Mating trials
Mating trials demonstrated that each morphotype within the N. ingens complex could successfully copulate with its own morphotype and with other morphotypes (Table 3 ). While we observed a reduction in successful mating in experiments involving N. ingens , this also occurred when N. ingens males were paired with N. ingens females, suggesting that it may have been linked to reproductive status (e.g . reproductive diapause). Successful copulation occurred across all combinations of morphotypes, although not always for both male and female directed crosses. We note, however, that sample sizes are small.