Chou (1998) lists in his species list for Taiwan Gonolabis cavaleriei (Borelli, 1921), Gonolabis formosae (Borelli, 1927) and Gonolabis marginalis (Dohrn, 1864).
Taipnet (Catalogue of Life in Taiwan) lists the same species, possibly the data are exclusively from Chou (1998)

However, on iNaturalist and facebook several different Anisolabella-species have been observed.
Nishikawa identified a few of them as Anisolabella ryukyuensis (Nishikawa, 1969), previously known for the Ryukyu-Islands.
Petr Kočárek told me in an e-mail from the 25th November 2024, regarding Euborellia arcanum Matzke & Kočárek, 2015: "The alien occurrence of E. arcanum in Mauritius is interesting! By the way, E. arcanum is molecularly identical to A. ryukyuensis... We compared molecularly specimens collected by Masaru Nishikawa in Ryukyu many years ago, but have not synonymized it yet. But this is in the plan..."
This would match expectations from Boris Eliseev and me, since on iNaturalist in East Asia many morphologically similar earwigs are observed regularly (yellow legs, very blackish, two white antennal segments, habitus etc.) and E. arcanum is distributed widely throughout the southeastern USA, probably introduced there a long time ago from East Asia and then spreaded to european greenhouses. The alien occurence on Mauritius was next to a hotel, with lot of asian tourists. Anisolabella is also known for North Africa and the Arabian Peninsula.
On the other hand, Danilo Matzke told me in e-mails, that E. arcanum and A. ryukyuensis are morphologically two separate species and only the US and european specimens would match, not the east asian ones. 1st December 2024: "Aber das dauert noch ein wenig da sie sich morphologisch doch etwas unterscheiden somit nicht ganz identisch sind." and on 17th February 2025: "Das kann alles möglich sein muss man sich überraschen lassen. [...] Ja in dieser Facebookgruppe bin ich auch vertreten. ;-)) Ist ganz interessant und mit den neuesten Funden und Bildern. [...] Genau, und P. Kocarek hat die Tiere aus Florida mit den Gewächshaustieren genetisch verglichen und Bingo [...] Und die haben sich dann über Florida über den Süden der USA verbreitet und kamen dann auch nach EU. ;-)). [...] Ist schon ganz schön interessant nun muss man abwarten wie es sich weiter entwickelt."


However, those are the morphotypes:
1) dark with yellow legs and light forceps base = "G. formosae/A.ryukyuensis"-type
https://www.inaturalist.org/observations/261708150
https://www.facebook.com/photo/?fbid=555...980870805303808
https://www.facebook.com/photo/?fbid=689...469609406429953 (identified by Masaru Nishikawa as probably Anisolabella ryukyuensis)
https://www.facebook.com/photo?fbid=4658747057564598

2) bicolored legs = "sp. nov. 1"
https://www.inaturalist.org/observations/249759280

3) completely dark = "sp. nov. 2"
https://www.inaturalist.org/observations/244665443
https://www.inaturalist.org/observations/223268901


For a comparison of some species with informations from Steinmann (1989):
G. cavaleriei: 13-15,5mm, 16 antennal joints, 2 joints yellowish
A. ryukyuensis: 17-22mm, 17 antennal joints, 1-4 joints whitish
E. arcanum: 20-26mm, 21 antennal joints, usually 2-3 joints whitish
G. formosae: 26-27,5mm, 22 antennal joints, ?
A. marginalis: 17,5-30mm, 15 antennal joints, 1-4 joints whitish

To make things even more complicated, in Texas, there are very few specimens on iNat with a pronotum resembling rather Euborellia antoni (Dohrn, 1864) than Euborellia arcanum: https://www.inaturalist.org/observations/260214019
So a dispersal from the neotropics to the USA would also be possible, in this case it would be interesting to compare DNA barcodes of Euborellia antoni and Euborellia peregrina (Mjöberg, 1904) with those of Anisolabella-species of East Asia and typical Euborellia species (annulipes, annulata, femoralis, plebeja, moesta, andreinii etc.)

But in this case, those morphotypes should be collected and analyzed for potential new species, endemic to Taiwan.

similar specimens from mainland China:
https://www.inaturalist.org/observations/265672473
https://www.inaturalist.org/observations/212238332