Antennal troglomorphy in Arrhopalitidae (Collembola: Symphypleona) with the description of two new cave Pygmarrhopalites Vargovitsh, 2009 species from the Arabika Massif in the Caucasus Author Vargovitsh, Robert S. text Zootaxa 2025 2025-08-07 5673 4 523 556 https://doi.org/10.11646/zootaxa.5673.4.3 journal article 312147 10.11646/zootaxa.5673.4.3 bac1bb01-04c5-4e61-9d47-50a01967360a 1175-5326 16982611 9AE749B4-1845-40A1-A9C4-AC94ACC7FABA

TABLE 1. Lengths (in µm) and angles for body parts of adult types of Pygmarrhopalites arbaicus sp. nov. and P. trisetosus sp. nov.

Body part	Pygmarrhopalites arbaicus sp. nov.				Pygmarrhopalites trisetosus sp. nov.
......continued on the next page
	Females, n=10		Males, n=3		Females, n=7		Males, n=2
	min–max	mean	min–max	mean	min–max	mean	min–max	mean
Total (without appendages)	1280–1550	1440	1090–1250	1180	1180–1408	1277	960–1016	988
Head	470–537	503	362–415	391	395–480	429	338–344	341
Head dorsum longest seta	30–38	34	26–34	29	37–52	47	38–38	38
Eye diameter	14–19	16.2	13.2–16	14.4	15–17	16	11–12	11.5
Antenna	1115–1280	1210	919–1109	1009	1045–1368	1193	1000–1010	1005
Ant I	56–66	63	45–58	51	45–67	56	48–48	48
Ant II	144-176	162	120–147	133	146–202	166	135–135	135
Ant III	263–289	276	200–252	230	241–350	292	237–240	239
Ant IV	658–780	736	572–675	621	624–795	695	592–610	601
Ant IV basal subsegment	212–241	227	179–200	189	270–398	335	288–298	293
Ant IV apical subsegment	72–83	80	70–80	74	100–119	108	95–100	98
Ant III organ sensory rods	7.4–11.0	8.7	7.4–8.4	8	9.9–10.7	10.2	8.5–9.4	9
Tibiotarsus I	375–434	406	284–334	316	341–468	399	325–344	335
Tibiotarsus II	374–440	409	286–340	319	332–448	390	320–331	326
Tibiotarsus III	451–534	491	332–403	378	400–549	472	388–399	394
Claw I	72–89	81	59–69	64	66–80	75	60–62	61
Claw II	69–87	78	56–68	62	62–80	72	56–59	58
Claw III	68–85	78	55–68	61	54–69	63	50–52	51
Empodium I	70–86	79	52–67	58	40–52	45	35–36	35
Empodium II	62–75	71	35–56	48	37–48	43	32–34	33
Empodium III	47–62	53	35–50	42	36–44	41	32–32	32
Th II seta m1	32–40	34	25–26	26	26–54	42	26–?	26
Th II sensillum a	5.3–9	7.7	7–7.7	7.4	7–7.2	7.1	?	?
Th III sensillum a	11.2–14	12	11.8–12.6	12.1	17.5–17.6	17.6	?	?
Trichobothria AB distance	72–103	89	63–83	73	66–78	72	?	?
Trichobothria BC distance	95–119	104	74–103	88	92–134	106	?	?
Trichobothria ABC angle	150–168o	158o	149–165o	157o	147–148o	148o	?	?
Abd IV longest seta	95–113	105	86–104	97	87–105	94	75–83	79
Abd VI longest seta	80–97	90	56–67	61	48–80	62	51–56	54
App anales: length	46–55	51	-	-	31–38	35	-	-
	Females, n=10		Males, n=3		Females, n=7		Males, n=2
	min–max	mean	min–max	mean	min–max	mean	min–max	mean
App anales: basal shaft width	3.2–3.9	3.6	-	-	3–4.2	3.6	-	-
App anales: palmated part width	14–24	19.1	-	-	10–11.7	10.8	-	-
Furca	746–863	807	569–694	640	675–855	746	603–617	610
Manubrium	267–323	304	208–254	237	227–300	269	216–216	216
Dens	315–372	336	239–292	267	300–390	331	264–280	272
Mucro	175–198	191	132–164	149	150–188	169	138–141	140
Dens spine Ie: length	21–29	25	14–21	17	16–22	19	18–19	19
Dens spine Ie: width	9.4–13	11	5.2–9.5	7.3	6–8.4	7.3	6–7	6.5
Dens spine IIpe: length	20–29	24	15–21	18	24–30	28	20–26	23
Dens spine IIpe: width	9.4–11	10.2	5.2–9.5	7.3	4.3–6.7	5.7	5.3	5.2