Endonura duplex, Smolis & Kuznetsova & Paśnik, 2024
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publication ID |
https://dx.doi.org/10.3897/asp.82.e114038 |
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publication LSID |
lsid:zoobank.org:pub:88A70CAC-692F-48EA-99E3-73D4DAEB15FD |
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persistent identifier |
https://treatment.plazi.org/id/EF8EDEA5-F506-440B-A958-32624FFD6AE8 |
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taxon LSID |
lsid:zoobank.org:act:EF8EDEA5-F506-440B-A958-32624FFD6AE8 |
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treatment provided by |
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scientific name |
Endonura duplex |
| status |
sp. nov. |
Endonura duplex sp. nov.
Figs 37-47, Tables 9a-c, 10 View Figure 37–47
Type material.
Holotype: adult female on slide, Russia, NW Caucasus, Adygeya, Caucasus Nature Reserve, 'Kamennoye More’ ridge, southern slope, 1850 m. alt., mixed forest (pine, birch), coniferous litter, 21.VII.2015, leg. M. Potapov, N. Kuznetsova, A. Kremenitsa, L.Vanyavina (DIBEC). Paratype: subadult male and 2 juveniles on slides, same data as holotype (DIBEC and MSPU).
Diagnosis.
2+2 pigmented eyes. Buccal cone short, labrum not ogival. Head with chaetae A, B, C, D and E. Two chaetae O present. Tubercles Cl and Af separate. Tubercles Dl and (L+So) on head with 6 and 10 chaetae respectively. Tuberles Di on Th. I present. Tubercles De on Th. II and III with 3 and 4 chaetae respectively. Tubercles L on Abd. III and IV with 4 and 7 chaetae respectively. Abd. IV and V with 8 and 3 tubercles respectively. Claw without inner tooth. Tibiotarsi with chaetae B4 and B5 short.
Description.
Body length: 0.55 (juvenile) to 1.55 mm (holotype) (without antennae). - Colour: body pale bluish grey (alive and in alcohol). 2+2 black eyes, in a typical arrangement for the genus (Fig. 38 View Figure 37–47 ). - Chaetal morphology: Dorsal ordinary chaetae of five types: long macrochaetae (Ml), short macrochaetae (Mc), mesochaetae and microchaetae. Long macrochaetae thick, slightly arc-like or straight, narrowly sheathed, feebly serrated, apically rounded or pointed (Figs 38 View Figure 37–47 , 43 View Figure 37–47 , 47 View Figure 37–47 ). Macrochaetae Mc morphologically similar to long macrochaetae, but 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 nearby macrochaetae (Figs 38 View Figure 37–47 , 43 View Figure 37–47 , 46 View Figure 37–47 ). - Antennae: Dorsal chaetotaxy of Ant. III-IV as Fig. 41 View Figure 37–47 and Table 9b. S-chaetae of Ant. IV of medium length and moderately thickened (Fig. 41 View Figure 37–47 ), sensillum sgd relatively long. Apical vesicle distinct, trilobed (Figs 39 View Figure 37–47 , 40 View Figure 37–47 ). Ventral chaetotaxy of Ant. III with 14 ordinary chaetae, sense organ AOIII with long sensillum sgv and short peg (Fig. 42 View Figure 37–47 , Table 9b). - Mouthparts: Buccal cone short with labral sclerifications not ogival (Fig. 44 View Figure 37–47 ). Labral chaetotaxy: 4/2, 4 (Fig. 45 View Figure 37–47 ). Labium with four basal, three distal and four lateral chaetae, papillae x absent. Maxilla styliform, mandible thin and tridentate. - Dorsal chaetotaxy and tubercles: Head with two chaetae O (Fig. 38 View Figure 37–47 , Table 9a). Tubercles Di on Th. I developed. Th. II-III with chaetae De2 and De3 free (Fig. 38 View Figure 37–47 ). On Abd. I-III, the line of chaetae De1-chaeta s not perpendicular to the dorsomedian line. Abd. I-III with chaetae De3 free (Fig. 43 View Figure 37–47 ). On Abd. V tubercle (Di+Di) with 3+3 chaetae. Abd. VI well visible from above (Fig. 43 View Figure 37–47 ). - Ventral chaetotaxy: On head, groups Vea, Vem and Vep with 3, 4, 4 chaetae respectively. Group Vi on head with 6 chaetae. On Abd. IV, furca rudimentary without microchaetae. One chaeta L on Abd. IV free (Fig. 37 View Figure 37–47 ). On Abd. V, chaetae Vl and chaetae L’ present. Legs: Chaetotaxy of legs as in Table 9c. Claw without internal tooth. On tibiotarsi, chaeta M present and chaetae B4 and B5 relatively short and pointed.
Etymology.
The name duplex is derived from the presence of two chaetae O on head.
Remarks.
E. duplex sp. nov. differs from all other Endonura by the presence of two cephalic chaetae O. Besides this character, the new species strongly resembles E. agnieskae Smolis & Skarżyński, 2020, E. alticola (Stach, 1951) and E. reticulata (Axelson, 1905). However, the differences between the new species and the outlined taxa include a number of characters: Shape of labrum (ogival in Endonura alticola , not ogival in others), number of prelabral chaetae (two in Endonura alticola , four in others), number of lateral labial chaetae (three in Endonura agnieskae , four in others), length of cephalic chaetae A and Ocp (chaeta A longer than Ocp in Endonura duplex and Endonura alticola , chaeta A shorter than Ocp in Endonura reticulata , equal in Endonura agnieskae ), presence of tubercle Di on Th. I (present in Endonura duplex , present and fused with tubercle De in Endonura agnieskae and Endonura alticola , usually absent in Endonura reticulata ), position of chaeta Di3 on Th. II-III (within tubercle Di in Endonura alticola , free in others), position of chaeta De2 on Abd. I-III (free in Endonura reticulata , within tubercle De in others), position of chaeta s on Abd. I-III (line of chaeta De1-chaeta s not parallel to dorsomedial line in Endonura reticulata , parallel in others), fusion of tubercles Di on Abd. IV (present in Endonura alticola , absent in others) and presence of free chaeta L on Abd. IV (present in Endonura duplex , absent in others). The differences between the species mentioned in the remarks are summarised in Table 10.
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