Ambanus lunatus ( Paik, 1976 )

Kim, Byung-Woo & Lee, Woncheol, 2006, Two poorly known species of the spider genus Ambanus (Arachnida: Araneae: Amaurobiidae) in Korea, Journal of Natural History 40 (23 - 24), pp. 1425-1442 : 1426-1441

Ambanus lunatus ( Paik, 1976)

( Figures 1–3 , 7 , 8A, B , 9 C–F)

Coelotes lunatus Paik 1976, p 84 , Figures 4 , 19–21 (Dǫ); Paik 1978, p 346, Figure 155 (ǫ).

Ambanus lunatus: Ovtchinnikov 1999, p 64 (transferred from Coelotes ); Namkung 2001, p 393, Figure 28.7a (ǫ); Namkung 2003, p 395, Figure 28.7a (ǫ).

Diagnosis

This species is similar to A. coreana , A. napoloυi Ovtchinnikov, 1999, A. paiki Ovtchinnikov, 1999 , and A. quadratiυulυus ( Paik, 1974) in having female epigynum with atrium very broadly oval, situated posteriorly near epigastric furrow; copulatory pore deep, linear on inner lateral part; copulatory ducts broadly curved with transparent membranes in both posterior margins; male palpal organ with cymbial furrow less than one-third cymbial length; large embolus with curved distal part; and conductor saucer-like, with a rounded distal end situated on centre of papal organ. Ambanus lunatus female can be distinguished by the presence of a semicircular swollen atrial hood; distinctive atrial septum triangularly expanded, originating in posterior plate; chelicerae with three promarginal teeth; and spermathecal stalk overlapped in the middle; the male by an embolus with two distal parts with cup-shaped processes and another divided into two protrusions facing the retrolateral side; cymbial furrow short, about one-fifth the cymbial length.

Description

Measurements (mm). Female/male: habitus length 12.3/12.6; carapace length 4.8/5.7, carapace width 3.3/3.8, carapace height 3.1/4.1; cheliceral length 2.7/2.7, cheliceral width 1.3/1.2, cheliceral fang length 1.4/1.4; sternum length 2.6/2.4, sternum width 2.0/2.0; endite length 1.7/1.7, endite width 1.0/1.0; labium length 0.9/1.0, labium width 0.8/0.9; clypeal height 0.2/0.2; AER 1.0/0.7, PER 1.3/0.9, AME 0.1/0.1, ALE 0.2/0.2, PME 0.2/ 0.2, PLE 0.2/0.2. Eye formula ALE5PLE5PME.AME/ALE5PLE5PME.AME. Palp 5.2/5.4 (1.7/1.9, 0.8/0.6, 1.0/0.4, 1.7/2.5). First leg 12.0/15.2 (3.4/4.1, 1.6/1.9, 2.7/3.4, 2.7/3.6, 1.6/2.2), second leg 10.9/13.7 (3.1/3.8, 1.6/1.8, 2.2/2.8, 2.5/3.3, 1.5/2.0), third leg 10.4/12.9 (2.9/3.6, 1.5/1.7, 1.8/2.2, 2.7/3.5, 1.5/1.9), fourth leg 14.0/17.0 (3.8/4.5, 1.7/ 1.8, 2.9/3.6, 3.9/4.9, 1.7/2.2). Leg formula IV I II III/IV I II III. Abdomen length 6.9/6.0, abdomen width 4.5/3.8, abdomen height 4.7/4.0; ALS 0.5/05, PLS 0.9/0.9 (0.4/0.4+0.5/ 0.5).

Female. Medium-sized spider slightly shorter than male, found under stones and fallen leaves on the ground of the forests. Carapace elongate, 1.2 times longer than width, moderately narrowed in eye area, and distinctly longitudinal fovea on middle ( Figure 1A ). AER straight and PER slightly procurved in frontal view; AME smaller than other eyes, separated by as much as their diameter ( Figure 1B ); and eye ratio 24. Clypeal height slightly longer than AME diameter and without chilum. Chelicerae with numerous long setae; lateral condyle yellowish brown; three promarginal teeth, middle one largest; and two retromarginal teeth subequal in size ( Figure 1C ). Endites reddish brown, widest at midpart; and labium rectangular, longer than wide ( Figure 1D ). Sternum shield-shaped, widest at second coxae, and slightly projected between fourth coxae ( Figure 1E ). Palp ( Figure 1 G– I) composed of one claw with seven side teeth; tibia with nine trichobothria in three rows (5d-1d-3r), tarsus five in one (5r) and femur with three spines, tibia with five (four, 2-2 on dorsal; one, 0-1 on prolateral), tarsus 14 (five, 2-2-1 on prolateral; five, 0-5 on retrolateral; four, 0-4 on ventral). Legs ( Figures 1F , 7 ) yellowish brown without ring patterns; length of first leg (patella+tibia) always shorter than carapace length; trochanters not notched; tibia with 11–17 trichobothria in four rows (4p-5d-4d-4r on first leg, 4p-5d-4d-4r on second, 3p-5d-4d-4r on third, 1p-6d-3d-1r on fourth), metatarsi six to seven in one row (seven on first leg and second, six on third and fourth), tarsi six to seven in one row (seven on first leg, third and fourth, six in second); tarsal organ situated close to distal end of tarsus, slightly anterior of distal trichobothrium; tarsi with three claws, upper claws with 9–12 side teeth (12 on first leg, 11 on second, nine on third and fourth), lower with one to two (one on first leg, two on second, third and fourth). Leg spination ( Table I): leg I femur with four spines, tibia seven (one, 0-0-1 on prolateral; six, 2-2-2a on ventral), metatarsus eight (two, 1-1 on prolateral; six, 2-2-2 on ventral), tarsus without spine; leg II femur with four spines, tibia six (one, 0-0-1 on prolateral; five, 1-2-2a on ventral), metatarsus nine (three, 0-1-2 on prolateral; six, 2-2-2 on ventral), tarsus without spine; leg III femur five spines, tibia 10 (four, 1-0-1 on prolateral; retrolateral, six, 2-2-2a on ventral), metatarsus 16 (10, 1-2-2 on prolateral; retrolateral, six, 2-2-2 on ventral), tarsus five (one, 0-1 on retrolateral; four, 0-1- 1 on prolateral and ventral); leg IV femur four spines, tibia 12 (two, 1-0-1 on dorsal; four, 1-1 on prolateral and retrolateral; six, 2-2-2a on ventral), metatarsus 16 (10, 1-2-2 on prolateral and retrolateral; six, 2-2-2 on ventral), tarsus five (four, 0-1-1 on prolateral and retrolateral; one, 0-1 on ventral). Abdomen ovoid with scattered brownish yellow spots and chevrons on dorsal side ( Figure 1A ). Cribellum absent. Spinnerets brown; ALS cylindrical with horizontal apical part; and PLS almost twice as long as other spinnerets and two segments, second segment slightly longer than proximal one.

Female epigynum and genitalia ( Figures 1J , 2A, B , 9C, D ): epigynal teeth absent; atrial septum distinctive, triangularly expanded, originating in posterior plate; atrial slit or true copulatory pore deep, linear on inner part; atrial hood semicircular and swollen horizontally; copulatory ducts broadly curved with transparent membranes; spermathecal heads small cylindrical processes, situated at anterior of spermathecae; spermathecae short, overlapped, with indistinct stalks and bases; fertilization ducts very small, arising from the posterior spermathecae.

Male. Medium-sized spiders slightly longer than female. Carapace elongate, 1.6 times as long as width, moderately narrowed in eye area, and distinctly longitudinal fovea on middle ( Figure 3A ). AER and PER almost straight in frontal view; AME smaller than other eyes, separated by slightly less than their diameter, and eye ratio 26 ( Figure 3B ). Clypeal height slightly longer than AME diameter and without chilum. Endites reddish brown, widest at mid-part; and labium rectangular, slightly longer than wide ( Figure 3C ). Sternum shieldshaped, widest at second coxae, and not produced between fourth coxae ( Figure 3D ). Chelicerae with numerous long setae, lateral condyle yellowish brown, with three promarginal teeth, middle one largest, and two retromarginal teeth subequal in size ( Figure 3E ). Legs ( Figures 3F , 7 ) yellowish brown; length of first leg (patella+tibia) always shorter than carapace length; trochanters not notched; tibia with 16–24 trichobothria in four rows (5p-7d-4d-6r on first leg, 6p-6d-6d-6r on second, 4p-6d-5d-7r on third, 2p-6d- 4d-4r on fourth), metatarsi six to eight in one row (eight on first, third and fourth leg; six on second), tarsi 8–10 in one row (10 on first leg, nine on second and fourth, eight on third); tarsal organ situated close to distal end of tarsus, slightly anterior of distal trichobothrium; tarsi with three claws, upper claws with 9–13 side teeth (13 on first leg, 12 on second, 10 on third, nine on fourth), lower with zero to one (zero on first leg, one on second, third and fourth). Leg spination ( Table I): leg I femur with four spines, tibia seven (one, 0-0-1 on prolateral; six, 2-2-2a on ventral), metatarsus eight (two, 0-1-1 on prolateral; six, 2-2-2 on ventral), tarsus without spine; leg II femur with five spines, tibia six (one, 0-1-1 on prolateral; five, 1-1-2a on ventral), metatarsus nine (three, 0-1-2 on prolateral; six, 2-2-2 on ventral), tarsus without spine; leg III femur with six spines, tibia 10 (four, 0-1-1 on prolateral and retrolateral; six, 2-2-2a on ventral), metatarsus 17 (one, 1-0-0 on dorsal; 10, 1-2-2 on prolateral and retrolateral; six, 2-2-2 on ventral), tarsus four (three, 1-1-1 on prolateral; two, 0-1-1 on retrolateral; one, 0-1 on ventral); leg IV femur with four spines, tibia 12 (two, 1-0-1 on dorsal; four, 1-1 on prolateral and retrolateral; six, 2-2-2a on ventral), metatarsus 17 (one, 1-0-0 on dorsal; 10, 1-2-2 on prolateral and retrolateral; six, 2-2-2 on ventral), tarsus six (three, 1-1-1 on prolateral; two, 0-1-1 on retrolateral; one, 0-1 on ventral). Abdomen ovoid, with scattered brownish yellow spots and chevrons on dorsal side ( Figure 3A ). Cribellum absent. Spinnerets brown, ALS cylindrical, with horizontal apical part and PLS almost twice as long as other spinnerets and with two segments, second segment slightly longer than proximal one.

Male palp ( Figures 3 G–J, 8A, B): patellar apophysis absent; RTA modified with ITA; cymbial furrow short, about one-fifth cymbial length; tegular sclerite weakly sclerotized and longitudinally situated on tegulum; conductor broadly saucer-like with many minute denticles, rounded distal end situated on centre of papal organ; conductor dorsal apophysis situated on upper embolus; embolus broad and short, wound counterclockwise, two distal parts with cup-shaped processes and another divided into two protrusions facing the retrolateral side.

Specimens examined

Two females, 21 July 1984, two females, 24 July 1984, two females, 22 September 1984, three females, 3 October 1984, five females, five males, 3 November 1984, two females, 11 November 1984, one female, 14 April 1985, two females, 21 April 1985, three females, 3 May 1985, one female, four males, 18 May 1985, Mt. Yebong, Gyonggi-do, K. S. Lee; one male, 6 September 1986, same locality, J. H. Kim; one female, 19 January 2006, Simbog cave, Chungcheongbuk-do, B. W. Kim.

Distribution

Korea (Mt. Yebong, Mt. Songni).

Ambanus coreana ( Paik, 1992) nov. comb.

( Figures 4–6 , 7 , 8 C–F, 9A, B)

Coelotes sp. (A) Namkung and Yoon 1975, p 39, Figure 3 (ǫ).

Alloclubionoides coreana Paik 1992, p 9 , Figures 1–8 (D „, in Clubionidae ); Namkung 2003, p 448, Figure 34.31a, b („). Misidentified male.

Alloclubionoides coreanus: Platinick 1997, p 702 (in Clubionidae ).

Coelotes paikaeunensis Kim and Jung 1993, p 2 , Figures 1 , 6 , 7 (Dǫ); Namkung 2001, p 390, Figure 28.4a, b (ǫ). Misidentified female.

Ambanus paikaeunensis: Wang 2002, p 28 (transferred from Coelotes ); Namkung 2003, p 394, Figure 28.6a, b (ǫ). Misidentified female.

Ambanus lunatus: Namkung 2001, p 393 , Figure 28.7b („); Namkung 2003, p 395, Figure 28.7b („); Kim and Cho 2002, p 185, Figures 361–366 (ǫ „). Misidentified.

Diagnosis

This species is similar to A. lunatus , A. napoloυi Ovtchinnikov, 1999, A. paiki Ovtchinnikov, 1999 , and A. quadratiυulυus. The female of A. coreana can be distinguished by the presence of an oblique (/ \) shaped atrial hood; atrial septum small and broadly obscure; chelicerae with two promarginal teeth; spermathecal stalk overlapped in lower; and the male by an embolus with distal part with cup-shaped process attached slender embolus tip facing down; cymbial furrow short at about one-quarter the cymbial length.

Description

Measurements (mm). Female/male: Habitus length 12.7/10.3; carapace length 6.7/5.5, carapace width 4.0/3.4, carapace height 3.7/3.6; cheliceral length 3.0/2.5, cheliceral width 1.8/1.3, cheliceral fang length 1.7/1.3; sternum length 3.0/2.5, sternum width 2.4/1.9; endite length 2.1/1.6, endite width 1.1/0.9; labium length 0.9/0.9, labium width 0.8/0.8; clypeal height 0.2/0.2; AER 0.8/0.9, PER 1.1/1.2, AME 0.1/0.1, ALE 0.2/0.2, PME 0.2/0.2, PLE 0.2/0.2. Eye formula ALE5PLE5PME.AME/ALE5PLE5PME.AME. Palp 6.0/5.4 (2.0/1.9, 0.9/0.6, 1.2/0.4, 1.9/2.5). First leg 14.2/14.0 (4.0/3.8, 2.0/1.8, 3.1/3.1, 3.2/3.3, 1.9/ 2.0), second leg 12.2/12.6 (3.3/3.5, 1.8/1.6, 2.4/2.5, 3.0/3.1, 1.7/1.9), third leg 11.8/12.0 (3.2/3.3, 1.7/1.6, 2.1/2.1, 3.2/3.3, 1.6/1.7), fourth leg 16.1/16.0 (4.1/4.2, 2.0/1.7, 3.4/3.2, 4.5/4.6, 2.1/2.3). Leg formula IV I II III/IV I II III. Abdomen length 8.1/5.8, abdomen width 5.3/3.6, abdomen height 5.0/3.4; ALS 0.5/0.5, PLS 1.1/1.0 (0.5/0.5+0.6/0.5).

Female. Medium-sized spiders distinctly longer than male, found under stones and fallen leaves on the ground of the forests. Carapace elongate, 1.7 times as long as width, moderately narrowed in eye area, and distinctly longitudinal fovea on middle ( Figure 4A ). AER and PER slightly procurved in frontal view; AME smaller than other eyes, separated by as much as their diameter; and eye ratio 28 ( Figure 4B ). Clypeal height twice as long as AME diameter and without chilum. Chelicerae with numerous long setae; lateral condyle yellowish brown; two promarginal teeth, outer larger than inner; and two retromarginal teeth subequal in size ( Figure 4C ). Endites reddish brown, widest at mid-part; and labium rectangular, longer than wide ( Figure 4D ). Sternum shield-shaped, widest at second coxae, and slightly projected between fourth coxae ( Figure 4E ). Palp ( Figure 4 G–I) composed of one claw with seven side teeth; tibia with nine trichobothria in three rows (5d-1d-3r), tarsus five in one (5r) and femur with four spines, tibia six (three, 1-2 on dorsal and prolateral), tarsus 17 (one, 1-0 on dorsal; six, 3-2-1 on prolateral; five, 2-2-1 on retrolateral; five, 1-0-4 on ventral). Legs ( Figures 4F , 7 ) yellowish brown without ring patterns; length of first leg (patella+tibia) always shorter than carapace length; trochanters not notched; tibia with 22– 25 trichobothria in four (five on second leg) rows (6p-7d-5d-7r on first leg, 6p-6d-6d-2r-4r on second, 5p-7d-5d-5r on third, 6p-6d-6d-5r on fourth), metatarsi seven to eight in one row (seven on first, third and fourth leg, eight on second), tarsi eight to nine in one row (nine on first leg, eight on second, third and fourth); tarsal organ situated close to distal end of tarsus, slightly anterior of distal trichobothrium; tarsi with three claws, upper claws with 9–12 side teeth (12 on first leg, 11 on second, nine on third and fourth), lower with two to three (two on first, second and third leg, three on fourth). Leg spination ( Table I): leg I femur with four spines, tibia seven (one, 0-0-1 on prolateral; six, 2-2-2a on ventral), metatarsus eight (two, 1-0-1 on prolateral; six, 2-2-2 on ventral), tarsus without spine; leg II femur with four spines, tibia seven (two, 0-1-1 on prolateral, five, 2-1-2a on ventral), metatarsus 11 (three, 1-1-1 on prolateral; two, 0-1-1 on retrolateral; six, 2-1-3 on ventral), tarsus one (1-0-0) on ventral; leg III femur eight spines, tibia 10 (four, 1-1 on prolateral and retrolateral; six, 2-2-2a on ventral), metatarsus 16 (10, 1-2-2 on prolateral and retrolateral; six, 2-2-2 on ventral), tarsus five (two, 0-2 on prolateral; one, 0-1 on retrolateral; two, 0-1-1 on ventral); leg IV femur four spines, tibia 10 (four, 1-1 on prolateral and retrolateral; six, 2-2-2a on ventral), metatarsus 15 (five, 1-2-2 on prolateral; four, 1-1-2 on retrolateral; six, 2-2-2 on ventral), tarsus six (0-1-1 on prolateral, retrolateral and ventral). Abdomen ovoid with scattered brownish yellow spots and chevrons on dorsal side ( Figure 4A ). Cribellum absent. Spinnerets brown, ALS cylindrical, with horizontal apical part and PLS almost twice as long as other spinnerets and with two segments, second segment slightly longer than proximal one.

Female epigynum and genitalia ( Figures 4J , 5A, B , 9A, B ): epigynum teeth absent; atrial septum small, broadly obscure, originating in posterior plate; atrial slit or true copulatory pore deep, linear on inner retrolateral part; atrial hood oblique (/ \) shaped; copulatory ducts broadly curved with transparent membranes; spermathecal heads small cylindrical processes, with some slender tentacles on distal part, situated at anterior of spermathecae; spermathecae short, overlapped, with indistinct stalks and bases; fertilization ducts very small, arising from the posterior margin of spermathecae.

Male. Medium-sized spider distinctly shorter than female. Carapace elongate, 1.6 times as long as width, moderately narrowed in eye area, and distinctly longitudinal fovea on middle ( Figure 6A ). AER straight and PER slightly procurved in frontal view; AME smaller than other eyes, separated by slightly less than their diameter and eye ratio 35 ( Figure 6B ). Clypeal height slightly longer than AME diameter and without chilum. Endites reddish brown, widest at mid-part; and labium rectangular, slightly longer than wide ( Figure 6C ). Chelicerae with lateral condyle yellowish brown with three promarginal teeth, middle one largest, and two retromarginal teeth subequal in size ( Figure 6D ). Sternum shield-shaped, widest at second coxae, and not projected between fourth coxae ( Figure 6E ). Legs ( Figures 6F , 7 ) yellowish brown; length of first leg (patella+tibia) always shorter than carapace length; trochanters not notched; tibia with 22–25 trichobothria in four rows (7p- 6d-6d-5r on first leg, 7p-6d-5d-6r on second, 6p-6d-4d-6r on third, 6p-7d-3d-6r on fourth), metatarsi 6–13 in one row (13 on first leg, eight on second, six on third, seven on fourth), tarsi eight to nine in one row (nine on first leg, eight on second and third, nine on fourth); tarsal organ situated close to distal end of tarsus, slightly anterior of distal trichobothrium; tarsi with three claws, upper claws with 10–13 side teeth (13 on first leg, 12 on second, 11 on third, 10 on fourth), lower with zero to three (zero on first leg, three on second and fourth, one on third). Leg spination (Table II): leg I femur with four spines, tibia seven (one, 0-0-1 on prolateral; six, 2-2-2a on ventral), metatarsus seven (two, 0-1-1 on prolateral; six, 2-1-2 on ventral), tarsus without spine; leg II femur with four spines, tibia 10 (two, 1-1 on prolateral; five, 1-1-2a on ventral), metatarsus nine (three, 1-2 on prolateral; six, 2-2-2 on ventral), tarsus without spine; leg III femur six spines, tibia 10 (four, 1-1 on prolateral and retrolateral; six, 2-2-2a on ventral), metatarsus 16 (10, 1-2-2 on prolateral and retrolateral; six, 2-2-2 on ventral), tarsus four (two, 0-1-1 on prolateral; two, 0-1-0 on retrolateral and ventral); leg IV femur four spines, tibia 10 (four, 0-1-1 on prolateral and retrolateral; six, 2-2-2a on ventral), metatarsus 17 (10, 1-2-2 on prolateral and retrolateral; seven, 3-2-2 on ventral), tarsus five (four, 0-1-1 on prolateral and retrolateral; one, 0-1 on ventral). Abdomen ovoid with scattered brownish yellow spots and chevrons on dorsal side ( Figure 6A ). Cribellum absent. Spinnerets brown; ALS cylindrical with horizontal apical part; and PLS almost twice as long as other spinnerets and with two segments, second segment as long as proximal one.

Male palp ( Figures 6 G–J, 8C, D): patellar apophysis absent; RTA modified with ITA; cymbial furrow short, about one-quarter of cymbial length; tegular sclerite weakly sclerotized and longitudinally situated on tegulum; conductor broadly saucer-like with many minute denticles, rounded distal end positioned on centre of papal organ; conductor dorsal apophysis situated on distal embolus; embolus broad and short, wound counterclockwise, distal part with cup-shaped process attached slender embolus tip facing down.

Specimens examined

One female, 9 October 1973, Mt. Gamak, near the demilitarized zone, Gyeonggi-do, J. Namkung; one female, 4 June 1993, three females, two males, 9 December 1993, Mt. Paikwun , Gyeonggi-do, C. H. Jung; one female, five males, 23 October 2001, two females, five juveniles, 11 August 2004, Korean national arboretum of Gwangrung ( KNAG), Gyeonggi-do, T. S. Kwon .

Distribution

Korea (KNAG, Mt. Paikwun, Mt. Gamak).

Figures

Figure 1. Ambanus lunatus (Paik, 1976) from Korea, female. (A) Habitus, dorsal view; (B) eye area and clypeus, front view; (C) chelicerae with long setae (arrow), left part, posterior view; (D) endite and labium, ventral view; (E) sternum, ventral view; (F) fourth leg, left part, prolateral view; (G–I) palp, left part, (H) tibia, dorsal view, (I) tarsus, dorsal view; (J) epigynum with distinct atrial septum (arrow), ventral view.

Figure 2. Ambanus lunatus (Paik, 1976) from Korea, female. (A) Epigynum, ventral view; (B) genitalia, dorsal view. AH, atrial hood; AS, atrial septum; CD, copulatory duct; EF, epigastric furrow; FD, fertilization duct; GO, genital opening; SB, spermathecal base; SH, spermathecal head; SS, spermathecal stalk.

Figure 3. Ambanus lunatus (Paik, 1976) from Korea, male. (A) Habitus, dorsal view; (B) eye area and clypeus, front view; (C) endite and labium, ventral view; (D) sternum, ventral view; (E) fourth leg, left part, prolateral view; (F) chelicerae, left part, posterior view; (G–J) palp, left part, (G) prolateral, (H) ventral, (I) retrolateral, and (J) dorsal views. CDA, conductor dorsal apophysis; CF, cymbial furrow; CO, conductor; EM, embolus; RTA, retrolateral tibial apophysis.

Figure 4. Ambanus coreana (Paik, 1992) from Korea, female. (A) Habitus, dorsal view; (B) eye area and clypeus, front view; (C) chelicerae with long setae (arrow), left part, posterior view; (D) endite and labium, ventral view; (E) sternum, ventral view; (F) fourth leg, left part, prolateral view; (G–I) palp, left part, (H) tibia, dorsal view, (I) tarsus, dorsal view; (J) epigynum, ventral view.

Figure 5. Ambanus coreana (Paik, 1992) from Korea, female. (A) Epigynum, ventral view; (B) genitalia, dorsal view. AH, atrial hood; AS, atrial septum; CD, copulatory duct; EF, epigastric furrow; FD, fertilization duct; GO, genital opening; SB, spermathecal base; SH, spermathecal head; SS, spermathecal stalk.

Figure 6. Ambanus coreana (Paik, 1992) from Korea, male. (A) Habitus, dorsal view; (B) eye area and clypeus, front view; (C) endite and labium, ventral view; (D) chelicerae, left part, posterior view; (E) sternum, ventral view; (F) fourth leg, left part, prolateral view; (G–J) palp, left part, (G) prolateral, (H) ventral, (I) retrolateral, and (J) dorsal views. CDA, conductor dorsal apophysis; CF, cymbial furrow; CO, conductor; EM, embolus; RTA, retrolateral tibial apophysis.

Figure 7. Diagram of trichobothrium patterns on the left legs of Ambanus spp. in Korea. (A) Female, tibia, dorsal view; (B) female, metatarsi, retrolateral view; (C) female, tarsi, retrolateral view; (D) male, tibia, dorsal view; (E) male, metatarsi, retrolateral view; (F) male, tarsi, retrolateral view. a, Ambanus lunatus; b, Ambanus coreana; 1, first leg; 2, second leg; 3, third leg; 4, fourth leg.

Figure 8. SEM photographs of Ambanus spp. in Korea. (A) Ambanus lunatus, male palp, left part, ventral view; (B) Ambanus lunatus, male palp, left part, distal embolus tip (arrow) and conductor; (C) Ambanus coreana, male palp, left part, ventral view; (D) Ambanus coreana, male palp, left part, embolus distal tip (arrow); (E) Ambanus coreana, female fourth tarsus, distal trichobothrium and tarsal organ (arrow); (F) Ambanus coreana, female fourth tarsus, left part, tarsal organ.

Figure 9. SEM photographs of female Ambanus spp. in Korea. (A) Ambanus lunatus, epigynum with distinct atrial septum (arrow), ventral view; (B) Ambanus lunatus, epigynum, genital opening, ventral view; (C) Ambanus coreana, epigynum, ventral view; (D) Ambanus coreana, epigynum, genital opening, ventral view; (E) Ambanus lunatus, fourth leg, tarsal claws, left part, prolateral view; (F) Ambanus lunatus, fourth leg, distal metatarsus and tarsus, left part, prolateral view.