Cryptonura sariensis Arbea, Yahyapour & Shayanmehr, 2022

Yahyapour, Eliye, Shayanmehr, Masoumeh, Vafaei-Shoushtari, Reza & Arbea, Javier I., 2022, New species and records of Neanurinae (Collembola: Neanuridae) from Mazandaran Province (Northeastern Iran), with a key to Iranian species of the subfamily, Zootaxa 5087 (2), pp. 253-274 : 261-265

Cryptonura sariensis Arbea, Yahyapour & Shayanmehr sp. nov.

Figs 26−36 , Tab. 3a & b

Type locality. Iran, Mazandaran Province, Sari county, Zare forest (36º 32ʹ 44ʺ N, 53º 07ʹ 53ʺ E, 113 m a.s.l.) and Lulen forest (36º14ʹ20ʺ N, 53º39ʹ10ʺ E, 115 m a.s.l.) .

Type material. Holotype: male on slide in MNCN. Iran: Mazandaran Province, Sari county, Zare forest , 12 April 2016, soil and leaf litter, Berlese extraction, Eliye Yahyapour leg. Paratype: juvenile on slide in SANRU. Iran: Mazandaran Province, Sari county, Lulen forest , 15 April 2016, soil and leaf litter, Berlese extraction, Eliye Yahyapour leg.

Etymology. The species was named after the type locality, Sari county.

Diagnosis. Habitus typical of the genus Cryptonura . Colour of the body bluish-gray, 2+2 eyes darkly pigmented. Dorsal tubercles present and well developed, roundish in shape. Buccal cone short, labrum non-ogival. Head with chaetae A, B and D. Chaetae C, E and O absent. Tubercles Af and Cl separate. Tubercles Dl and (L+So) on head with 3 and 8 chaetae respectively. Tubercle Di on Th I with 1 chaeta. Tubercles De on Th II and III with 2+s and 3+s chaetae respectively. Tubercles L on Abd III and IV with 3 and 5 chaetae respectively. Macrochaetae Ml relatively long. Cryptopygy present, poorly developed. Claw without inner tooth.

Description. Habitus typical of the genus. Head and tergite tubercles well developed. Body length (without antennae): 1.2 mm ♂. Colour of the body bluish-gray. 2+2 eyes relatively small (diameter of ocellus equal to diameter of alveolus Ocp), darkly pigmented ( Fig. 26 ).

Chaetal morphology. Dorsal ordinary chaetae of five types: Macrochaetae Ml relatively long, strongly thickened, almost cylindrical, arclike or straight, narrowly sheathed, apically rounded; lateral macrochaetae longer, less serrated and thinner apically; short macrochaetae Mc and Mcc thickened, straight and blunt; macrochaetae densely covered by minute denticles. Mesochaetae smooth or feebly serrated and pointed. Smooth microchaetae shorter, acuminate and thin. S-chaetae of tergites thin, smooth and slightly shorter than closest Mc ( Fig. 32 ).

Antennae. Antennae shorter than head. Chaetotaxy of antennae as in Tab. 3b and in Figs 28−29 . Ant I with 7 chaetae: 2 long (Ml) and 3 shorter (Mc) thick and ciliate, others smooth. Ant II with 12 chaetae: one long (Ml) and 2 shorter (Mc) thick and ciliate, and others smooth. Ant III and IV dorsally fused. Ant III with 17 ordinary chaetae (group d with 5 chaetae) and 5 S-chaetae of AIIIO, guard chaetae Sgd and Sgv slightly longer and slender than S- chaetae of Ant IV. Eight subequal S-chaetae (S1–S8) on Ant IV; Ant IV organite as a very small rod, almost entirely burried in the integument; apical bulb simple or feebly lobed, fused to Ant IV tip.

Mouthparts. Buccal cone short. Labrum non-ogival. Labium with 11 chaetae: a1, a2, p2, E, F, G, b, c, d, e and f. Labial papillae x not detected ( Fig. 30 ). Maxilla styliform ( Fig. 35 ), mandible with five teeth, being two basal stronger, unequal teeth and three unequal apical teeth ( Fig. 36 ).

Ventral side of head: Vi=5, Ve=10- 11(4 Vea, 3 Vem and 3- 4 Vep).

Antenna: Ant I, II with 7, 12 chaetae.

Ant III with 17 ordinary chaetae (5 ve, 3 vc, 4 vi and 5 d), 5 S-chaetae (AIIIO).

Ant IV dorsally with the complete set of chaetae (or, 8 S, i, 12 mou, 3 brs).

Ant IV ventrally with the complete set of chaetae (3 brs, 2 iv; ap: 6 bs, 5 miA; ca: 3 bs, 3 miA; cm: 3 bs, 1 miA; cp: 7 miA, 1 brs).

Dorsal chaetotaxy and tubercles. Chaetotaxy of head as in Tab. 3a and Figs 26−27 and 31 , with 12 chaetal groups: Cl, Af, 2 Oc, 2 Di, 2 De, 2 Dl, 2 (L+So). Tubercles Cl and Af separate; chaetae C, E and O absent ( Fig. 32 ); tubercle Dl with 3 chaetae; tubercle (L+So) with 9 chaetae. Chaetotaxy of Th and Abd as in Tab. 3b and in Figs 26–27 and 32 . Number of tubercles from Th I to Abd VI on half notum is: 3,4,4/4,4,4,4,2,1. S-chaetotaxic formula on Th I to Abd V as 0,2+ms,2/1,1,1,1,1; body s-chaeta thin and smooth, slightly shorter than closest Mc ( Fig. 32 ). Tubercles Di on Th I with 1 chaeta; tubercles Di on Th II–III with 2 chaetae; chaetae De2 on Th II–III comprised within tubercle De; chaetae De3 on Abd I–III connected with tubercle De ( Fig. 32 ); tubercle L on Abd III and IV with 3 and 5 chaetae respectively; tubercles Di on Abd V with chaetae Di2 as Mc or mi and Di3 absent ( Figs 26−27 and 33 ). Cryptopygy poorly developed; Abd VI hardly visible from dorsal side ( Figs 26−27 ).

Ventral chaetotaxy. On head, groups Vea, Vem and Vep with 3, 3, 1 chaetae respectively; group Vi with 5 chaetae ( Fig 30 ). On Abd IV, furcal vestige with 4 chaetae, devoid of mi but with a small posterior area of primary granulation. Ventral chaeta L' on Abd V absent ( Figs. 26–27 ). Male with thick and forked chaetae (male ventral organ) on Abd IV: 2Vei and 2Vec ( Fig. 34 ).

Legs. Chaetotaxy of legs as in Tab. 3b . Tibiotarsi with chaetae B4 and B5 short. Claw without inner tooth.

Ratios. Chaetae A: B: Ocm: Ocp: Di1 on Abd IV: Di1 on Abd V: Claw III = 18: 30: 29: 31: 41: 38: 10

Remarks. Although Cryptonura sariensis sp. nov. is described based only on two specimens (a male and a juvenile), it is a well characterized species. As soon as new material is found, amendments or new information will be made to this taxon in further publications. C. sariensis sp. nov. runs in the most recent key to Cryptonura species ( Smolis et al. 2012) to C. anthrenoidea ( Ellis, 1976) from Greece. Both species are readily distinguished from most members of the genus by a mandible with 5 (new species) or 6 ( C. anthrenoidea ) teeth, chaeta C on head absent and tubercle Di on Abd V with 2 chaetae. C. sariensis sp. nov. can be easily separated from C. anthrenoidea by the presence of blue body colour (white in C. anthrenoidea ), the absence of inner tooth on unguis (present in C. anthrenoidea ) and a reduced body chaetotaxy: 3 Dl chaetae on head, 2 Di chaetae on Th II–III, 1/2/2 De ordinary chaetae on Th I–III, 2 De ordinary chaetae on Abd I–III and 4 De+Dl+L ordinary chaetae on Abd V (5, 3, 2/2/3, 3 and 5, respectively, in C. anthrenoidea ). The main diagnostic characters of these species are summarized in Tab. 5 .

Figures

FIGURES 26–27. Cryptonura sariensis sp. nov.: dorsal and ventral chaetotaxy. Scale: 0.2 mm.

FIGURES 28–36. Cryptonura sariensis sp. nov.: 28−29, Ant III−IV in dorsal (28) and ventral view (29); 30, labium; 31, tu- bercles Cl and Af on head; 32, De tubercle on Th II; 33, Di tubercle on Abd V; 34, medial ventral chaetotaxy of Abd III−V on a male; 35, maxilla; 36, mandible. Scales: 0.05 mm (28−34), 0.02 mm (35−36).

Tables

TABLE 3a. Cephalic chaetotaxy of Cryptonura sariensis sp. nov.

Dorsal tubercle	Number of chaetae	Types of chaetae	Names of chaetae
Cl	4	Ml	F
		Mc	G
Af		Ml	B
		Mc	A
		Mcc or mi	E
Oc	3	Mc	Ocp
		Ml	Ocm
		Mcc or mi	Oca
Di	2	Ml	Di1
		Mcc or mi	Di2
De	2	Ml	De1
		Mcc	De2
Dl	3	Ml	Dl1, Dl5
		Mc	Dl4
(L+So)	7	Ml	L1, L3, So1
		me	L4, So3–5