Plusiocampa ( Plusiocampa ) beroni Bareth & Condé, 2001

Sendra, Alberto, Stoev, Pavel & Selfa, Jesús, 2025, Cave-adapted Plusiocampinae (Diplura, Campodeidae) from the eastern part of the Balkan Peninsula, Deutsche Entomologische Zeitschrift 72 (2), pp. 317-340 : 317-340

publication ID	https://doi.org/10.3897/dez.72.162647
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scientific name	Plusiocampa ( Plusiocampa ) beroni Bareth & Condé, 2001
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Plusiocampa ( Plusiocampa) beroni Bareth & Condé, 2001

Figs 2 View Figure 2 , 3 View Figure 3 , 4 View Figure 4 , 21 View Figure 21

Plusiocampa ( Plusiocampa) beroni Bareth & Condé, 2001: 16, figs 3 b, 4 a – e. Type locality: Cave Magura, village Rabisha, Vidin District, Bulgaria.

Plusiocampa View in CoL ( Stygiocampa [sic!]) aff. beroni : Beron et al., 2011 610.

Plusiocampa View in CoL ( Stygiocampa [sic!]) beroni : Beron, 2015: 92.

Plusiocampa View in CoL ( Stygiocampa [sic!]) cf. beroni : Beron, 2015: 92.

New material examined.

Bulgaria: Western Rhodopes Mts . • 13 ex., Gotse Deltsev District, Village Ribnovo, Cave Manuilovata , 1182 m alt., 30 Apr. 1994, leg. B. Petrov • 2 ex., Gotse Deltchev District, Village Gospodintsi, Cave Salievata , 02 Nov. 1994, leg. B. Petrov • 4 ex., Pazardzhik District, Peshtera town, Kupena Reserve, Cave Novata Peshtera , 540 m alt., 17 Oct. 1992, leg. B. Petrov • 3 ex., same locality and collector, 07 Nov. 2004; 6 ex., same locality, 27 Jun. 1986, leg. P. Beron • 4 ex., Kupena Reserve, Cave Vodnata Peshtera , 27 Jun. 1986, 890 m alt., leg. P. Beron • 4 ex., same locality, 02 Jul. 2006, leg. P. Stoev, B. Petrov • 1 ex., Kupena Reserve, Village Ravnogor, Cave Pavla , 1322 m alt., 01 Jul. 2006, leg. B. Petrov and P. Stoev; Vlahina Mountain • 3 ex., Blagoevgrad Distr., Village Logodazh, Cave Boichova Dupka , 14 Sep. 1994, leg. B. Petrov; Predbalkan • 2 males, 3 females, Lovetch District, Village Dragana, Sinyoto Ezero Cave , 25 Aug. 1985, leg. B. Garev.

Diagnosis.

( Bareth and Condé 2001): Epicuticle smooth at high magnifications (Fig. 4 b View Figure 4 ). Antennae with 26–29 antennomeres; distal whorl of 24–26 gouge sensilla that are 30 µm long (Fig. 2 a – c View Figure 2 ); 6–8 complex olfactory chemoreceptors on cupuliform organ, each with a prominent central protrusion surrounding a single fold (Fig. 2 d View Figure 2 ); border of cupuliform organ with a whorl of presumably glandular setae long and short, long ones with a shallow distal part with an apical opening (Fig. 2 d, e View Figure 2 ); non-protruding frontal process with non-tubercular setae. Pronotum with 1 + 1 ma, 3 + 3 la, 2 + 2 lp macrosetae; mesonotum with 1 + 1 ma, 3 + 3 la, 2 + 2 lp, 1 + 1 mp macrosetae (Fig. 3 a, b View Figure 3 ; metanotum with 1 + 1 ma, 1 + 1 (2 + 1) la, 2 + 2 lp, 1 + 1 mp macrosetae; long, barbed notal macrosetae; abundant notal clothing setae. Two ventral tibial macrosetae; unequal claws (ratio 1.10-1.30) with large lateral crests, posterior claw with a backward overhang (Fig. 3 c – f View Figure 3 ). Urotergites I – II with 1 + 1 post macrosetae; urotergites III with 2 + 2 post macrosetae (1 + 1 la, 1 + 1 post on one specimen from Novata Peştera, western Rhodope); urotergite IV with 1 + 1 la, 4 + 4–5 + 5 post macrosetae; urotergite V with 1 + 1–2 + 2 la, 5 + 5 post macrosetae; urotergites VI – VII with 2 + 2–3 + 3 la, 5 + 5 post macrosetae; urotergite VIII with 6 + 6 post macrosetae; abdominal segment IX with 8 + 8 post macrosetae; urosternite I with 7 + 7, urosternites II – VII with 5 + 5, urosternite VIII with 2 + 2 macrosetae (Fig. 4 View Figure 4 ); stylus setae with a few barbs (Fig. 4 b View Figure 4 ). Male with an area of glandular g 1 setae, subcylindrical appendages with glandular a 1 setae (adults from Gruffre Padez, Sofia with short, thick appendages with a large area of glandular a 1 setae); female with subcylindrical appendages with glandular a 1 setae. Spermatozoid fascicle wheels with 2 turns of 50 µm long and 5 µm diameter filament.

Habitat and distribution.

This species was originally described from Magura Cave near the village of Rabisha in northwestern Bulgaria ( Bareth and Condé 2001). In the same publication, the authors also reported it from another cave in the region – Varkan near the village of Druzhba. Two other records – though uncertain – have been reported from Padezh Cave near the village of Breze and Novata Cave near the town of Peshtera.

Here, we confirm the species’ presence in caves in the Peshtera area and report its occurrence in other caves in the Rhodopes along the Mesta Valley, as well as in one cave in the Vlahina Mountain and one in the Predbalkan region. Thus, the species appears to be distributed across parts of western Bulgaria, although its range remains highly fragmented, with confirmed presence in only 10 caves to date (Fig. 21 View Figure 21 ).

Despite being found exclusively in subterranean habitats, the species does not exhibit strong adaptations to the cave environment.