Spaniocampa relicta Sendra & Lopez, 2020

Sendra, Alberto, Lopez, Heriberto, Selfa, Jesus & Oromi, Pedro, 2020, Two new dipluran species unearthed from subterranean habitats of the Canary Islands (Arthropoda, Hexapoda, Entognatha), Subterranean Biology 34, pp. 39-59 : 39

Spaniocampa relicta Sendra & Lopez sp. nov. Figs 31-34

Type locality.

Spain, Canary Islands, Gran Canaria: Brezal del Palmital (28°6'33.58"N, 15°36'1.73"W, 551 m a.s.l.).

Type material.

Holotype: 1 ♀, Spain, Canary Islands, Gran Canaria: Brezal del Palmital (MSS3) (28°6'33.58"N, 15°36'1.73"W, 551 m a.s.l.), 4 July 2010, H. López leg (DZUL). Paratypes: same data as holotype, 1 ♀, 1♂ (ASM). All type material mounted in Marc André II solution.

Description.

Body length 3.4 mm (paratype) and 4.1 mm (holotype) in females, and 3.5 mm (paratype) in male. Epicuticle with small microdenticles under optical microscope on dorsal side of nota and legs. Body with smooth clothing setae.

Broken antennae on the three types; medial antennomeres (antennomere XII intact) as long as wide, a single distal whorl of 8-10 short and thin gouge sensilla 12 µm long. Proximal antennomeres with typical trichobothria plus a bacilliform sensillum on third antennomere in ventral position.

Plain frontal process with one anterior and three posterior smooth setae; length ratios of a/p as 53/23 in holotype. The three macrosetae along each side of the line of insertion of antennomere with thin distal barbs and length ratios of a/i/p as 17/27/16 in holotype; no x setae observed; Each suboval labial palp has a small latero-external subcylindrical sensillum; two guard setae, up to three simple setae on anterior border and up to 70 neuroglandular setae in holotype.

Non-thoracic macrosetae on pronotum, mesonotum and metanotum; short slightly thick marginal setae with very thin or smooth apical barbs (Fig. 31 ). Metathoracic legs reaching abdominal segment VII. Femora without dorsal macrosetae. Tibiae I-III without typical ventral barbs but with a short ventral apical one with a few thin distal barbs; calcars with three to six thin barbs along one side. Two dorsal tarsal smooth setae similar to clothing setae, but much longer. Subequal claws, slightly wider at the base and regularly curved. Smooth setiform telotarsal processes overpassing the end of the claws.

Distribution of abdominal macrosetae on tergites (Fig. 34 ): 1+1 lp3 on urotergite VIII; 3+3 lp3,4,5 on abdominal segment IX, and 4+4 macrosetae on abdominal segment X; all these macrosetae long and well-differentiated with thin barbs along the distal third to three-quarters.

Urosternite I with 5+5 macrosetae; urosternites II to VII with 3+3 macrosetae; urosternite VIII with 1+1 macrosetae; urosternal macrosetae short to middle size with one to five apical to distal barbs (Figs 32 , 33 ).

Stylus with an apical, a subapical and a ventromedial setae with a few distal thin long barbs, more abundant on the ventromedial seta (Fig. 33 ). Cerci absent in the studied specimens.

Female urosternite I with short subcylindrical appendages, each bearing up to 14 glandular a1 setae in a distal field. The posterior border of the urosternite bears three or four groups of small setiform setae with between two and ten units (Fig. 32 ).

Male urosternite I with short thick appendages, each bearing about 35 glandular a1 setae in two apparently distal fields; posterior edge slightly enlarged at both sides of the first urosternite with a glandular field of about 140 glandular g1 setae arranged in up to six rows.

Etymology.

The specific epithet relicta refers to two situations affecting this new species: i) it has been discovered in a relict patch of laurel forest on Gran Canaria; ii) it is a relict species of a genus also distributed on the Republic of Guinea with one known extant species.

Figures

Figures 31 - 34. Spaniocampa relicta sp. nov. 31 Pro-, meso- and metanotum of holotype 32 female first ursoternite, right side, paratype 33 fourth urosternite, right side, female paratype 34 eighth to tenth abdominal segments, ventral view, right side, holotype.