Hypogastrura herrerosvelai, Arbea & Fernández, 2020

Arbea, Javier I. & Fernandez, Toni Perez, 2020, A new species and a new record of Hypogastrura (Collembola, Hypogastruridae) from Miguel Angel Blanco shaft (Jaen, Spain), Subterranean Biology 35, pp. 65-78 : 67-69

Hypogastrura herrerosvelai sp. nov. Figs 3 , 4

Type locality.

Spain, Jaén: Sierra de las Villas karst of Villacarrillo, Sima Miguel Ángel Blanco, 38°03'43.02"N, 2°54'19.85"W, 1377 m elevation.

Type material.

Holotype female mounted on slide: Spain, Jaén, Villacarrillo, Sierra de las Villas karst, Sima Miguel Ángel Blanco, 13 April 2019, G.E.V. leg. Paratypes: 1 male and 11 females mounted on slides, same data as for holotype. Holotype and paratypes deposited in MNCN.

Etymology.

Dedicated to our colleague Alfonso Carlos Herreros Vela, founding partner of the Villacarrillo Speleology Group (G.E.V.).

Distribution.

This species is known only from the type locality.

Description.

Body length (excluding antennae) of adults: holotype 1.0 mm, male 1.1 mm, females 0.9-1.3 mm. Habitus typical of genus. Color dark bluish-black, paler ventrally, eye-patches dark. Granulation fine and uniform, 7-10 granules between chaetae p1 on Abd. V (Fig. 4F ).

Ant. IV with simple apical vesicle, subapical organite (or), microsensillum (ms), two lateral and three dorsal long thin and curved blunt sensilla (S7, S8 + S1, S2, S3 in Fig. 4A ). Ant. III-organ with two long (outer) and two short (inner) sensilla (Fig. 4A ). Microsensillum on Ant. III present. Ant. I with eight chaetae (chaeta p’ present).

Ocelli 8 + 8. Postantennal organ 1.5-1.8 larger than neighboring ocellus, with four subequal lobes of which anterior pair larger than posterior one. Accessory boss present (Fig. 4B ). Labrum with four distinct apical papillae (Fig. 4E ). Labral chaetae 5, 5, 4, prelabrals 4. Maxillary head of the H. tullbergi type ( Fjellberg 1984) and labium as in Fjellberg (1999) (Fig. 4C ). Outer lobe of maxilla with two sublobal hairs (Fig. 4D ).

Tibiotarsi I, II, III with 19, 19, 18 chaetae respectively. Apical chaeta A1 long pointed or blunt. Claws with small inner tooth. Empodial appendage with broad basal lamella and apical filament reaching slightly beyond inner tooth of unguis (Fig. 4J ).

Chaetotaxy of head typical of genus, with complete set of v-chaetae (Fig. 3A ). Chaetae short and smooth. Body sensilla (s) about two times longer than ordinary chaetae, fine and smooth. Dorsal chaetotaxy as in Fig. 3A, B . Th. I with 3 + 3 chaetae. Th. II with chaetae m2, m3, m4 and m5 present, m6' and m6 absent. Th. III with chaetae m3, m4 and m5 present, m2 and m6' absent and chaeta m6 usually absent (rarely present). Abd. IV with chaetae p3 and p7 present, and with chaetae m1 to m6 present. On Abd. V chaetae p2 present (2+2 chaetae between s-chaetae) and m-chaetae absent. Subcoxae1 of legs I, II, III with 1, 3, 3 chaetae respectively. Microsensillum on Th. II present.

Ventral chaetotaxy as in Fig. 3C, D . Ventral tube with four chaetae on each side. Retinaculum with 4 + 4 teeth.

Furca well developed (ratio dens+mucro/inner edge of claw III 2.5-3.5). Dens without tooth-like granules and ventro-apical swelling. Dorsal side of dens with fine granulation (the granules become enlarged towards apex) and seven chaetae. Mucro with relatively high outer lamella. Ratio dens/mucro 3.5-4.5 (Fig. 4I ).

Anal spines small, situated on high basal papillae (Fig. 4G, H ), ratio anal spine/basal papilla 0.5-0.7, ratio anal spine+basal papilla/inner edge of claw III 0.9-1.0.

Figures

Figure 3. Hypogastrura herrerosvelai sp. nov A, B dorsal chaetotaxy C, D ventral chaetotaxy. Scale: 0.2 mm.

Figure 4. Hypogastrura herrerosvelai sp. nov. A ant. III-IV chaetotaxy B PAO and eyes C labium (A-E labial papillae) D maxillary palp E labrum F axial chaetotaxy and granulation on Abd. V G, H anal spines in lateral (G) and dorsal (H) view I Dens and mucro J Tibiotarsus and claw III. Scales: 0.03 mm (10, 12, 14 - 19), 0.02 mm (11, 13).