Emertongone, Lin & Lopardo & Uhl, 2022 (Emerton, 1882)

Lin, Shou-Wang, Lopardo, Lara & Uhl, Gabriele, 2022, Evolution of nuptial-gift-related male prosomal structures: taxonomic revision and cladistic analysis of the genus Oedothorax (Araneae: Linyphiidae: Erigoninae), Zoological Journal of the Linnean Society 195, pp. 417-584 : 525-529

EMERTONGONE MONTIFERA ( EMERTON, 1882) COMB. NOV.

( FIGS 7A , 66 , 67C , 68C; SUPPORTING INFORMATION, FIG. S5B )

Lophocarenum montiferum Emerton, 1882: 47 , pl. 13, fig. 2 (Dmf).

Gongylidium montiferum Simon, 1884: 500 .

Erigone montifera Marx, 1890: 535 .

Neriene montifera Simon, 1894: 633 . Oedothorax montiferus Crosby, 1905: 312 , 335. Diplocephalus montiferus Banks, 1916: 73 .

Oedothorax montiferus Bishop & Crosby, 1935: 266 , pl. 22, figs 74–78 (mf).

Oedothorax montiferus Kaston, 1948: 173 , figs 486– 492 (mf).

Oedothorax montifer Paquin & Dupérré, 2003: 115 , figs 1186–1189 (mf).

Type material: Not designated. Type locality: Brookline and Salem, Mass. (Bishop & Crosby 1935). The clear illustrations of the male prosomal and palpal structures and epigyne in the original description allow the unambiguous identification of this species.

Examined material: USA: Pennsylvania, Lower Friederick Township (40°16’ N, 75°30’ W), 4♂ 3♀ iii.1954, Wilton Ivie coll. & det; Massachusetts, Middlwsex, Peperell, 1♀ 24.x.1970, det. Platnick; Massachusetts, Brookline (42°19’ N, 71°6’ W), 1♂ 1♀ 10.vi.1873, coll. J. H. Emerton; Ohio, Wayne County, Neil McCoy’s Woods, under rotting wood, 2♀ 25.iv.1959, J. A. Beatty.

Description:

Male (Pennsylvania): Total length: 1.70. Prosoma: 0.89 long, 0.67 wide, post-PME region largely elevated, with post-PME groove ( Fig. 7A ). Eyes: AME-AME: 0.02, AME width: 0.04, AME-ALE: 0.12, ALE width: 0.06, ALE-PLE: 0.01, PLE width: 0.05, PLE-PME: 0.02, PME width: 0.04, PME-PME: 0.31. Clypeus: hirsute. Sternum: 0.48 long, 0.45 wide. Chelicerae: stridulatory striae rows widely and evenly spaced ( Fig. 67C ). Legs: tibia chaetotaxy 2-2-1-1, dorsal proximal macroseta on tibia I, II, III and IV 0.35, 0.33, 0.33 and 0.49 times diameter of tibia, respectively; Tm I: 0.61. Metatarsi I–III with trichobothrium, IV without trichobothrium. Pedipalp: PC base visible from dorsal view, distal seta distally situated, distal clasp small; PT without papillae; TS absent; MSA round; DSA complex ( Fig. 66A ); EM arised from distal part of DSA; R and E fused; E prolaterally spiral, tip retrolateral to DSA; TP, ARP, LER, and VRP absent ( Fig. 66C, D ). Opisthosoma: evenly coloured, dark grey ( Fig. 68C ).

Female (Pennsylvania): Total length: 1.70. Prosoma: 0.69 long, 0.65 wide. Eyes: AME-AME: 0.02, AME width: 0.04, AME-ALE: 0.04, ALE width: 0.06, ALE- PLE: 0.01, PLE width: 0.06, PLE-PME: 0.02, PME width: 0.05, PME-PME: 0.1. Clypeus: hirsute. Sternum: 47 long; 42 wide. Legs: tibia chaetotaxy 2-2-1-1, dorsal proximal macroseta on tibia I, II, III and IV 0.79, 0.77,

0.71 and 0.82 times diameter of tibia, respectively; Tm I: 0.56. Epigyne: dorsal plate extended anteriorly, bordering ventral plate by two lateral slits and an anterior slit, CO at lateral ends of anterior slit ( Fig. 66E–G ). Opisthosoma: evenly coloured, dark grey.

Variation: The measurements are based on examined material.

Males (N = 5, means in parentheses): Total length 1.70 – 1.89 (1.79). Prosoma: 0.86 – 0.95 (0.89) long, 0.66 – 0.75 (0.68) wide. Legs: dorsal proximal macroseta on tibia I, II, III and IV 0.29 – 0.35 (0.32), 0.25 – 0.33 (0.30, N = 3), 0.19–0.33 (0.27, N = 4) and 0.30 – 0.49 (0.42) times diameter of tibia, respectively; Tm I: 0.53 – 0.61 (0.56).

Females (N = 7, means in parentheses): Total length 1.70 – 2.37 (2.09). Prosoma: 0.69 – 0.91 (0.81) long, 0.62 – 0.77 (0.69) wide. Legs: dorsal proximal macroseta on tibia I, II, III and IV 0.46 – 0.80 (0.69, N = 3), 0.52 – 0.78 (0.66, N = 4), 0.44 – 0.71 (0.58, N = 4) and 0.57 – 0.82 (0.72, N = 4) times diameter of tibia, respectively; Tm I: 0.53 – 0.62 (0.57).

Distribution: USA.

Habitat: Maple swamps ( Emerton, 1882).

Figures

Figure 5. Oedothorax agrestis (Blackwall, 1853). A–D, male left palp. A, retrolateral view. B, prolateral view. C, dorsal view. D, ventral view. E–H, epigyne. E, ventral view. F, dorsal view. G, anterior view. H, external morphology. Scale bar 0.1 mm.

Figure 7. Male prosomal morphology, lateral.A, Emertongone montifera (Emerton, 1882) (Paquin & Dupérré, 2003, fig. 1187). B, Shaanxinus mingchihensis Lin, 2019 (traced from photograph). C, ‘Oedothorax’ paracymbialis Tanasevitch, 2015 (traced from photograph). D, ‘Oe.’ kodaikanal Tanasevitch, 2015 (traced from photograph). E, ‘Oe.’ cunur Tanasevitch, 2015 (traced from photograph). F, ‘Oe.’ stylus Tanasevitch, 2015 (traced from photograph). G, Atypena cirrifrons (Heimer, 1984) (traced from photograph). H, A. formosana (Oi, 1977) (Oi, 1977, fig. 2). I, ‘Oe.’ nazareti Scharff, 1989 (Scharff, 1989: fig. 7). J, Gongylidium rufipes (Linnaeus, 1758) (traced from photograph). K, Ummeliata insecticeps (Bösenberg & Strand, 1906) (Tu & Li 2004: fig. 8A). L, U. esyunini (Zhang, Zhang & Yu, 2003) (Zhang et al., 2003, fig. 2A). M, Hylyphantes graminicola (Sundevall, 1830) (traced from photograph). N, Tmeticus tolli Kulczyński, 1908 (traced from photograph). O, Oedothorax gibbosus (Blackwall, 1841) [Roberts, 1987: fig. 21 (e)]. P, Oe. trilobatus (Banks, 1896) (Bishop & Crosby, 1935: fig. 79). Q, Oe. gibbifer (Kulczyński, 1882) (Heimer & Nentwig, 1991: fig.604.5).R, Oe.apicatus (Blackwall, 1850) [Roberts, 1987: fig.23 (d)].S, Oe. retusus (Westring, 1851) [Roberts, 1987: fig. 23 (c)]. T, Oe. paludigena Simon, 1926 [Millidge, 1975: fig. (5)]. U, Oe. meridionalis Tanasevitch, 1987 (Tanasevitch, 1987: fig. 107).V, Oe. agrestis (Blackwall, 1853) (Roberts, 1987: fig. 23B).W, Oe. fuscus (Blackwall, 1834) (Roberts, 1987: fig. 23A). X, Oe. tingitanus (Simon, 1884) (Denis, 1968: fig. 11).

Figure 66. Emertongone montifera (Emerton, 1882). A–D, male left palp. A, retrolateral view. B, prolateral view. C, ventral view. D, expanded, retrolateral view. E–G, epigyne. E, ventral view. F, dorsal view. G, external morphology. Scale bar 0.1 mm.

Figure 67. Male chelicerae, stridulatory striae on lateral side. A, Jilinus hulongensis (Zhu & Wen, 1980). B, Cornitibia simplicithorax (Tanasevitch, 1998). C, Emertongone montifera (Emerton, 1882). D, ‘Oedothorax’ paracymbialis Tanasevitch, 2015. E, ‘Oe.’ kodaikanal Tanasevitch, 2015. F, ‘Oe.’ cunur Tanasevitch, 2015. G, ‘Oe.’ stylus Tanasevitch, 2015. H, Atypena cirrifrons (Heimer, 1984). I, A. formosana (Oi, 1977). J, ‘Oe.’ nazareti Scharff, 1989. K, Gongylidium rufipes (Linnaeus, 1758). L, Ummeliata insecticeps (Bösenberg & Strand, 1906). M, U. esyunini (Zhang, Zhang & Yu, 2003). N, Hylyphantes graminicola (Sundevall, 1830). O, Tmeticus tolli Kulczyński, 1908. Scale bars 0.05 mm.

Figure 68. Male opisthosoma, dorsal view. A, Jilinus hulongensis (Zhu & Wen, 1980). B, Cornitibia simplicithorax (Tanasevitch, 1998). C, Emertongone montifera (Emerton, 1882). D, ‘Oedothorax’ paracymbialis Tanasevitch, 2015. E, ‘Oe.’ kodaikanal Tanasevitch, 2015. F, ‘Oe.’ cunur Tanasevitch, 2015. G, ‘Oe.’ stylus Tanasevitch, 2015. H, Atypena cirrifrons (Heimer, 1984). I, A. formosana (Oi, 1977). J, ‘Oe.’ nazareti Scharff, 1989. K, Gongylidium rufipes (Linnaeus, 1758). L, Ummeliata insecticeps (Bösenberg & Strand, 1906). M, U. esyunini (Zhang, Zhang & Yu, 2003). N, Hylyphantes graminicola (Sundevall, 1830). O, Tmeticus tolli Kulczyński, 1908. Scale bars 0.1 mm.