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Archisepsis diversiformis (Ozerov, 1993) (Fig. 1B) Palaeosepsis diversiformis Ozerov, 1993: 65. MATERIAL EXAMINED. ��� French Guiana ��� 1 ♀; Mitaraka, different sites near base camp and along trails, tropical most forest (different sites); 10-14.III.2015; FIT; Julien Touroult & Eddy Poirier leg.; FR-GU/ Mitaraka /2015; sample code MITARAKA/192; MNHN ��� 1 ♂, 6♀; MIT-DZ; 02��14���01.8���N, 54��27���01.0���W; 306 m a.s.l.; tropical moist forest (plateau-slope ��� cleared); 6.III.2015; FIT; Julien Touroult & Eddy Poirier leg.; FR-GU/ Mitaraka /2015; sample code MITARAKA/220; MNHN. UPDATED DISTRIBUTION. ��� Argentina (Salta, Tucum��n), Brazil (Mato Grosso), Costa Rica, Ecuador, French Guiana, Jamaica, Mexico (Jalisco), Panama, Peru, Venezuela. REMARKS The record of this species from Puntarenas, Argentina, by Ozerov (2005) is considered an error. A locality with the name Punta Arenas is known from Chile (province Magallanes) and one called Puntarenas (province Puntarenas) from Costa Rica, but not from Argentina. As no Sepsidae have been recorded from Chile thus far, and as the species is already known from Costa Rica, it is believed that Ozerov���s locality refers to Puntarenas in the latter country. New to French Guiana., Published as part of Silva, Vera C. & Pollet, Marc, 2020, The Sepsidae of the Mitaraka expedition, French Guiana (Diptera), pp. 195-205 in Zoosystema 42 (14) on page 198, DOI: 10.5252/zoosystema2020v42a14, http://zenodo.org/record/3824270, {"references":["OZEROV A. L. 1993. - Six new species of the genus Palaeosepsis Duda (Diptera, Sepsidae). Russian Entomological Journal 2 (1): 63 - 71.","OZEROV A. L. 2005. - World Catalogue of the family Sepsidae (Insecta: Diptera). Zoologicheskie issledovania 8: 1 - 74."]}

Se evaluó el efecto de la cópula como factor esti­mulante de la oviposición en Archisepsis diversiformis utilizando hembras de dos edades, y en la longevidad de la hembra y en la proporción sexual de la progenie, tomando en cuenta el tamaño de hembra y macho, y el desarrollo de los ovocitos en relación a la edad de la hembra. Se demostró que una demora en copular indujo una demora en oviponer. También hubo similitud en el número de huevos puestos en los diez primeros días después de la cópula, en el número promedio de posturas (grupo de huevos puestos por día) durante toda la vida de una hembra, y en el tiempo promedio transcurrido entre posturas. Otra evidencia del efecto de la cópula en la ovipostura, fue que las hembras que copularon ovipositaron más rápido que las vírgenes. Además, éstas colocaron un número muy bajo (en prome­dio 14) de huevos a partir de los 13 días de edad, mientras que hembras de esta misma edad (que previamente habían copulado a los dos o seis días de edad) colocaron un mayor número (en promedio 75) de huevos. Como en otros estu­dios, el tamaño de la hembra tuvo un efecto significativo sobre el número total de huevos puestos. Sin embargo, el tamaño del macho afectó significativamente la tasa (Nº total de huevos/duración de la vida de la hembra) de ovipostura. Estos datos sugieren la posibilidad de que la selección sexual por elección femenina actúe en hembras de esta especie de mosca.Effects of copulation and male size on the oviposition behavior of the manure fly Archisepsis diversiformis (Diptera: Sepsidae). I evaluated the effect of copulation as a stimulation factor for oviposition of Archisepsis diversiformis by using two different age groups of females. In addition, I tested the effect of copulation on female longevity and progeny sex ratio, taking into account female and male size, and oocyte development in relation to female age. A delay in copulation leads to a delay in oviposition. Females of both age groups started to oviposit between four and five days after copulation. The number of eggs that were laid during the first ten days after copulation, the average number of ovipositions (number of eggs laid per day) during the female’s life, and the average time between ovipositions were all similar. I found further evidence for the effect of copulation on oviposition: when females copulate, they oviposited faster than virgin females. In addition, these females laid a lower number of eggs after the age of 13 days, while females of the same age (that have copulated before, when they were two or six days old) laid a higher number of eggs (an average of 75 eggs). Oocytes in virgin females became larger with age; 57 % of the variation in the number of eggs laid by females depends on female’s longevity. As in other studies, female size had an effect on the total number of eggs laid. However, male size significantly affected the oviposition rate (total number of eggs/female longevity). Females tended to have a higher oviposition rate after copulating with larger males. These data suggest that for this fly species, sexual selection through female choice might be occurring. Rev. Biol. Trop. 57 (Suppl. 1): 239-250. Epub 2009 November 30.

Female rejections of males are crucial events in sexual selection by female choice and sexually antagonistic coevolution, but there are few detailed studies of the process of rejection. Female struggles when mounted by males are often assumed to function to dislodge the male. But this study, in which female receptivity was manipulated by using females of different ages, showed that this “dislodgement” males. Mounts in Archisepsis diversiformis often failed, but males were nevertheless seldom thrown off; instead, they almost always dismounted while the female was quiet. Males also showed signs of being in control of dismounts, as they dismounted more quickly if the female had recently been mounted by another male. Predictions from two other hypotheses for the function of female resistance behaviour also either failed or were not consistently supported: (1) females resist in order to filter males with respect to their ability to hold on to the female or outlast her resistance, or to court while mounted (“ma...