Species Forficesila curvicauda Motschulsky, 1863 (original) name is listed at DSF as
Labia curvicauda (currently on DSF, I think this name is not widely accepted in modern publications, but ocassionally I saw it used in non-nomenclatural sources):
https://dermaptera.speciesfile.org/otus/889317/overview

Many synonyms has been listed for this species,and many species were synonymized with this, just key ones here:
= Labia curvicauda (by de Bormans & Krauss 1900 followed by Moon & Kim, 1991)
= Circolabia curvicauda (by Srivastava 1995 and then Srivastava 2013, followed by modern Indian specialists, eg, here https://sfg.taxonworks.org/sources/220918)
= Paralabella curvicauda (by Steinmann 1989a, used previously for long time in DSF, widely accepted in non-nomenclatural sources)
= Paralabellula curvicauda (in interpretation by Kevan 1997 based on Steinmann, accepted by most of modern Dermaptera specialists, including Petr Kocarek, Yoshitaka Kamimura, Masaru Nishikawa)
= Metalabella curvicauda Sakai & Takahashi, 1998 (not accepted currently, only used by Sakai, synonymized by Nishikawa)

Kevan not questioned validity of the genus but explained that Paralabella Steinmann hould be treated as junior synonym of Euborellia Burr because of the fact that the type species of genus designated by Steinmann Paralabella annulata (Fabricius) is synonym of Euborellia annulata as was explained by Brindle 1981, publication was overlooked by Steinmann), type species is mentioned on DSF for Paralabella genus:
https://dermaptera.speciesfile.org/otus/889300/overview

I believe latest nomenclatural reference for Paralabellula curvicauda with all synonyms listed reference will be article by Kim&Nishikawa 2017:

Literature:
Bormans & Krauss 1900. Das Tierreich, Berlin, 11: 70
Srivastava, G.K. (2013) Fauna of India and the adjacent countries--Dermaptera: Apachyoidea and Forficuloidae, Part III. Zoological Survey of India, Kolkata, 1–469 pp.
Steinmann, H. (1989a) Dermaptera. Eudermaptera I. Das Tierreich, Supplement No. 106, 1–558.
Kevan, D. & Vickery, V. (1997) An annotated provisional list of non-saltatorial orthopteroid insects of Micronesia, compiled mainly from the literature. MICRONESICA, 30(2) December), 269–353.
Moon, T.Y. & Kim, C.W. (1991) Catalogue of Korean Dermaptera. Entomological Research Bulletin (KEI), 17, 67–79.
Kim, T. & Nishikawa, M. (2017) Notes on the Earwig Family Spongiphoridae (Insecta: Dermaptera), with a New Record of Spongovostox sakaii in Korea. 33(2), 112–122.

I have updated Paralabellula by now in DSF with refereeing to Kevan and Kim&Nishikawa