Endonura armeniaca, 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/554E1A9B-F28D-4ED2-8C7B-4B72DC48CE68 |
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taxon LSID |
lsid:zoobank.org:act:554E1A9B-F28D-4ED2-8C7B-4B72DC48CE68 |
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treatment provided by |
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scientific name |
Endonura armeniaca |
| status |
sp. nov. |
Endonura armeniaca sp. nov.
Figs 1-15, Tables 3a-c, 4 View Figure 1–15
Type material.
Holotype: adult female on slide, Armenia, road to Agveran village (40°29 ´32.6´´ N; 44° 35 ´35.1´´ E), mountain oak forest, litter and soil, 24.V.2016, leg. B. Efeikin (DIBEC). Paratype: adult female on slide, same data as holotype.
Diagnosis.
2+2 pigmented eyes. Buccal cone long, labrum ogival. Head with chaetae B, C and D. Chaetae A, O, Ocp and E absent. Tubercles Cl and Af separate. Tubercles Dl and (L+So) on head with 4 and 7 chaetae respectively. Tubercles Di on Th. I absent. Tubercles De on Th. II and III with 3 chaetae. Tubercles L on Abd. III and IV with 3 and 5 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: 1.1 to 1.2 mm (without antennae) (holotype: 1.2 mm). - Colour: pale bluish grey (alive and in alcohol). 2+2 black eyes, in a typical arrangement for the genus (one anterior, one posterior, Fig. 1 View Figure 1–15 ). - Chaetal morphology: Dorsal ordinary chaetae of five types: long macrochaetae (Ml), short macrochaetae (Mc), mesochaetae and microchaetae. Long macrochaetae thick, slightly arched or straight, narrowly sheathed, feebly serrated, apically rounded (Figs 1 View Figure 1–15 , 10 View Figure 1–15 , 14 View Figure 1–15 ). Macrochaetae Mc 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 nearby macrochaetae (Figs 1 View Figure 1–15 , 10 View Figure 1–15 , 13 View Figure 1–15 ). - Antennae: Dorsal chaetotaxy of Ant. as in Table 3b. S-chaetae of Ant. IV of medium length and moderately thickened (Fig. 3 View Figure 1–15 ), sensillum sgd long and thickened (Fig. 8 View Figure 1–15 ). Apical vesicle distinct, trilobed (Figs 4 View Figure 1–15 , 5 View Figure 1–15 ). Ventral chaetotaxy of Ant. III with 14 ordinary chaetae, sense organ AOIII with long sensillum sgv and short peg (Fig. 9 View Figure 1–15 ). - Mouthparts: Buccal cone long with labral sclerifications ogival (Fig. 11 View Figure 1–15 ). Labrum chaetotaxy: 4/2, 4 (Fig. 12 View Figure 1–15 ). Labium with four basal, three distal and four lateral chaetae, papillae x absent. Maxilla styliform (Fig. 3 View Figure 1–15 ), mandible thin with two basal and two apical teeth (Fig. 2 View Figure 1–15 ). - Dorsal chaetotaxy and tubercles: Chaetotaxy of head reduced, chaetae A, E, O, Ocp, Dl3, Dl6, So2, L2 and L3 absent (Figs 1 View Figure 1–15 , 6 View Figure 1–15 ; Table 3a). Tubercles Di on Th. I not differentiated (Fig. 1 View Figure 1–15 ). Thorax with chaetae De2 free (Fig. 1 View Figure 1–15 ). On Abd. I-III, the line of chaetae De1-chaeta s not perpendicular to the dorsomedian line. On Abd. V tubercle (Di+Di) with 2+2 chaetae (Fig. 10 View Figure 1–15 ). Abd. VI partially visible from above (Fig. 10 View Figure 1–15 ). - Ventral chaetotaxy: On head, groups Vea, Vem and Vep with 2, 2, 4 chaetae, respectively (Fig. 6 View Figure 1–15 ). Group Vi on head with 6 chaetae. On Abd. IV, furca rudimentary without microchaetae. On Abd. IV, tubercle L with 5 chaetae (Fig. 15 View Figure 1–15 ). On Abd. V, chaetae Vl present and chaetae L’ absent. Legs: Chaetotaxy of legs as in Table 3c. Claw without internal tooth. On tibiotarsi, chaeta M present, chaetae B4 and B5 relatively short and pointed.
Etymology.
The name armeniaca is derived from Armenia, the country where the species was found.
Remarks.
Among the known members of the genus, E. armeniaca sp. nov. is distinguished by an extraordinary reduction of dorsal cephalic chaetotaxy. This includes the absence of chaetae A, O, E, Ocp, Dl3, L2, L3 and So2, as well as the presence of an ogival labrum and the absence of an internal tooth on the claws. Morphologically, the new species appears to be most similar to E. schwendingeri Smolis and Skarżyński, 2020, a species recently described from northwestern Iran ( Smolis and Skarżyński 2020). For instance, both species are identified by the absence of chaetae A and Ocp. However, they differ in several aspects, such as the shape of the labrum (ogival in Endonura armeniaca , not ogival in Endonura schwendingeri ), the number of chaetae Dl on the head (four in Endonura armeniaca , five in Endonura schwendingeri ), the number of ordinary chaetae De on Th. III (two in Endonura armeniaca , three in Endonura schwendingeri ), the number of ordinary chaetae De on Abd. I-III (two in Endonura armeniaca , three in Endonura schwendingeri ), the number of chaetae L on Abd. III and IV (three and five in Endonura armeniaca and two and four in Endonura schwendingeri , respectively), the number of chaetae Di on the penultimate abdominal segment, with Endonura armeniaca having 2+2 and Endonura schwendingeri having 3+3. Additionally, Endonura schwendingeri has an internal tooth on its claws, which is absent in Endonura armeniaca .
E. armeniaca sp. nov. is also similar to E. cretensis (Ellis, 1976) and E. quadriseta Cassagnau and Peja, 1979, which were described from Greece and recently redescribed ( Smolis et al. 2007, Smolis and Kaprus’ 2009). The differences between E. armeniaca sp. nov. and the related species mentioned above are summarised in Table 4.
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