. in 1912. It belongs to the genus Xylotrechus, a diverse group of wood-boring beetles commonly known as tiger beetles or wasp beetles due to their frequent yellow and black coloration. The specific epithet "albonotatus" refers to white markings, suggesting distinctive pale patterning on the elytra or pronotum. Like other members of the tribe Clytini, adults are likely diurnal and active on host tree trunks.
Xyphon fulgidum
Xyphon fulgidum is a leafhopper species in the family Cicadellidae, first described from California in 1932. It belongs to the genus Xyphon, a group of relatively large, often brightly colored leafhoppers within the tribe Cicadellini. The species name "fulgidum" suggests a shiny or gleaming appearance. Records indicate presence in arid and semi-arid regions of western North America and Mexico.
Xysticus paiutus
Xysticus paiutus is a species of crab spider in the family Thomisidae, first described by Gertsch in 1933. Like other members of its genus, it is a ground-dwelling ambush predator. The species occurs in the southwestern United States and Mexico. Information on its biology and ecology remains limited.
Zadiprion rohweri
Pinyon Pine Sawfly
Zadiprion rohweri, commonly known as the Pinyon Pine Sawfly, is a species of conifer-feeding sawfly in the family Diprionidae. It is associated with pinyon pine (Pinus edulis and related species) in the southwestern United States and Mexico. The species was described by Middleton in 1931 and is one of several Zadiprion species specialized on pine hosts. Sawflies in this genus are known for gregarious larval feeding that can cause noticeable defoliation.
Zelotes pseustes
Zelotes pseustes is a species of ground spider in the family Gnaphosidae, first described by Chamberlin in 1922. It belongs to a large genus of active hunters that do not build webs to capture prey. The species is distributed across the United States and Mexico. Like other Zelotes species, it is a nocturnal predator that pursues prey on the ground or on low vegetation.
Zenodoxus mexicanus
Zenodoxus mexicanus is a clearwing moth (family Sesiidae) described by Beutenmüller in 1897. The genus Zenodoxus belongs to the subfamily Tinthiinae, a group of sesiid moths characterized by their wasp-mimicking appearance and diurnal activity patterns. This species occurs in the Nearctic and Neotropical regions, with the specific epithet suggesting a Mexican distribution. Clearwing moths in this family are typically associated with woody plants, with larvae often boring into stems or roots.
Zethus guerreroi
Zethus guerreroi is a species of potter wasp in the subfamily Eumeninae, described by Zavattari in 1913. As a member of the genus Zethus, it belongs to a diverse group of solitary wasps characterized by their distinctive nest-building behavior using mud. The species is known from limited observations, with records primarily from Mexico.
Zikanapis elegans
Zikanapis elegans is a species of plasterer bee in the family Colletidae, originally described as Caupolicana elegans by Timberlake in 1965. It belongs to a genus of solitary bees found in the southwestern United States and Mexico. Like other colletid bees, it likely nests in the ground and lines its brood cells with a cellophane-like secretion. The species is poorly known, with limited observational records.
Zyginama queretarensis
Zyginama cf. queretarensis is a leafhopper in the family Cicadellidae, provisionally identified as the species Z. queretarensis. Leafhoppers in this genus are small, active insects associated with vegetation. The 'cf.' designation indicates uncertainty in species-level identification, suggesting morphological similarity to Z. queretarensis without definitive confirmation.
Zyginama tricolor
Zyginama tricolor is a species of leafhopper in the family Cicadellidae, subfamily Typhlocybinae, tribe Erythroneurini. First described by Beamer in 1929, this species belongs to a genus of small, often colorful leafhoppers. The species epithet 'tricolor' suggests a three-colored coloration pattern. Like other typhlocybine leafhoppers, it likely feeds on plant vascular tissue.
Zygogramma signatipennis
Zygogramma signatipennis is a leaf beetle in the family Chrysomelidae found in Mexico. The species has been documented feeding on acahual plants (Tithonia tubaeformis, Asteraceae), causing moderate to severe defoliation damage specifically to this host. Research suggests it shows greater feeding preference for plants in the vegetative stage and has been proposed as a potential biological control agent for management of T. tubaeformis as a weed. The species was originally described by Stål in 1859.