Hesperentomon tianshanicum Martynova, 1970

Shrubovych, Julia, 2010, Redescription of Hesperentomon tianshanicum Martynova, 1970 (Protura: Acerentomata, Hesperentomidae) and key to Hesperentomon species, Zootaxa 2720, pp. 28-34 : 28-31

Hesperentomon tianshanicum Martynova, 1970

Figs. 1–14 , Tables 1–2 .

Material examined. The species was described on the basis of 12 specimens collected in Tian-Shan Mts. ( Kyrgyzstan) on the northern slope of Terske Alatau crest in the spruce forest zone, about 2500 m elev., 17- 20.05.1965, coll. P. P. Vtorov. The holotype is a male. Six females and 4 males are labeled " Hesperentomon tianshanicum sp. n. paratip/ Kirgiziya Tian Shan 17-V-1965 2530 m Vtorov". The slides with specimens are marked as M3, M4, M8, M9, M10 and M11. The type materials of H. tianshanicum are preserved in the Zoological Institute of the Russian Academy of Sciences in St. Petersburg, Russia.

Redescription. Head with short setae ( Fig. 1 ). Submedial (sma) and sublateral (sla) additional setae on posterior part of head present. Pseudoculus elongate, with long posterior extension, PR 10–14 ( Fig. 2 ). Two additional pairs of pores between pseudoculi and in posterior part of head present. Maxillary gland with elongate calyx and short (0.4–0.7 of calyx length) posterior filament, CF 3–4 ( Fig. 4 ). Maxillary palp with slender basal sensilla, dorsal sensillum longer (8 μm) than ventral sensillum (6 μm) ( Fig. 3 ). Labial palp well developed, without basal sensillum; inner margin of labium smooth.

Chaetotaxy formula given in Table 1 . Nota with short setae, P5 and P5a on meso- and P5 on metanotum minute, sensilliform ( Fig. 1 ). Accessory setae setiform, not modified, P1a absent; length ratio of P1: P2 on mesonotum as 1: 1.2–1.8. Meso- and metanotum with pores sm and sl; sternites with simple median pore, situated on prosternum posteriorly, and on meso- and metasternum anteriorly to level of setae M. All setae on thoracic sternites of normal setiform shape.

Dorsal Ventral Foretarsus ( Figs. 7, 8 ) with additional sensilla b'2 and c'2; t1 and t2 thin; t3 long and thicker than other sensilla. Relative length of sensilla: b'2 <f <c = c'1 <a = b = d = e = g = a' = b'1 = c'2 <t1 = t3 <t2. Setae β 1 and ä4 setiform, subequal in length to setae ä2, ä3 and ä5. Claw and empodial appendage relatively short; inner tooth of claw absent. BS 1.0–1.1, TR 3.5–3.7, EU 0.1–0.2.

Pores psm and psl present on tergites I–VII, al on II–VII and without surrounding denticles, pl on I–III. All setae on tergites setiform.

Abdominal legs typical of genus, with 4 setae. All sternal setae of normal shape. Sternites I–VI with single medial pore, sternite VII with 3 (one medial and two sublateral) pores situated near its hind margin ( Fig. 6 ).

Abdominal segment VIII with distinct, individually variable lineation or reticulation; striate band absent, single granulated line present. Comb VIII with 8–10 small teeth ( Fig. 5 ). Tergite with pores psm and pl ( Fig. 11 ); sternite with single median pore situated usually on its hind margin. Hind margin of sternite and laterotergites smooth ( Fig. 12 ). Abdominal segments IX–XII distinctly lineated; some lines with small, variable teeth or cilia-like processes. Tergites X and XI with broad, coarsely serrated posterior lamella ( Fig. 13 ). All setae of normal shape. Bases of setae of segments X-XII lacking surrounding ciliate processes. Tergite IX without pore, tergites X–XII with single median pore situated on hind margin of tergites X–XI and in anterior part of tergite XII ( Fig. 14 ). Sternites IX and X with single median pore, XI without pores, XII with 1+1 anterolateral pores.

Female squama genitalis with weakly three-lobed acrostyli ( Fig. 9 ); male squama genitalis with 4+4 setae ( Fig. 10 ).

Chaetal variability (10 adults): asymmetrical duplication of P4a on tergite V (1 specimen); asymmetrical absence of P1 on tergite VI (1 sp-n); absence of Pc on sternite VI and symmetrical absence of 1a on sternite X (1 sp-n).

Body measurements (in μ m). Head 140–160, pseudoculus 12–14, posterior part of maxillary gland 35–47, mesonotal P 1 13–16, mesonotal P 2 19–24, foretarsus 87–96, claw 25–26, empodial appendage 3–4.

Figures

FIGURES 1 – 11. Hesperentomon tianshanicum Martynova, 1970. 1 — head; 2 — pseudoculus; 3 — maxillary palp; 4 — canal of maxillary gland; 5 — comb of tergite VIII; 6 — sternite VII; 7 — foretarsus, exterior view; 8 — foretarsus, interior view; 9 — female squama genitalis; 10 — male squama genitalis. Arrows show pores. Fig. 1 — holotype, Fig. 9 — paratype M 8, others—paratype M 11. Scale bar: 20 µm.

FIGURES 11 – 14. Hesperentomon tianshanicum Martynova, 1970. Paratype M 11. 11 — tergite VIII; 12 — sternite VIII; 13 — tergites IX – XII, right side; 14 — sternites IX – XII, right side. Arrows show pores. Scale bar: 20 µm.

Tables

TABLE 1. Body chaetotaxy of Hesperentomon tianshanicum Martynova, 1970.

	Setae	Formula	Setae	Formula
Th. I	1, 2	4	A1, 2, M1 P1, 2, 3	4 + 2 ------------ 6
Th. II	A2, 4, M P1, 2, 2a, 3, 3a, 4, 5, 5a	6 ------ 16	A 2, 3, M Pc, 1, 2	4 + 2 ------------ 5
Th. III	A2, 4, M P1, 2, 2a, 3, 3a, 4, 5	6 ------ 14	A 2, 3, 4, M Pc, 1, 2	6 + 2 ------------ 5
Abd. I	A1, 2 P1, 2, 2a, 3, 4	4 ------ 10	A1, 2 P1, 2	4 --- 4
Abd. II–III	A1, 2, 4, 5 P1, 2, 3, 4, 4a, 5	8 ------ 12	A1, 2 Pc, 1a, 2	4 --- 5
And. IV–VI	A1, 2, 4, 5 P1, 2, 3, 4, 4a, 5	8 ------ 12	A1, 2 Pc, 1, 1a, 2, 3	4 --- 9
Abd. VII	A1, 2, 4, 5 P1, 1a, 2, 3, 3a, 4, 4a, 5	8 ------ 16	A1, 2 Pc, 1, 1a, 2, 3	4 --- 9
Abd. VIII	A1, 2, 5 P1, 1a, 2, 2a, 3, 3a, 5	6 ------ 14	1, 1a, 2	6
Abd. IX	1, 1a, 2, 2a, 3, 3a, 4	14	1, 1a, 2	6
Abd. X	1, 2, 2a, 3, 3a, 4	12	1, 1a, 2	6
Abd. XI	1, 2, 3, 4	8		6
Abd. XII		9		8