Studies on the genus Aporcelaimellus Heyns, 1965 (Nematoda, Dorylaimida, Aporcelaimidae). Four atypical species with simple uterus from Southern Iberian Peninsula Author Álvarez-Ortega, Sergio Author Abolafia, Joaquín Author Peña-Santiago, Reyes text Zootaxa 2013 3630 3 401 423 journal article 10.11646/zootaxa.3630.3.1 68f2c8d8-1d71-49ae-9d9c-b0d1aad514b6 1175-5326 224094 CA72AB3F-3160-4682-947A-81DD042D2FE6 Aporcelaimellus salicinus Álvarez-Ortega, Subbotin & Peña-Santiago, 2013 ( Figs 5 E, F & 8) Material examined. Thirty-six females; in variable state of preservation. Measurements. See Table 4. SEM observations of lip region: Lip region offset by constriction. Lips mostly amalgamated, the lateral ones not especially separated from the corresponding subventral and subdorsal lips, as usual in the genus (compare Fig. 5 E, F to Fig. 5 A, B), the birradial symmetry hence not so distinct as in other species. Oral field with distinct radial striation between the typical dorso-ventral, hexagonal opening and the margin. Labial and cephalic papillae low, button-like. Amphid fovea protruding on body surface. Outer cuticle layer with distinct, relatively coarse, transverse striation. TABLE 4. Morphometric data of Aporcelaimellus salicinus Álvarez-Ortega, Subbotin & Peña-Santiago, 2013. Measurements in μm (except L, in mm), and the form: mean ± standard deviation (range). Province Almería Granada Population Tabernas Sierra Sierra Sierra de los Sierra Nevada-Alpujarras Sierra de los Filabres Sierra Nevada-Alpujarras Desert Arana Jurena Filabres Character n 10♀♀ ♀ 4♀♀ ♀ ♀ 3♀♀ 2♀♀ 1.86 ± 0.11 (1.66–1.99) 1.68 1.88 ± 0.09 (1.79–1.96) 1.86 1.84 2.00 ± 0.13 (1.91–2.14) 1.94, 2.04 33.0 ± 2.3 (30–37)? 32 (n=1) 27 27 30.8 ± 1.0 (30–32) 33, 34 3.7 ± 0.2 (3.4–4.1) 3.5 4.3 (n=1)? 3.8 3.2, 3.7 (n=2)? 59.5 ± 3.9 (55 –65) 49 59.2 ± 1.0 (58–61) 60 58 61.3 ± 3.4 (58–64) 55, 58 1.0 ± 0.0 (0.9–1.0) 1.0 1.0 ± 0.1 (0.9–1.1) 1.0 0.9 0.9, 1.0 (n=2) 0.54, 0.52 53.4 ± 1.5 (51–56) 54 52.9 ± 0.4 (52–53) 49 54 52.8 ± 0.9 (52–53) 1.0, 0.9 region diam. 15.7 ± 0.1 (16–16) 16 18.1 ± 1.2 (17–19) 18 18 18.2 ± 0.8 (17–19) 16 (n=2) Odontostyle length 19.8 ± 0.7 (18–21) 20 21.3 ± 0.5 (21–22) 22 23 22.4 ± 0.8 (22–23) 20 (n=2) Odontophore length 34.7 ± 1.2 (33–37) 34 38.1 ± 0.5 (38–39) 34 35 45.2 ± 1.3 (44–46) 36, 34 Guiding ring from ant. end 8.7 ± 0.3 (8–9) 9 9.2 ± 0.5 (9–10) 11 11 10.2 ± 0.7 (9–11) 9 (n=2) Neck length 497 ± 21 (464–533) 479 460 (n=1)? 485 525, 604 (n=2)? Pharyngeal expansion length 259 ± 19 (235–286) 253 224 (n=1)? 248 253, 324 (n=2)? Diam. at neck base 54.6 ± 3.8 (50–61) 65 54 (n=1) 58 61 63.7 ± 5.1 (60–70) 53, 57 at mid-body 56.5 ± 4.7 (51–63) 66 61 (n=1) 68 67 65.0 ± 5.4 (61–71) 59, 60 at anus 30.9 ± 1.1 (30–34) 35 32.0 ± 1.9 (29–33) 31 34 33, 34 (n=2) 35, 37 Prerectum length 50.8 ± 5.9 (42–58) 49 44 68 70 82 (n=1) 40, 38 Rectum length 46.6 ± 1.7 (43–49) 39 44.2 ± 4.2 (41–49) 43 49 53.2 ± 1.2 (52–54) 44, 46 length 31.3 ± 1.4 (30–35) 34 31.8 ± 1.2 (31–33) 31 32 32.6 ± 2.1 (30–34) 36, 35 ……continued on the next page Distribution. Province of Almería: (i) Sierra Nevada-Alpujarras, road from Canjáyar to Ugíjar, thyme and esparto (needle grass) field; (ii) Tabernas Desert, Miniholliwood, Retama sphaerocarpa ; and (iii) Sierra de los Filabres, road to Calar Alto, R. sphaerocarpa and esparto (needle grass) field. Province of Granada : (iv) Sierra Arana, Darro, esparto (needle grass) field; (v) Sierra Jurena, Sierras de la Sagra, Jurena y Guillimona Natural Park, road from Huéscar to La Puebla de Don Fadrique, holm oak forest; Sierra Nevada-Alpujarras, road to Lanjarón, R. sphaerocarpa and esparto (needle grass) field; and (vi) Sierra de los Filabres, road to Caniles, R. sphaerocarpa . Province of Jaén: (vii) Sierras de Andújar Natural Park, Andújar, near Jándula river, blackberry ( Rosa sp.); (viii) Sierra Mágina Natural Park, Sierra de la Cruz, Hoyo de la Laguna, meadow; (ix) Sierra de Cazorla, Sierras de Cazorla, Segura y Las Villas Natural Park, road to Guadalquivir river source, oak trees ( Quercus coccifera ); and (x) Sierra de Segura, Sierras de Cazorla, Segura y Las Villas Natural Park, road to Segura river source, pine forest. Province of Málaga: (xi) Guadalhorce river basin, road from Villanueva del Trabuco to Puerto de los Alazores, almond trees; (xii) Sierra de Alhama, Sierras Alhama, Tejeda y Almijara Natural Park, La Axarquía shire, Boquete de Zafarraya cave, meadow; and (xiii) Antequera Plains, road from Fuente de Piedra to Alameda, olive trees, R. sphaerocarpa , Ulex parviflorus and Daphne gnidium .

TABLE 4. (Continued)
Population	Jaén	Málaga
Sierras de Andújar N.P.	Sierra Mágina N.P.	Sierra de Cazorla	Sierra de Segura	Guadalhorce river basin	Sierra de Alhama	Llanos de Total range Antequera
Character	n 2♀♀	♀	♀	♀	5♀♀	3♀♀	♀ 36♀♀

L	1.96, 1.79 1.81	1.33	1.69	1.52 ± 0.20 (1.20–1.68) 1.88 ± 0.15 (1.71–1.96) 1.84	1.20–2.14
a	31, 32?	?	29	31.6 ± 2.6 (28–34) 34, 39 (n=2) 27	27–39
b	4.1, 3.8 4.1	?	3.4	3.8 (n=1) 3.9 ± 0.2 (3.7–4.2) 4.1	3.2–4.3
c	58, 52 56	43	67	55.6 ± 6.6 (46–60) 57, 67 (n=2) 47	43–67
c'	1.1, 1.1?	1.1	0.8	1.1 ± 0.1 (1.0–1.1) 1.0, 1.1 (n=2) 1.1	0.8–1.1
V	50, 53 51	51	57	54.5 ± 1.1 (53–56) 51.6 ± 1.8 (50–53) 49	49–57
Lip region diam.	16 (n=2) 16	16	17	17 (n=2) 16.5 ± 0.5 (16–17) 17	16–19
Odontostyle length	20 (n=2) 22	22	23	20.5 ± 1.3 (18–22) 20.8 ± 0.7 (20–21) 23	18–23
Odontophore length	37, 34 39	37	38	34.1 ± 1.7 (32–37) 40.3 ± 0.4 (40–41) 39	33–46
Guiding ring from ant. end	?, 9 8	?	9	9.2 ± 0.2 (9–9) 9 (n=1) 10	8–11
Neck length	477, 471 437	?	498	443 (n=1) 481 ± 33 (457–518) 454	437–604
Pharyngeal expansion length	250, 245 239	?	246	226 (n=1) 245 ± 23 (231–271) 224	224–324
Diam. at neck base	59, 52 54	?	58	47, 48 (n=2) 47, 52 (n=2) 61	47–70
at mid-body	64, 55?	?	58	51.0 ± 1.0 (50–52) 50, 58 (n=2) 68	50–71
at anus	32 (n=2)?	28	33	27.7 ± 1.7 (26–30) 30.3 ± 1.3 (29–31) 35	26–37
Prerectum length	58, 76 59	?	32	50.0 ± 5.1 (45–57)? 66	32–82
Rectum length	46, 43 48	47	41	36.5 ± 1.0 (36–38) 51 (n=1) 47	36–55
Tail length	34 (n=2) 33	31	25	29.0 ± 1.9 (28–32) 29, 34 (n=2) 39	26–39

FIGURE 8. Aporcelaimellus salicinus Álvarez-Ortega, Subbotin & Peña-Santiago, 2013 (LM, female). A: Entire. B, C: Anterior region in median, lateral view. D: Pharyngeal expansion. E: Lip region in lateral surface view. F: Posterior body region. G, I: Vagina. H: Pharyngo-intestinal junction. J–M: Caudal region. (Scale bars: A = 500 µm; B, F, H = 20 µm; C, G, I, J–M = 10 µm; D = 50 µm; E = 5 µm). Remarks. This species, recently described from California ( USA ), is widely distributed in Andalusian soils. The abundant material herein examined forms a rather homogenous group, although some interpopulational differences are observed in, for instance, general body size, odontophore length, etc. Iberian populations are nearly identical to American ones, although the range of measurements and ratios are notably extended and some (minor) differences are observed in the location of DN (59–63 vs DN = 63–68) and in the morphology of caudal region, which is a little shorter in Iberian specimens ( c’ = 0.8–1.1 vs c’ = 1.0–1.4) and whose inner cuticle layer shows a perceptible variability in its refraction compared to that of other layers, being similar ( Fig. 8 L) or quite dissimilar ( Fig. 8 J, K, M), maybe as a result of the fixation process.