Trait evolution of the male genitalia in the speciose genus Caenis, with emphasis on forcipes structure (Insecta: Ephemeroptera: Caenidae)

Four new species of Elatosara (Ephemeroptera: Caenidae) from Myanmar and the Philippines

“…Caenis picea is a species with type 3a forcipes (see Malzacher 2022), apically with a number of small trichomes extending beyond the apex. The species is closely related to the West Palearctic Caenis lactea Burmeister, 1839 and is known so far from India and Thailand; here firstly reported from Myanmar.…”

“…Caenis ulmeriana is a species with type 4T forcipes (see Malzacher 2022), apically with a tuft of strong spines but without elongated penis lobes and without the dilated base of the antennal flagellum. So far known from Thailand and Sumatra and here firstly reported from Myanmar.…”

A new species of Caenis (Ephemeroptera: Caenidae) from Uganda

“…The forcipes of C. longilobata sp. n. are equipped with an apical tuft of spines (see Malzacher 2022a; forceps type 4). Within this forceps type, C. longilobata sp.…”

“…Within this forceps type, C. longilobata sp. n. belongs to the TP lineage ( Malzacher 2022a), with long and more or less triangular penis lobes but without a dilated antennal base. Caenis longilobata sp.…”

New findings of the Caenis ulmeriana-group (Ephemeroptera: Caenidae) in the Western Ghats, India

“…The genus Caenis Stephens, 1835 is the largest mayfly genus in terms of species number which accounts for about 165 species based on published records and globally widespread genus, except in the New Zealand, Antarctica and various oceanic islands (Malzacher, 2022;Srinivasan et al, 2023b). However, Indian Caenidae has ineffectively been investigated compared to other parts of the Oriental region with only two genera.…”