Females collected on Grande Comore in November were pregnant, but data on reproduction is limited and suggests individual and inter-island variation.

[2] This classification remained for the next few decades; in 1992, for example, Javier Juste and Carlos Ibáñez recognized five subspecies, including griveaudi, within M. minor, ranging from São Tomé to Madagascar.

[4] In 2007, Juste and colleagues re-examined the relationships of the M. minor group using DNA sequences from the mitochondrial cytochrome b (cyt b) gene.

[7] In another molecular study, published in 2008 and using both cyt b and mitochondrial D-loop sequences, Nicole Weyeneth and colleagues found that examined specimens of "Miniopterus manavi" actually grouped in two, distantly related clades—one including specimens from Madagascar, Anjouan, and Grande Comore, and the other occurring on Madagascar and Anjouan only.

[8] The next year, Steven Goodman and colleagues further explored the relationships of the bats known as "Miniopterus manavi" using cyt b sequences and morphological comparisons.

[13] In the Comoros, individual colonies or groups sometimes consist exclusively of one color variant, but there is no apparent genetic differentiation between the two forms.

[17] There are some differences in measurements among the island populations; animals from Grande Comore are generally smallest, those from Anjouan are intermediate, and those from Madagascar are largest.

[20] The karyotype is conserved among species of Miniopterus; the number of chromosomes and arms is identical in M. griveaudi, the Malagasy M. aelleni and M. gleni, and even the Asian M. fuliginosus.

[13] The central groove in the nasal depression (the lowered area at the nose) is relatively broad in comparison to M. manavi.

[25] Miniopterus griveaudi was assessed as "Data Deficient" on the IUCN Red List in 2008,[1] but the account predates the recognition of the species on Anjouan and Madagascar.

In two caves surveyed on Grande Comore in November 2006, all females were pregnant with single embryos with crown-rump lengths of 14 to 19 mm (0.55 to 0.75 in), but none of the males were reproductively active.

[26] Although specimens of M. griveaudi differ by only 0.6% in their cyt b sequences, analysis of D-loop data does show some differentiation between the island populations.