People genitalia of Meters. fasciculata and you will actions having mating connect coupling. (A) Virgin female genitalia when you look at the front examine. (B) Men genitalia away from pre-copula male, approaching the female genitalia. (C–E) Genital capsule, metasomal sterna S-VIII and you may S-IX. (F) Men genitalia starting this new coupling of the plug: ventral look at vaginal product and metasomal sternum S-IX projecting out from the human anatomy of one’s male by the a beneficial telescopic direction. (G) Men vaginal supplement detached of male’s system, with manhood valves brought about, gonostyli up against the alternative position about the first. (H) Metasomal sterna S-VIII and S-IX, where sternum S-IX assumes their brand new condition when you look at the male’s gut. (I) Mating connect in detail, exhibiting the lateral compression from gonocoxites. (J) The latest genital chamber away from a great plugged ladies: brand new membranous region which has the latest mating plug affixed.
On the non-Melipona varieties (F
longipes, S. aff. Postica, and P. minima), we observed sturdy penis regulators with mediator curve and a lowered spatha ( Contour 1)paring the entire morphology off cock valves and spatha from Meters. fasciculata to another learnt species, we learned that both Meters. flavolineata and you will Yards. seminigra keeps thin knob regulators which have reduced curvature. not, Meters. seminigra keeps smaller regulators than M. flavolineata, and you will a more successful spatha when compared with the other Melipona ( Contour step one).
Breakdown regarding hypothesized plugging actions
The very last position regarding mating plugs into the mated lady paired the newest position of your own male’s gut during copulation on account of “J” path and location under woman’s instinct ( Profile 4C). In all physogastric queens out-of Yards. fasciculata, i seen the latest mating connect attached to the membranous vaginal purse because of the knob regulators, towards the spatha surface created to your the feminine ventral portion, placed directly under this new gonopore ( Shape 3J). We propose that new mating plug system was triggered if men vaginal capsule are irreversibly protruded off male’s system, which leads to modified ranks of the gonostyli, knob regulators, and gonocoxites.
The fresh new mating group of Meters. fasciculata, based on a video list out of mating out of a related kinds. Throughout: (A) men in flight, seeking to reputation alone across the ladies; (B) positioned men, demonstrating sets out-of foot suitable across the female’s human anatomy; (C) male enhancing the gut of the lady; (D) male leaving the female once winning mating, that’s, new mating plug accessory. In all parts, male wings was represented so you’re able to represent its course throughout the mating, according to Additional Movies S1 .
The latest mating group of M. fasciculata, based on a video clip listing out of mating off an associated types. From top to bottom: (A) male in-flight, looking to condition in itself across the ladies; (B) positioned men, exhibiting sets away from ft fitting along side female’s looks; (C) male improving the abdomen of one’s female; (D) male making the feminine immediately following winning mating, that’s, the latest mating plug attachment. Throughout bits, male wings are represented so you’re able to show its way during the mating, according to Supplementary Movies S1 .
In accordance with the analysis anywhere between sleeping state from genital medications and you may triggered county away from mating plugs, the useful morphology, and also in videos ideas towards the mating choices away from a directly relevant species ( Secondary Video clips S1 ), i recommend that creating out-of mating plug takes place in 5 hypothetical measures ( Rates 3 and 4):
Once immobilizing the feminine body, the male inserts their metasomal sternum S-VIII within the females tergum T-VI, training it ( Profile 4C).
Just like the girls vaginal chamber is launched ( Shape 3A), the male gonostyli touches the fresh new female’s genital region. Once placement the newest sternum S-VIII, a man metasomal sternum S-IX protrudes out from the male’s body with the brand new female’s vaginal chamber along with the vaginal tablet, of the a beneficial telescopic direction ( Figure 3F). The brand new insertion from male genital capsule towards girls genital chamber is not with brand new gonostyli, and this circulate backwards in techniques, left outside the women genital chamber ( Shape 3G).