Smithsonian miscellaneous collections . he abdomen. A point that should be empha-sized in the study of the male genitalia of insects, particularly inOrthoptera, is the fact that the structure of the phallic organ and ofthe genital segment is not necessarily, in its principal aspect, an adapta-tion to the functions of copulation and intromission, but may be verylargely concerned with the formation of spermatophores and the trans-ference of the latter to the female. NO. 14 INSECT ABDOMEN SNODGRASS 61 The male bursa genitalis, or genital chamber, which usually con-tains the phallic organ or organ
Smithsonian miscellaneous collections . he abdomen. A point that should be empha-sized in the study of the male genitalia of insects, particularly inOrthoptera, is the fact that the structure of the phallic organ and ofthe genital segment is not necessarily, in its principal aspect, an adapta-tion to the functions of copulation and intromission, but may be verylargely concerned with the formation of spermatophores and the trans-ference of the latter to the female. NO. 14 INSECT ABDOMEN SNODGRASS 61 The male bursa genitalis, or genital chamber, which usually con-tains the phallic organ or organs, projects into the ninth abdominalsegment (fig. 22 A, GC) since it is an invagination of the integumentbehind the ninth sternum, though its dorsal wall presumably belongsto the venter of the tenth segment. Appendages of the ninth segment(gonopods) may be entirely absent; in Orthoptera and some relatedinsects they are small styluslike structures resembling the abdominalstyli of Thysanura, though unlike the latter they are not provided. i. Dej
Size: 2074px × 1204px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, bookidsmiths, booksubjectscience
