Neanura persica 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 : 266-269

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Neanura persica Arbea, Yahyapour & Shayanmehr

sp. nov.

Neanura persica Arbea, Yahyapour & Shayanmehr   sp. nov.

Figs 37−48 View FIGURES 37–41 View FIGURES 42–48 , Tab. 4 View TABLE 4

Type locality. Iran, Mazandaran Province, Kiyasar county, Langar forest , 36º14ʹ20ʺ N, 53º39ʹ10ʺ E, 1800 m a.s.l. GoogleMaps  

Type material. Holotype: female on slide in MNCN. Iran: Mazandaran Province, Kiyasar county, Langar forest , 29 April 2016, soil and leaf litter, Berlese extraction, Eliye Yahyapour leg.   Paratypes: 3 females and 1 male on slide in MNCN and SANRU, same data as for holotype   .

Other material examined. One juvenile specimen. Iran: Mazandaran Province, Babol county, Filband forest , 36º22ʹ12ʺ N, 52º30ʹ45ʺ E, 1950 m a.s.l., 25 August 2016, soil and leaf litter, Berlese extraction, Eliye Yahyapour leg. GoogleMaps  

Etymology. The name refers to Persia (today Iran).

Diagnosis. Habitus typical of the genus Neanura   . Dorsal tubercles present and poorly developed. Body bluish grey. Buccal cone short, labrum non-ogival. Head without chaetae E and Ocp. Tubercles Di Th I absent. Th II−III with chaeta Di3 and De2 free. Abd I−III with chaetae De3 free. Tubercle (Di + Di) of Abd V with 3 + 3 chaetae, chaetae Di3 as mi. Cryptopygy absent. Male ventral organ absent.

Description. Habitus typical of the genus. Head and tergite tubercles poorly developed. Body length (without antennae): 1.17 to 1.58 mm females (holotype female: 1.35 mm), 1.15 mm male. Colour of the body bluish grey. 3+3 medium black eyes, in a typical arrangement for the genus (two anterior and one posterior).

Chaetal morphology. Dorsal ordinary chaetae of five types: long macrochaetae (Ml), short macrochaetae (Mc), very short macrochaetae (Mcc), mesochaetae and microchaetae (mi). Long macrochaetae relatively thick, slightly arc-like or straight, narrowly sheathed, feebly serrated, apically pointed or rounded. Macrochaetae Mc and Mcc morphologically similar to long macrochaetae, but much shorter. Mesochaetae similar to ventral chaetae, thin, smooth and pointed. Microchaetae similar to mesochaetae, but shorter. S-chaetae of tergites thin, smooth and short, notably shorter than closest Mc.

Antennae. Antennae shorter than head. Chaetotaxy of antennae as in Tab. 4b View TABLE 4 and in Figs 39−40 View FIGURES 37–41 . Ant I with 7 chaetae: 3 long, thick and ciliate (Ml), others smooth, and few subcuticular reticulations. Ant II with 11 chaetae: 4 long, thick and ciliate (Ml), and others smooth. Ant III and IV dorsally fused. Ant III with 18 ordinary chaetae (group d with 5 chaetae) and 5 S-chaetae of AIIIO, guard chaetae Sgv slightly longer and slender than S-chaetae of Ant IV. Eight subequal and moderately thickened S-chaetae (S1–S8) on Ant IV ( Fig. 39 View FIGURES 37–41 ); Ant IV organite as a very small rod, almost entirely burried in the integument; apical bulb distinct, trilobed, fused to Ant IV tip.

Mouthparts. Buccal cone relatively short with labral sclerifications nonogival. Labrum chaetotaxy: 4/2, 2 ( Fig. 41 View FIGURES 37–41 ). Labium with four basal (E, F, G, f), three distal (a1, a2, p2) and four lateral chaetae (b, c, d, e), papillae x absent. Maxilla styliform, mandible thin and tridentate.

Dorsal chaetotaxy and tubercles. Chaetotaxy of head reduced, as in Tab. 4a View TABLE 4 and Figs 37 View FIGURES 37–41 and 44 View FIGURES 42–48 , with 11 chaetal groups: Cl+Af, 2 Oc, 2 Di+De, 2 ½Dl, 2 ½Dl+L and 2 So). Tubercles Cl and Af fused ( Fig. 44 View FIGURES 42–48 ). Chaetae E and Ocp absent. Chaetotaxy of Th and Abd as in Tab. 4b View TABLE 4 and in Figs 37–38 View FIGURES 37–41 and 45−47 View FIGURES 42–48 . Number of tubercles from Th I to Abd VI is: 4,8,8/8,8,8,8,3,2. S-chaetotaxic formula on Th I to Abd V as 0,2+ms,2/1,1,1,1,1. Tubercles Di on Th I not differentiated. Thorax and abdomen with free chaetae. On Th II−III chaetae De2 and Di3 as free mi/Mccc ( Figs 45−46 View FIGURES 42–48 ). Abd I−III with chaetae De3 as free mi ( Fig. 38 View FIGURES 37–41 ). On Abd I−III, the line of chaetae De1−chaeta s parallel to the dorsomedian line ( Fig. 38 View FIGURES 37–41 ). On Abd V, tubercles Di fused along midline and with 3 + 3 chaetae, chaetae Di3 as mi ( Fig. 47 View FIGURES 42–48 ). No cryptopygy, Abd VI well visible from above ( Fig. 38 View FIGURES 37–41 ).

Ventral chaetotaxy ( Figs 42−43 View FIGURES 42–48 ; Tab. 4b View TABLE 4 ) On head, groups Vea, Vem and Vep with 4, 3, 4 chaetae, respectively; group Vi with 6 chaetae ( Fig. 42 View FIGURES 42–48 ). On Abd IV, furcal rudiment with 5−6 chaetae, devoid of mi but with a small posterior area of primary granulation. On Abd V, chaetae Vl and L’ present ( Fig. 43 View FIGURES 42–48 ).

Legs. Chaetotaxy of legs as in Tab. 4b View TABLE 4 . Claw without internal tooth. On tibiotarsi, chaeta M present and chaetae B4 and B5 relatively short and pointed ( Fig. 48 View FIGURES 42–48 ).

Ratios. Chaetae A: B: Ocm: Ocp: Di1 on Abd IV: Di1 on Abd V: Claw III = 13: 15: 18: −: 19: 23: 10.

Remarks. Neanura persica   sp. nov. is most similar to N. pallida Deharveng, 1979   , N. minuta Gisin, 1963   and N. deharvengi Smolis et al., 2018   , by the presence of chaetae L’ on Abd V, the absence of chaetae Ocp on the head and tubercles Di on Th I. Besides the unique character of the new species, the fusion of Cl and Af tubercles on the head, these species can additionally be distinguished by the following features: coloration (in N. persica   sp. nov., N. deharvengi   and N. pallida   , whitish to pale bluish; in N. minuta   , dark bluish), chaetotaxy of head (in N. deharvengi   , chaetae A and C absent; in the other species, present. In N. persica   sp. nov. and N. deharvengi   , chaetae E absent; in N. pallida   and N. minuta   , present), number of ordinary chaetae De on Th II and III (in the new species and N. deharvengi   , 2,2, respectively; in N. pallida   , 2,3; in N. minuta   , 3,4), number of ordinary chaetae De on Abd I–III (in N. deharvengi   , 2; in the other species, 3), number of chaetae L on Abd IV (in the new species, 6; in N. pallida   and N. minuta   , 5; in N. deharvengi   , 4), number of chaetae Di on Abd V (in N. deharvengi   , 2+2; in the other species, 3+3), number of ordinary chaetae De+Dl+L on Abd V (in N. deharvengi   , 5; in the other species, 6) and number of tubercles on Abd V (in the new species and N. deharvengi   , 3; in N. pallida   and N. minuta   , 4).

Since the new species described above is characterized by one character unknown in other members of the genus, i.e., the fusion of cephalic tubercles Cl and Af, the currently accepted diagnosis of the genus as proposed by Smolis et al. (2018) is emended here, to include in the genus Neanura   the species with the tubercles Af and Cl on head separate or fused.

Ventral side of head: Vi=6, Ve=11 (4Vea, 3 Vem, 4 Vep).

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

Ant III with 18 ordinary chaetae (5 ve, 4 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: 8 bs, 5 miA; ca: 2 bs, 3 miA; cm: 3 bs, 1 miA; cp: 8 miA, 1 brs).

TABLE 4a. Cephalic chaetotaxy of Neanura persica sp. nov.

Dorsal tubercle Number of chaetae Types of chaetae Names of chaetae
Cl+Af 12 Ml A, B, F
    Mc/Mcc C, G
    mi D
Oc 2 Ml Ocm
    mi Oca
Di+De 4 Ml Di1, De1
    mi Di2, De2
½ Dl 3 Mc Dl1
    mi Dl2, Dl6
(½ Dl+L) 6 Ml Dl5, L1
    me Dl3, Dl4, L3, L4
So 5 Ml So1
    me So3- 6

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