Cytology
Guides
Benacus
Benacus is a genus of giant water bugs in the family Belostomatidae, subfamily Lethocerinae. The genus was established by Stål in 1861 and contains species of large aquatic predatory insects. Spermatogenesis has been studied cytologically in Benacus griseus, revealing 28 spermatogonial chromosomes and distinct cytoplasmic inclusions including chondriosomes and Golgi bodies during sperm development.
Lasiopogon bivittatus
Lasiopogon bivittatus is a species of robber fly (Diptera: Asilidae) in the bivittatus section of the genus Lasiopogon. The species was described by Loew in 1866 and has been the subject of cytological studies examining spermatogenesis. Recent taxonomic revision of the bivittatus section included redescription of this species and molecular phylogenetic analysis placing it within a clade of western Nearctic Lasiopogon species.
Nephrotoma suturalis
tiger crane fly
Nephrotoma suturalis is a species of tiger crane fly in the family Tipulidae, first described by Loew in 1863. The species has been extensively used as a model organism in cell biology research, particularly for studies of spermatogenesis and spindle microtubule dynamics. Two subspecies are recognized: N. s. suturalis in the southeastern USA and N. s. wulpiana with a broader distribution including western North America and adventive populations in Europe and Hawaii.
Paratylotropidia
Beutenmueller's grasshopper (P. beutenmuelleri)
Paratylotropidia is a genus of spur-throated grasshoppers in the family Acrididae, subfamily Melanoplinae, tribe Dactylotini. The genus contains at least three described species: P. beutenmuelleri, P. brunneri, and P. morsei. Members of this genus possess the characteristic spur-throat structure typical of their tribe. P. brunneri has been the subject of cytological study due to its unusual multiple chromosome system, with 19 chromosomes in diploid male cells including four V-shaped multiples.