Folsomides subvinosus, Arbea, Javier I. & Kahrarian, Morteza, 2015

Arbea, Javier I. & Kahrarian, Morteza, 2015, The genus Folsomides Stach (Collembola, Isotomidae) in Kermanshah Province (W Iran) with the description of two new species, Zootaxa 3925 (2), pp. 281-290 : 285-290

Folsomides subvinosus sp. nov.

Figs 3–4 , 7 , 10 & 12 , Tables 1, 3 & 4

Type locality. Western Iran: Sia Khor Village, Eslam Abad-e-Gharb County, Kermanshah Province, 34º07' N, 46º38' E, 1442 m a.s.l.

Type material. Holotype female and 7 females paratypes, Iran, Kermanshah Province, Sia Khor Village, grassland soil, 14.V.2013, Morteza Kahrarian leg. Holotype and 5 paratypes deposited in IAUK, 2 paratypes in JIAP.

Other material. Iran, Kermanshah Province, Kermanshah County, Char zabar (Kor Kor Mountain), 34º13’ N, 46º40’ E, 1592 m a.s.l., oak jungle soil and leaf litter, 15.II.2013, Morteza Kahrarian leg., 12 females and 7 young specimens. Paveh County, Shabankareh Village, 34º52’ N, 46º30’ E, 1632 m a.s.l., oak jungle soil and leaf litter, 06.II.2013, Morteza Kahrarian leg., 1 female. Same, but 10.V.2013, 1 young specimen. Sar-e-pol-e-Zahab County, Patagh Area, 34º25’ N, 46º01’ E, 1404 m a.s.l., oak jungle soil and leaf litter, 14.V.2013, Morteza Kahrarian leg., 5 females and 11 young specimens. Kangavar County, Hassam Abad Village, 34º31’ N, 47º55’ E, 1480 m a.s.l., Forest Plane (Button wood), 14.XII.2012, Morteza Kahrarian leg., 1 female and 1 young specimen.

Description. Size: 0.55–0.80 mm females (holotype 0.75 mm). Colour: pale with diffuse pigment more concentrated in eye fields. Body long and slender ( Figs 3–4 ). Dorsal chaetae smooth and pointed. SA macrochaeta on Abd IV 0.20–0.25, on Abd V 0.50–0.55 times the tergite length ( Fig 7 ).

Antennae shorter than cephalic diagonal (10:12). Ant IV with some 8–10 dorsal cylindrical sensilla, a dorsoexternal microsensillum and a subapical pit organ. Sensory organ of Ant III with a pair of small microsensilla and two guard sensilla shorter than surrounding chaetae, one on each side. Another microsensillum found in a ventrolateral location. Ant III with 22 common chaetae. Ant II with a small subcylindrical ventral sensillum and 16–17 common chaetae, and some of the basal ones short and fine. Ant I with two subcylindrical ventral sensilla and 12 common chaetae; one of the basal chaetae smaller than the others.

Five omma on each side of head. PAO long and narrow, 3.5 times as long as an omma, with two posterior chaetae ( Fig 10 ). 2/5,5,4 labral chaetae. Maxillary palp bifurcate with three sublobal chaetae.

Dorsal chaetotaxy represented in Figure 3 . Axial chaetotaxy of Th II–Abd V have 6,4/3,3,3,5,2 pairs of mesochaetae respectively. Macrochaetotaxy: 1,1/2,2,3,3,3; similar to type 2 of Fjellberg (1993), but M on Abd I and SA on Abd III slightly longer than surrounding chaetae ( Table 3). Microsensillar chaetotaxy: 1,0/0,0,1 ms freely exposed on the body surface. Th II–Abd V with 3,3/2,2,2,2,4 sensilla shorter than surrounding chaetae. The lower pair of sensilla on Abd V is longer and thicker than the upper pair, set in front of p-row ( Fig 7 ).

Macrochaetae Ordinary L M SA chaetae

Th II 16 ̶ ̶ 11

Th III 17 ̶ ̶ 11

Abd I 17 16 (11) 11

Abd II 18 16 (11) 11

Abd III 18 17 16 11

Abd IV 18 18 17 11

Abd V 17 21 19 11 mucro Dens Ret. Body Max. M ms

Species (1) (2) (3) pigment palp (4) (5) (1) Lateral mucronal lamella. (2) Dens: Number of posterior/anterior chaetae. (3) Retinacle: Number of teeth/basal chaetae. (4) Macrochaetae from Th II to Abd V: 1— 33/33333, 2a––11/22333 2b—11/12233, 3––11/11133. (5) Number of microsensillae from Th II to Abd III. (6) SA: Ratio SA macrochaeta:Abd IV length. (7) Abd IV: Lower sensilla E—equal, L—longer or S—shorter than upper sensilla, T—thicker or N—not thicker than upper sensilla, situated in front of p-row—m or in the p-row—p. (8) B4/5 chaeta on tibiotarsus I/II.

Chaetotaxy of legs I to III: subcoxae I: 1,1,3; subcoxae II: 1,5,5; coxae: 4,9,9; trochanter: 8,8,6; femora: 12,14,14; tibiotarsi: 20,20,22 pointed chaetae respectively. Chaetae A1–A7, B1–B7, C1–C7 and x present on tibiotarsus of leg III. Tibiotarsi of legs I and II with single chaeta B4/5. Claw with no teeth on inner edge. Empodial appendage sharp; its length less than half internal edge of claw.

Ventral chaetotaxy represented in Figure 4 . Head with 3+3 postlabial chaetae. Ventral tube with 3+3 laterodistal chaetae and 2 posterobasal ones. The retinacle with 3+3 teeth and one chaeta on corpus. Subcoxa of furca with 6–9 chaetae on anterior and 4–5 on posterior part. Furca well developed. Manubrium with 9+9 posterior and no anterior chaetae. Dens with three posterior and one anterior chaeta ( Fig 12 ). The mucro with two teeth, with a small lateral lamella from base to subapical tooth.

Discussion. As the previous new species, Folsomides subvinosus sp. nov. belongs to the species group of Folsomides angularis ( Axelson, 1905) and also have lost several ms (10/001). Main differences between F. subvinosus sp. nov. and these species are summarized in Table 4 . The new species is most similar to F. vinosus , but easily separated by the dorsal macrochaetotaxy; The new species has 22333 macrochaetae on Abd I–V, but F. vinosus has 11133 abdominal macrochaetae ( Fig 3 vs 5); these species also differ in the shape of dorsal sensilla on Abd V, lower sensilla longer than upper ones in F. subvinosus sp. nov. and lower sensilla equal in length to upper ones in F. vinosus .

Etymology. Its name reflects the similarity to F. vi no s u s.

Figures

FIGURES 3 – 4. Folsomides subvinosus sp. nov.: 3, habitus and dorsal chaetotaxy; 2, habitus and ventral chaetotaxy. Scale: 0.1 mm.

FIGURES 5 – 8. Folsomides spp.: 5, habitus and chaetotaxy in F. v i no s us, paratype from Canary Is.; 6 – 8, chaetotaxy of Abd IV – VI of F. halshinicus sp. nov. (6), F. subvinosus sp. nov. (7) and F. marchicus (8). Scales: 0.1 mm.

FIGURES 9 – 14. Folsomides spp.: 9 – 11, postantennal organ and omma in F. halshinicus sp. nov. (9), F. subvinosus sp. nov. (10) and F. marchicus (11); 12 – 14, mucrodens in F. subvinosus sp. nov. (12), F. halshinicus sp. nov. (13) and F. marchicus (14).

Tables

TABLE 4. Comparison of the two new Iranian species of Folsomides with the species of F. angularis group, with reduced number of microsensilla on tergites.

angularis (Axelson 1905)	+	(2)3/1	4/1	absent	bifurcate	3	10/001
aridoviator Potapov & Stebaeva 1997 californicus Palacios & Villareal 2013 chichinautzini Kováč & Palacios 1996	+ - +	(3)4/1 (2)3/0 2/0	4/1 3/1 3/1	present absent present	bifurcate simple bifurcate	3 2b 2b	10/000−1 10/001 10/001
insularis Thibaud & Weiner 1997 marchicus (Frenzel 1941) petiti (Delamare 1951)	- + -	2/0 (2)3/0 2/0	3/0 3/1 3/0	present present diffuse	bifurcate bifurcate bifurcate	1 3 3	10/001 10/001 10/000
pocosensillatus Fjellberg 1993 pseudangularis Chen 1985 urumqiensis Hao & Huang 1995 vinosus Fjellberg 1993 halshinicus sp. nov. subvinosus sp. nov.	-?? + - +	2/1 2/1 3/1 3/1 2/0 3/1	3/1 3/0−1 3/1 3/1 3/1 3/1	absent- present present diffuse present diffuse	simple?? bifurcate bifurcate bifurcate	3 2b 2b 3 2a 2a	10/000 10/001 10/001 10/001 10/001 10/001
continued.