Remycampa herbanica Sendra & Oromi, Sendra & Oromi, 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

publication ID	https://dx.doi.org/10.3897/subtbiol.34.50231
publication LSID	lsid:zoobank.org:pub:B2058907-20E7-465A-8F34-1FA674D9BB6F
persistent identifier	https://treatment.plazi.org/id/5619DB84-4E4A-4293-85E7-3C6A65B9F392
taxon LSID	lsid:zoobank.org:act:5619DB84-4E4A-4293-85E7-3C6A65B9F392
treatment provided by	Subterranean Biology by Pensoft
scientific name	Remycampa herbanica Sendra & Oromi
status	sp. nov.

Treatment

Remycampa herbanica Sendra & Oromi sp. nov. Figs 5-12 View Figures 5–12 , 13-16 View Figures 13–16 , 17-20 View Figures 17–20 , 21-26 View Figures 21–26 , 27-30 View Figures 27–30 ; Tables 1, 2

Type locality.

Spain, Canary Islands, Fuerteventura: El Castillo, Montaña Blanca Cave (28°24'3.48"N, 13°52'51.08"W, 166 m a.s.l.).

Type material.

Holotype: 1 ♀, Spain, Canary Islands, Fuerteventura: El Castillo, Montaña Blanca Cave (28°24'3.48"N, 13°52'51.08"W, 166 m a.s.l.), 5 October 2018, A. Sendra & P. Oromí leg. (DZUL). Paratypes: 5 ♂♂, 1 juvenile (labelled M1 to M5-paratype and J-paratype), same locality as holotype, 12 July 2015, P. Oromí, H. López & B. Rodríguez leg. All type material mounted in Marc André II solution. Depositories: DZUL (2 ♂♂), IPNA-CSIC (1 ♂), ASM (2 ♂♂, 1 juvenile).

Other studied material.

Same data as holotype, two specimens mounted on two separate aluminium stages and coated with palladium-gold.

Description.

Body length 3.8-4.4 mm in males (n = 5), 4.2 mm in females (n = 1) and 2.2 mm in one juvenile (Table 1 View Table 1 ). Epicuticle smooth under optical microscope but slightly reticulated at high magnifications as irregular polygonal structures of variable size (Fig. 14 View Figures 13–16 ). Body with scarce short clothing setae with one or two apical barbs on each seta (Fig. 18 View Figures 17–20 ).

Antennae with 36 antennomeres in one complete intact antenna in the holotype; antennae 0.84 × as long as the body length with medial antennomeres 2 × longer than wide, as is the apical antennomere. Cupuliform organ with about 21 complex olfactory chemoreceptors arranged in two concentric circles with one in the centre, each apparently with a pile of fused plates forming a coniform structure (Figs 5-9 View Figures 5–12 ). Distal and central antennomeres with two or three whorls of barbed macrosetae and scattered smooth setae, in addition to a single distal whorl of 8-12 short thick gouge sensilla 10 µm long (Fig. 10 View Figures 5–12 ). These latter are more abundant on the dorsal side of the antennomere, including one or two very short coniform sensilla. Proximal antennomeres with typical trichobothria, plus a small coniform sensillum on third antennomere in ventral position.

Moderate protrusion of frontal process covered with very slightly tuberculated setae with two to five barbs on distal half (Fig. 11 View Figures 5–12 ). Three macrosetae along each side of the line of insertion of antennomere and setae x with thin distal barbs; length ratios a/i/p/x as the 29/26/17/24 in female paratype (Fig. 11 View Figures 5–12 ).

Large mandibulae with at least five teeth, the two posterior ones with a row of small denticles. Atypical labium with slight torsion to the right of the labial palps, slight elongation of the palpiform processes, and a deep groove in the middle of labium from posterior border of anterior lobe to the middle of submentum, without reaching the posterior border of labium (Fig. 12 View Figures 5–12 ). Suboval labial palps each with small latero-external sensillum, three guard setae and up to 68 neuroglandular setae (Fig. 12 View Figures 5–12 ).

Thoracic macroseta distribution (Figs 13 View Figures 13–16 - 20 View Figures 17–20 ): pronotum and mesonotum with 1+1 ma, 1+1 la, 1+1 lp macrosetae; metanotum with 1+1 ma macrosetae. All macrosetae short and slightly thick with short barbs along basal two-thirds of each seta; marginal setae longer and more barbed than clothing setae (Figs 13 View Figures 13–16 - 20 View Figures 17–20 ). Legs elongated, metathoracic legs reaching abdominal segment IX, about 0.5 × as long as the body length (Figs 21-26 View Figures 21–26 ; Table 1 View Table 1 ). Tibia always longer than femur or tarsus (Table 1 View Table 1 ). Femorae I-III each with one short thick dorsal macroseta with a few barbs. Calcars with long barbs throughout one side (Fig. 25 View Figures 21–26 ). Tibiae I-III with two short ventral macrosetae with two to four distal barbs; some paratypes with three sternal tibial macrosetae on the metathoracic leg (Figs 23 View Figures 21–26 , 26 View Figures 21–26 ). Two rows of ventral barbed setae with two lines each of two to five barbs (Figs 21 View Figures 21–26 , 25 View Figures 21–26 ). Three smooth dorsal distal tarsal setae longer than the rest (Fig. 21 View Figures 21–26 ). Subequal claws with a lateral expansion curved towards the two ventral sides. Smooth laminar telotarsal processes curved along and ending in a slightly wide expansion with a narrow prolongation on one side, a unique shape among diplurans (Figs 21 View Figures 21–26 , 22 View Figures 21–26 , 25 View Figures 21–26 ).

Distribution of abdominal macrosetae on tergites (Fig. 27 View Figures 27–30 ): 1+1 ma on I-III; 1+1 ma, 1+1 la on IV, 1+1 ma, 1+1 la, 1+1 lp3 on V-VII; 1+1 mp, 3+3 lp1-3 on VIII; and 1+1 mp, 5+5 lp1-5 on IX abdominal segment. All tergal abdominal macrosetae short, slightly thick with thin short barbs being ma and mp the shortest.

Urosternite I with 6+6 macrosetae (Figs 28 View Figures 27–30 , 29 View Figures 27–30 ); urosternites II to VII with 4+4 macrosetae; urosternite VIII with 1+1 macrosetae; urosternal macrosetae of medium length or longer, with a few long barbs in one single row along the distal half to four-fifths. Stylus with an apical, a subapical and a ventromedial seta with a few long barbs arranged in one row along the distal four-fifths (Fig. 30 View Figures 27–30 ). Cerci more than 2 × as long as the body length, 2.1 × as long as the body in the only apparently intact cercus of the holotype; with 27 primary articles, not counting the multi-divided basal article (Table 2 View Table 2 ). Length of cerci increases very slightly from the proximal to distal articles; they are covered with a whorl of alternate smooth thin macrosetae and smooth thin setae, and a whorl of shorter smooth thin setae at the end of each primary article. These whorls, except the apical one, increase from one to four from the proximal to distal primary articles.

Female urosternite I with slim cylindrical appendages, each bearing up to seven glandular a1 setae in a distal field (Fig. 29 View Figures 27–30 ).

Male urosternite I with short coniform appendages, each bearing about 13 glandular a1 setae in a distal field; posterior edge occupied by a large but narrow field of cramped up to 190 glandular g1 setae (Fig. 28 View Figures 27–30 ).

Etymology.

Referring to Herbania, the ancient name of Fuerteventura, the only island on which it has been found.

Molecular data.

The barcode sequence of one specimen of R. herbanica (code 112BC) has been registered in GenBank with the ascension number MN729498.

Phylogenetic analyses.

Available COI barcode sequences of Diplura stored in BOLD were retrieved (search for Diplura on 14th November 2019 at http://www.boldsystems.org/index.php/) to identify the species closest to R. herbanica . After excluding redundant sequences for several taxa, a total of 46 sequences, representing approximately 28 species from at least 10 genera were retained. They were then aligned with the newly generated R. herbanica sequence using the MAFFT E-INS-I algorithm ( Katoh et al. 2002). A preliminary maximum likelihood tree was generated using the Fast Tree 2.1.5 ( Price et al. 2009) tool in Geneious 7.1.9 ( Kearse et al. 2012) to identify taxa closely related to R. herbanica .

The genetic results do not show well supported relationships of R. herbanica with the other diplurans with barcode sequences in BOLD. Based on this preliminary result we only can confirm genetically that this new species belongs to the family Campodeidae .