Plusiocampa (Plusiocampa) chiosensis Sendra & Gasparo, 2020

Sendra, Alberto, Antić, Dragan, Barranco, Pablo, Borko, Špela, Christian, Erhard, Delić, Teo, Fadrique, Floren, Faille, Arnaud, Galli, Loris, Gasparo, Fulvio, Georgiev, Dilian, Giachino, Pier Mauro, Kovac, L'ubomír, Lukić, Marko, Marcia, Paolo, Miculinić, Kazimir, Nicolosi, Giuseppe, Palero, Ferran, Paragamian, Kaloust, Pérez, Toni, Polak, Slavko, Prieto, Carlos E., Turbanov, Ilya, Vailati, Dante & Reboleira, Ana Sofia P. S., 2020, Flourishing in subterranean ecosystems: Euro-Mediterranean Plusiocampinae and tachycampoids (Diplura, Campodeidae), European Journal of Taxonomy 591, pp. 1-138 : 39-41

publication ID	https://doi.org/ 10.5852/ejt.2020.591
publication LSID	lsid:zoobank.org:pub:5CB610DA-F9C9-4213-80E8-8A8901895A18
DOI	https://doi.org/10.5281/zenodo.3663957
persistent identifier	https://treatment.plazi.org/id/B3F3B66C-8C7C-48BF-A841-EAD3DF711C47
taxon LSID	lsid:zoobank.org:act:B3F3B66C-8C7C-48BF-A841-EAD3DF711C47
treatment provided by	Plazi
scientific name	Plusiocampa (Plusiocampa) chiosensis Sendra & Gasparo
status	sp. nov.

Treatment

Plusiocampa (Plusiocampa) chiosensis Sendra & Gasparo sp. nov.

urn:lsid:zoobank.org:act:B3F3B66C-8C7C-48BF-A841-EAD3DF711C47

Figs 44–46 View Figs 44–46 ; Tables 3–4 View Table 3 View Table 4

Etymology

The name ʻchiosensisʼ is proposed based on the island of Chios, where it occurs in its deep subterranean habitat.

Material examined

Holotype

GREECE • ♀; Chios Island , Sykias; 10 Jun. 2006; Fulvio Gasparo leg.; MZB 2019-1030 View Materials .

Paratypes

GREECE • 2 ♂♂; same collection data as for holotype; Coll . AS.

Description

BODY. Body length 4.4 and 4.9 mm (males, paratypes) and 7.8 mm (female, holotype). Epicuticle smooth under optical microscope; body with sparse thin, long clothing, covered or not by a few thin distal barbs.

HEAD. Holotype with two intact antennae of 54 antennomeres, 14.8 mm long. Small coniform sensillum of third antennomere located in ventral position between c and d macrosetae. Central antennomeres 3.8× as long as wide, apical anntenomere 3.6× as long as wide. Small cupuliform organ occupying 1/9 of total length of apical antennomere, with 6–7 complex olfactory chemoreceptors. Thin and long gouge sensilla (44–47 µm long) in a single distal whorl of 10–13 sensilla on each medial and distal antennomere. Frontal process developed, with tubercular setae and macrosetae with thin barbs. Three macrosetae along line of insertion of antennae poorly differentiated, only anterior one with 1–2 thin apical barbs; x setae longer than these macrosetae, with a couple of thin apical barbs ( Fig. 44 View Figs 44–46 ). Suboval labial palps with latero-external sensillum larger than sensillum of third antennomere, with two guard setae, up to 12 setae on anterior border and up to 130 neuroglandular setae.

THORAX. Distribution of thoracic macrosetae: pronotum with 1+1 ma, 4+4–3+3 la 1,2,3,4, 2+2 lp 2,3 (additionally in the three type specimens, 1+1 extra ma near the sagittal plane); mesonotum with 1+1 ma, 1+1 (0+1) la 2, 2+2 lp 2, 3, 1+1 mp; metanotum with 1+1 ma, 1+1 lp 2 and 1+1, 0+1 or 0+0 mp. All notal macrosetae long, thin, covered by very thin barbs along distal third up to half; marginal setae longer than clothing setae, covered by thin barbs along distal half up to two thirds; spare clothing setae, with 14, 21 and 23 clothing setae on each heminotum of pronotum, mesonotum and metanotum, respectively (holotype). Legs elongated, metathoracic legs overpassing end of abdomen in middle of tibia; measurements as in Table 3 View Table 3 . Femora II–III with one long dorsal macroseta and one longer ventral macroseta. Tibiae I–III with two ventral macrosetae surrounded all along by thin, short barbs. Calcars surrounded from base to tip by thin, short barbs. Dorsal and lateral subapical tarsal setae completely covered by thin barbs almost from base and almost to tip. Subequal claws (posterior claw 1.0–1.05× as long as anterior claw); posterior claw with a small backward overhang; lateral crests well developed, noticeably ridged on ventral side. Pretarsal lateral process setiform, with plenty of very short proximal barbs.

ABDOMEN. Distribution of abdominal macrosetae on tergites: 1+1 post 1 on I–III; 1+1 la, 2+2 lp 1,2 on IV; 1+1 la, 5+5 post 1–5 on V–VII, 8+8 post on VIII; 11+11 (11+12) post on abdominal segment IX. All post urotergal macrosetae thick, long, covered by thin barbs along distal four-fifths; la urotergal macrosetae shorter than post macrosetae, covered by barbs along distal half. Urosternite I with 7+7, urosternites II– VII with 5+5, urosternite VIII with 2+2 macrosetae; all urosternal macrosetae robust and large, covered by long barbs along distal half up to four-fifths. Apical subapical and ventro-medial setae completely surrounded by short abundant barbs.

CERCI. One complete cercus in holotype with eight articles in addition to basal article, 19.70 mm long ( Table 4 View Table 4 ), 2.53 mm longer than body length; articles show whorls of long macrosetae covered by thin barbs along distal two-thirds, combined with whorls of smooth, thin setae shorter than macrosetae.

SECONDARY SEX CHARACTERS. Female urosternite I ( Fig. 45 View Figs 44–46 ) with enlarged subcylindrical appendages, each bearing up to 16 glandular a 1 setae in a distal area. Male urosternite I ( Fig. 46 View Figs 44–46 ) without glandular g 1 setae, with moderated large subcylindrical appendages thicker than those of female, each bearing up to 33 glandular a 1 setae.

Phyletic affinities, habitat and distribution

Although P. (P.) chiosensis sp. nov. has medial posterior macrosetae on the mesonotum and metanotum (sometimes absent in one or two heminota), as do many previously described species of Plusiocampa s. str., a similar reduction in the number of lateral anterior and lateral posterior macrosetae on the mesonotum and metanotum is present in another troglomorphic species, P. (P.) glagra from continental Greece ( Condé 1984a). Plusiocampa (P.) chiosensis sp. nov. also shares a couple of noticeable taxonomical features with P. (P.) glabra in their subequal claws and the number of urosternal macrosetae. Nevertheless, the presence of 1+1 lateral anterior macrosetae on the mesonotum, the more abundant macrosetae on all urotergites, including the eighth abdominal segment, and the absence of glandular g 1 setae in males in P. (P.) chiosensis sp. nov. distinguish it from P. (P.) glabra .

Plusiocampa (P.) chiosensis sp. nov. is only known from one cave and occupies the deep subterranean spaces, showing highly troglomorphic features (elongation of appendages, antennomeres and articles, and the strengthening of sensorial equipment of the antennae).