Coletinia dextra Molero-Baltanas, Bach de Roca & Gaju-Ricart 2022, sp. nov.
Creators: name: Molero-Baltanás, Rafael
name: Gaju-Ricart, Miquel
name: Fišer, Žiga
name: Bach de Roca, Carmen
name: Mendes, Luís F.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Zygentoma
Nicoletiidae
Coletinia
Coletinia dextra

description: Coletinia dextra Molero-Baltanás, Bach de Roca & Gaju-Ricart sp. nov.
urn:lsid:zoobank.org:act: D53B37C0-194D-4C61-B0F5-E054321A713C
Figs 6–8
Diagnosis
Light yellowish insect about 7 mm long. Pedicels of male antennae with asymmetrical apophyses; the right apophysis is larger than the left one and similar in structure to those of C. tinauti, subcylindrical and with the apex modified bearing a laminar expansion. Left apophysis smaller, its length and width about ⅔ of the right one, tapers apically and lacks glandular seta. All tibiae with one lateral small spine. Male urotergite X with 5+5 pegs. Male VIIIth urosternite with a convex hind margin, protruding and rounded. Cerci without pegs, with two rows of 5–6 basal short acute spines, one pair of them in the basal division. Female unknown.
This species is quite similar to Coletinia tinauti but differs mainly in a significant character: the asymmetry of antennae. In C. tinauti the antennae have the same size and structure as the right pedicel of the new species. But the left pedicel is less developed in C. dextra Molero-Baltanás, Bach de Roca & Gaju-Ricart sp. nov. Moreover, other differences with C. tinauti are the different shape of the hind margin of the urotergite (straighter between the posterolateral lobes in the new species) and the occurrence of authentic sensory pegs with blunt apex on terminal filaments of C. tinauti (although some of the modified setae of cerci and all on the paracercus of C. tinauti are acute), which are replaced in the new species by acute short spines. Moreover, the ratio length/width of tibiae seems to be higher in the new species.
Compared with the remaining species with asymmetrical apophyses, C. dextra sp. nov. is different to all of them because it has a more developed right apophysis, while the remaining species have a very reduced right apophysis. The more striking similarities are those shared with C. serrata Mendes, Molero-Baltanás, Bach de Roca & Gaju-Ricart sp. nov., because the apophyses are very similar in shape and structure (see below) but have an inverse position compared to C. dextra: the modified and more developed apophysis is the left one and the more reduced and not modified is the right one. Moreover, the shape of the hind margin of the urosternite VIII of males is very convex and rounded in C. dextra and almost straight and less protruding in C. serrata. More differences are shown in the discussion section of C. serrata.
Etymology
The specific name ‘ dextra ’ means ‘right side’ in Latin, which is related with the unusual asymmetry of the pedicellar apophyses of this species, more developed in the right antenna.
Material studied
Holotype SPAIN • ♂; Córdoba Province, Cerro Muriano, next to roman copper mines; 38°00′05″ N, 4°45′54″ W; 13 Nov. 2011; R. Molero leg.; MNCN _ Ent 283557, mounted on slide.
Description
MEASUREMENTS. Body length: 9.5 mm. Thorax width: 1.4 mm. Antennae broken; maximum length preserved: 7.5 mm.
BODY. Pale yellowish, abdomen slightly brownish and darker, in part due to gut contents. Head with several thin setae that are more abundant on the occipital area and on the labrum: some smaller setae are visible in the middle of the frons and the clypeus. Additionally, some macrosetae are inserted in both sides of the head, in the ‘ocular areas’, 4+4 surrounding the lateral margins of frons and about 6 on the clypeus (Fig. 6A). Scape of antennae with 6 bifid macrosetae, 3 inserted ventrally in the medial part and 3 dorsally, in a more apical position, shorter than ventral ones. Right pedicel with a developed apophysis, nearly as wide as the base of the flagellum and about 3.5 times longer than its higher width (iL/W = 3.7; oL/W = 2.6); its apex reaches the fourth joint of flagellum (Fig. 6B–C). The basal portion of this apophysis is subcylindrical and the apical portion is slender, truncated, and curved, showing a structure similar to that described for C. tinauti (Molero-Baltanás et al. 1997; Molero et al. 2013), with an apical glandular seta and a subapical lamellar projection. The integument of this apical area is pilose, covered with microtrichia. Left apophysis smaller, its length and width about ⅔ the length of the left one, about 2.8 times longer than its higher width (iL/W = 2.8; oL/W =1.8), distally not truncated but rounded, slightly acute tapering towards the apex and without a visible glandular seta (Fig. 6D). Two bifid long macrosetae are inserted in the inner side of the right apophysis, together with several thin acute setae. The right pedicel has two additional long macrosetae, similar to the four ones inserted in the left pedicel. The left apophysis lacks bifid macrosetae and bears only few small thin acute setae.
MANDIBLES. Without remarkable features. Apex of the galea with two cones, lacinia with 3–4 laminar processes and 11 setae. Last article of the maxillary palp (Fig. 7A) about 4.5–5 times longer than wide, 1.4 times longer than the penultimate and about as long as or slightly longer than the antepenultimate
(ratio n/n-2 about 1–1.1). Labial palp typical of Nicoletiidae (Fig. 7B), with 2 groups of at least 4 basiconic sensilla in the basal half of the last article.
THORAX. Thoracic nota as usual for the genus (Fig. 7C), covered with setae that are about 1/12 to 1/6 times longer than the notum, their posterior and lateral margins (and the anterior margin of the pronotum) with macrochaetae and several setae of different length. The longest macrochaetae are about half as long as the corresponding notum.
LEGS. The ratio L/W of the tibiae is as follows: protibiae: 3.8–3.9 (Fig. 7D). Mesotibiae: 4.1–4.2. Metatibiae: 4.8–5 (Fig. 7E). Metatibiae about 1.5 times longer than protibiae. All tibiae show 2 dorsal spines (a medial one and a distal one, except in protibiae where both are inserted distally) and 4 ventrally (2 subdistal and 2 more proximal). Ventral spines about as long as the diameter of the tibia, those of the protibiae slightly shorter and the subdistal ones of mesotibiae slightly longer. All tibiae with one lateral spine, inserted in the proximal half of the article; those of protibiae are smaller (their length lower than half the diameter of the tibia) and those of meso- and metatibiae bigger, their length is almost ⅔ of the diameter of the respective tibiae.
ABDOMEN. Urotergites as usual as in Coletinia, covered with thin setae that are about 1/10–1/4 times longer than the tergite and with a fringe of macrochaetae and setae of different length in their posterior and lateral margin; the longest macrochaetae are in infralateral position and are about ⅔–4/5 times longer than the corresponding tergite (Fig. 8A). Xth urotergite of the male with straight posterior border between the posterolateral lobes; each lobe with 5 sensory pegs inserted ventrally in the lateral margin and one thin seta inserted subapically (Fig. 8B–C). All these pegs have a short, subcylindrical shape, truncated in the apex. Disc of the urotergite with thin setae, 8 of them inserted in the central area of the disc between the posterolateral lobes (without counting marginal and submarginal setae; see Fig. 8B).
MALE GENITALIA. Urosternite I poorly preserved. Urosternites II–VII with 1+1 submedian, 1 +1 sublateral and 1 +1 discal macrosetae (Fig. 8D). The VIIIth urosternite has a convex hind margin (between the styli), somewhat protruding and rounded, although the medial area is almost straight (Fig. 8E). Coxites IX damaged, parameres lost. Styli IX about as long as styli VIII.
TERMINAL FILAMENTS. Long, their basal divisions represented in Fig. 8F–H; maximum length preserved of a cercus: 6.5 mm. Cerci with 8 short acute slightly pigmented spines (apex not truncated as in usual pegs); 2–3 of them are inserted in ventrolateral position of the basal division (C1) and first ring of setae of setae of the second division (C2); the right cercus has an additional ventrolateral short spine in the second ring of setae. The remaining short spines are dorsolateral, 4 in the C2 and 1 basally in the C3 of the right cercus (one per ring of setae) and one in the C1 and 4 in the C2 of the left cercus. The paracercus bears dorsally 6 acute short spines in its basal divisions, two in P1 and 4 in P2, both of P1 are mediodorsal, as well as the first and the last of P2, arranged in the first and third ring of setae of this second division. The second ring of setae has two short spines inserted in mediodorsal position (Fig. 8G). The formula of the left cercus is C1 (1[0] +2[1iv +1id]) +C2(1[1iv +1id]+ 2[1id] +3[1id] +4[1id]), of the right cercus C1 (1[1iv]) +C2(1[1iv +1id] +2[1iv +1id] +3[1id] +4[1id])+ C3 (1[1id]) and of the paracercus P1 (1[1d]+ 2[1d]) +P2 (1[1d] +2[1ld+1rd]+3[1d]). The ratio length/width of these short spines is 6.3–8.5 in cerci and 5.25–8 in the paracercus.
Habitat
The only known specimen of Coletinia dextra sp. nov. was found under a flat stone in the surroundings of the village of Cerro Muriano, close to the remains of a Roman copper mine. The insect was captured in the early morning after a rainy period and the underside of the stone was very humid. Representatives of Coletiniinae are usually not found in such a superficial habitat, but probably this specimen came up from a more subterranean place during the previous night and the special circumstances favored the finding. It is very likely that searching in deeper levels of the ground, such as MSS, could be needed to get more specimens of this new taxon.
description: Published as part of Molero-Baltanás, Rafael, Gaju-Ricart, Miquel, Fišer, Žiga, Bach de Roca, Carmen & Mendes, Luís F., 2022, Three new species of European Coletinia Wygodzinsky (Zygentoma, Nicoletiidae), with additional records and an updated identification key, pp. 127-161 in European Journal of Taxonomy 798 (1) on pages 138-143, DOI: 10.5852/ejt.2022.798.1675, http://zenodo.org/record/6341178