Plusiocampa, Silvestri, 1912

Sendra, Alberto & Weber, Dieter, 2018, An unexpected discovery of a new subgenus and a species of Plusiocampa (Campodeidae, Diplura) alongside an overview of Central European subterranean campodeids, European Journal of Taxonomy 428, pp. 1-21 : 4-5

Key of the subgenera of Plusiocampa

1. No dorsal femoral macrosetae; without medial posterior notal macrosetae; extra macrosetae on the first to the eighth urosternites (with the exception of Plusiocampa (Stygiocampa) bureschi Silvestri, 1931 and Plusiocampa (Stygiocampa) denisi Condé, 1947 ) ................. Stygiocampa Silvestri, 1934

– One, two or five dorsal femoral macrosetae; with or without medial posterior notal macrosetae. No extra macrosetae on the first to the eighth urosternites (with the exception of Plusiocampa (Plusiocampa) dargilani (Moniez, 1894)) ........................................................................................ 2

2. One or two dorsal femoral macrosetae; with or without medial posterior notal macrosetae; without glandular setae g 1 in females ............................................................................................................. 3

– Five dorsal femoral macrosetae; two to four ventral tibial macrosetae; with medial posterior notal macrosetae; with glandular setae g 1 in females .............................. Pentachaetocampa subgen. nov.

3. One dorsal femoral macroseta; zero to four ventral tibial macrosetae ............................................. 4

– Two dorsal femoral macrosetae; two to four ventral tibial macrosetae .... Dydimocampa Paclt, 1957

4. One to four ventral tibial macrosetae; with or without medial posterior notal macrosetae; subequal to unequal claws but upmost the posterior claw is 2 times as longer as the anterior claw ................. ...................................................................................................... Plusiocampa s. str. Silvestri, 1912

– No ventral tibial macrosetae; without medial posterior notal macrosetae; very unequal claws (posterior claw 2.5 times as long as anterior claw) ................. Venetocampa Bareth & Condé, 1984

For Plusiocampa s. str., its 47 species and 10 subspecies bear one dorsal femoral macroseta and 1–3 ventral tibial macrosetae. They are distributed from the Pontic Mountains in the northwest of the Anatolian Peninsula to the Betic Mountains on the Iberian Peninsula, colonizing the Balkan, Iberian and Italian peninsulas the Central French Massif included, and also the Aegean and most of the west-Mediterranean islands, reaching the Alps and the Carpathians Mountain ranges towards the north and in the south an isolated location in the Kabylie Mountains, northern Algeria. Most of its species inhabit subterranean ecosystems ( Condé 1956) and only eight species and two subspecies can be considered soil-dwelling.

Stygiocampa has six species, all of them sharing the absence of dorsal femoral macrosetae in addition to a progressive reduction of the notal and urotergal macrosetae formula. Furthermore, four of these species have an increase in the number of macrosetae on the urosternites. All of this shows remarkable troglomorphic features, its species inhabiting the subterranean ecosystems around the Dinaric Alps ( Condé & Bareth 1996).

The two species of Dydimocampa share the possession of two dorsal femoral macrosetae and in both the mp meso- and metanotal macrosetae are absent. They have been found at two unique locations, a

cave in the Crimean Peninsula ( Silvestri 1949) and in the Movile Cave ( Condé 1996) in the southeast of Romania, both near the Black Sea.

Only one species is proposed in Venetocampa: Plusiocampa (Venetocampa) paolettii Bareth & Condé, 1984 , collected from a single cave in the Feltrine Alps. It is characterized by the absence of ventral tibial macrosetae and the progressive reduction of the notal and urotergal macrosetae, sharing these features with Stygiocampa, and the presence of dorsal femoral macrosetae as its differential feature ( Bareth & Condé 1984). With this definition, another troglobitic species, Plusiocampa (Plusiocampa) dargilani (Moniez, 1984) could be included in Venetocampa. Plusiocampa dargilani was found in many caves in the Central Massif, southern France ( Condé 1997), and in addition, it shares with most of the species of Stygiocampa an increase in macrosetae on the urosternites.

Finally, the new subgenus Pentachaetocampa subgen. nov. bears two synapomorphic features that separate it from other already-known Plusiocampinae : the five dorsal macrosetae on the meso- and metathoracic femur and the presence of a narrow field of g 1 -glandular setae on the first urosternite in adult females. No other species of Plusiocampa has five dorsal femoral macrosetae, although this does occur in another genus of Plusiocampinae . This is the case for Hystrichocampa Condé, 1948 , a monospecific genus with a widely distributed species, H. pelletieri Condé, 1948 , from several caves and mines from karst regions around the French and Swiss Jura ( Condé 1948, 1962). Nevertheless, many solid features differentiate Hystrichocampa from Pentachaetocampa subgen. nov. Among them the most noticeable are: the shape and pubescence of the telotarsal processes, the absence of g 1 - glandular setae in females and the unequal claws in Hystrichocampa . Furthermore, no other Plusiocampa or Plusicampinae females bear g 1 -glandular setae on the first urosternite.