Hypogastrura cartisoara, Paśnik & Sternalski, 2021

Paśnik, Grzegorz & Sternalski, Jakub, 2021, A remarkable new species of Hypogastrura (Collembola, Hypogastruridae) from the Romanian Carpathians, Zootaxa 5067 (3), pp. 439-446 : 440-441

Hypogastrura cartisoara sp. nov.

http://zoobank.org/ 88589E50-E705-4871-9DBA-F8EE76CB34D8

Figs 1–12

Type material. Holotype female: Romania, Făgăraș Mountains , Transfăgărășan, Cartisoara, 45°36’05”N, 24°36’27”E, 2150 m, 28.ix.2019, leg. G. Paśnik & J. Sternalski. Paratypes: 2 males, 5 females, 6 juveniles and 10 specimens in alcohol: same data as holotype. All material deposited at the Institute of Systematics and Evolution of Animals , Polish Academy of Sciences, Kraków, Poland ( ISEA) .

Diagnosis. Habitus typical of the genus. Ocelli 7+7. Postantennal organ with four subequal lobes. Ant. IV with simple apical bulb, subapical organite (or), microsensillum (ms) and 4 thin, cylindrical, curved sensilla. Labrum with four distinct apical papillae. Head with two “a” setae (a0 and a0’). Abdominal tergite IV without setae p3, abdominal tergite V without setae p2. Tibiotarsi with one knobbed tenent hair. Ventral tube with five setae on each side; retinaculum with 3+3 teeth. Dens dorsally with relatively coarse, uniform granulation and seven setae.

Description. Body length range: 0.7–1.2 mm. Females: 0.8 mm to 1.2 mm; males: 0.7 mm to 0.9 mm; juveniles: up to 0.85 mm. Holotype length 1.2 mm.

Habitus typical of the genus. Colour in alcohol brownish-red with small parts of segments and intersegmental areas depigmented. Eye patches dark. Granulation fine and uniform, 12–15 granules between setae p1 on Abd. V. Body setae smooth, generally subequal in length. Tergal sensilla (s) long, about 2–3 times longer than ordinary setae, smooth and apically rounded.

Head. Antennae distinctly shorter than head. Ant. IV with simple apical bulb, subapical organite (or), microsensillum (ms) and 4 thin, cylindrical, curved sensilla (3 dorsoexternal and 1 dorsointernal) ( Fig. 11 ). Ant. III with 19 setae and microsensillum (ms) on outer side. AIIIO with 2 short rods in separate foveae and 2 guard sensilla ( Fig. 11 ). Ant. II with 13 setae. Ant. I with 7 setae (p seta absent).

Ocelli 7+7 ( Figs 2 , 5 ). Postantennal organ (PAO) with four subequal lobes; slightly smaller than or equal to neighbouring ocellus ( Fig. 5 ). Accessory boss absent. Dorsal head chaetotaxy with 5 p (p1–5), 5 c (c1–5), 2 v (v1– 2), 5 d (d1–5), 5 sd (sd1–5), 3 oc (oc1–3), 5 g (g1–5) and 2 a (a0, a0’) setae ( Fig. 2 ). Labral setae 5, 5, 4, prelabrals 4 ( Fig. 6 ). Labrum with four distinct apical papillae ( Fig. 7 ). Maxillary head and labium of the H. tullbergi type ( Fjellberg 1984, 1999). Outer lobe of maxilla with two sublobal hairs.

Thoracic chaetotaxy ( Fig. 3 ). Th. I with 3 setae (p1, p3–4), Th. II with 3 rows of setae; 6 setae in a-row (a1–a6), 1 extra seta (am) posteriorly (in some specimens symmetrical, in others asymmetrical), 5 setae in m-row (m3 absent, m6 sensilliform), 6 setae in p-row (p4 sensilliform). Th. III with 6 setae in a-row, 4 setae in m-row (m2–m3 absent, m6 sensilliform), 6 setae in p-row (p4 sensilliform). Microsensillum on Th II present. Th. sterna I–III without setae.

Abdominal chaetotaxy ( Fig. 4 ). Abd. I with 3 rows of setae; 6 setae in a-row (a1–a6), 2 setae in m-row (m3–m4) and 6 setae in p-row (p5 sensilliform). Abd. II–III with 6 setae in a- and p-rows (p5 sensilliform), single m4 setae in m-row; Abd. IV with 6 setae in a-row (a1–a6), 2 setae in m-row (m1, m5 present; m2–4 absent), 6 setae in p-row (p3 absent, p5 sensilliform).Abd. V with 4 setae in rows ‘a’ and ‘p’, p2 absent, p3 sensilliform. Abd. VI with 2 rows of setae, a-row with 3 setae (a1–3), and p-row with 3 setae (p0, p2–3). Anal spines small, straight, situated on high basal papillae ( Fig. 4 , 10 ). Ratio anal spines/basal papilla 0.6–0.7. Ventral tube with five setae on each side ( Fig. 9 ). Retinaculum with 3 + 3 teeth.

Furca well developed ( Fig. 8 ). Dorsal side of dens with relatively coarse, uniform granulation and seven setae. Mucro with straight and very narrow outer lamella. Ratio dens/mucro 2.8–3.3 ( Fig. 8 ). Manubrium with 10–13 setae on each side.

Legs ( Fig. 12 ). Tibiotarsi I, II, III with 19,19,18 setae respectively. Upper subcoxae I, II, III with 1,2,2 setae respectively. Apical tenent setae (A1) of each tibiotarsus relatively short and distinctly knobbed. Claws with inner tooth ( Fig. 12 ). Empodial appendage with broad basal lamella and apical filament reaching 3/4 of claw length.

Etymology. Refers to the type locality of the new species, Cârțișoara village in Transfăgărășan, Romania. Habitat. Soil on mountain slope covered with grass, moss and dicotyledonous plants from the genera Glechoma and Alchemilla ( Fig. 1 ).

Figures

FIGURE 1. Environment (A) and sampling site (B) in the Romanian Carpathians (photo by G. Paśnik).

FIGURES 2–4. Hypogastrura cartisoara sp. nov.: 2, chaetotaxy of head; 3, chaetotaxy of thoracic tergites I–III; 4, chaetotaxy of abdominal tergites (all photos in DIC contrast).

FIGURES 5–10. Hypogastrura cartisoara sp. nov.: 5, postantennal organ and neighbour ocelli; 6, labrum; 7, apical part of labrum with indicated apical papillae; 8, furca; 9, ventral tube; 10; anal spines (all photos in DIC contrast).

FIGURES 11–12. Hypogastrura cartisoara sp. nov.: 11, antennal segments III–IV; 12, tibiotarsus and claw of hind legs.