Trachelas acuminus ( Zhu and An, 1988 )

Kim, Byung-Woo & Lee, Woncheol, 2008, Notes on four corinnid species from Korea, with the description of Trachelas joopili new species (Arachnida: Araneae: Corinnidae), Journal of Natural History 42 (27 - 28), pp. 1867-1884 : 1871-1876

publication ID	https://doi.org/ 10.1080/00222930802124032
persistent identifier	https://treatment.plazi.org/id/03A14C47-C73D-1D49-FE55-FA242F0CFA53
treatment provided by	Felipe
scientific name	Trachelas acuminus ( Zhu and An, 1988 )
status

Treatment

Trachelas acuminus ( Zhu and An, 1988)

Clubiona acumina Zhu and An, 1988, p. 72 , Figures 1–6 View Figure 1 View Figure 2 View Figure 3 View Figure 4 View Figure 5 View Figure 6 (D „ ♀)

T. acumina: Mikhailov, 1995, p. 100 (transferred from Clubiona View in CoL ); Zhu et al., 1998, p. 425, figures 1–7 (redescription of male and female).

T. coreanus Paik, 1991b, p. 200 , figures 1–11 (♀); Namkung, 2001, p. 456, Figure. 35.3a (♀). New synonymy.

Distribution

Korea (Kimhwa, Mt. Choijeungsan,), China.

Material recorded in Korea

One female, 15 October, 1962, Kimhwa, Cheolwon-gun, Gangwon-do, leg. Y.K. Kim; one female, 3 September, 1978, one female, 10 September, 1978, Mt. Choijeungsan , Taegu city, Gyeongsnagbuk-do , leg. K. S. Choi and T. K. Lee ( Paik 1991b) .

Remarks

Paik (1991b) had not referred the publication of Clubiona acumina Zhu and An, 1988 . Though the original specimens of T. coreanus cannot be examined for the missing deposition and absence in the personal collection of Paik (author), these materials are in fact Trachelas acuminus ( Zhu and An, 1988) based on the copualtory duct, the position of the spermatheca and the shape of the circular genital opening of the female situated posteriorly near the epigastric furrow.

Trachelas japonicus Bösenberg and Strand, 1906 View in CoL

( Figures 2–3 View Figure 2 View Figure 3 , 6F–O View Figure 6 )

T. japonicus Bösenberg and Strand, 1906, p. 294 View in CoL , Figure 504 (plate 16) (D „ ♀); Namkung and Yoon, 1975, p. 40, Figure 4 View Figure 4 (♀); Yaginuma, 1986, p. 183, Figure 102.5 („ ♀); Chikuni, 1989, p. 128, Figure 28 („ ♀); Paik, 1991b, p. 201, Figures 12–23 („ ♀); Chen and Zhang, 1991, p. 253, Figure 265.1–3 („ ♀); Song et al., 1997, p. 1727, Figure 33a–b (♀); Song et al., 1999, p. 429, Figure 255S-T (♀); Song et al., 2001, p. 324, Figure 209A–H („ ♀); Namkung, 2001, p. 455, Figure 35.2a–b („ ♀).

T. japonica Yaginuma, 1960, p. 114 , Figure 92.5–6 („ ♀); Yaginuma, 1971, p. 114, Figure 92.5–6 („ ♀); Chen and Zhang, 1982, p. 36, Figures 8–9 (♀); Hu, 1984, p. 305, Figure 319.3–4 (♀); Feng, 1990, p. 170, Figure 145 (♀); Chen and Gao, 1990, p. 156, Figure 199 (♀).

Diagnosis

This species can be distinguished from other congeners by male palp organs with embolus largely broad, straight or not coiled, with embolus tip divided into two parts, median apophys hook-shaped situated on the upper part of tegulum, large patella and tibial apophysis and large concaved femur on the distal part; female with a pair of hood, rounded bursa, situated on the outer part of opening, almost three times as wide as long, long and coiled copulatory duct.

Description

Measurements (mm). Male (female in parentheses): Habitus length 3.0 (4.0); cheliceral length 0.3 (0.5), cheliceral width 0.2 (0.2), cheliceral fang length 0.2 (0.3); clypeal height 0.1 (0.1); carapace length 1.5 (1.6), carapace width 1.2 (1.4), carapace height 0.7 (0.7); maxillae length 0.4 (0.4), maxillae width 0.2 (0.3); labium length 0.3 (0.3), labium width 0.3 (0.3); sternum length 0.8 (0.9), sternum width 0.7 (0.8); AER 0.4 (0.4), PER 0.5 (0.5), AME 0.08 (0.10), ALE 0.08 (0.09), PME 0.09 (0.09), PLE 0.09 (0.10). Eye formula PME5PLE.ALE5AME (PLE5AME.ALE5AME). Palp 1.5 (1.7 [0.5 (0.6), 0.2 (0.3), 0.2 (0.3), 0.6 (0.5)]. First leg 4.8 (3.9) [1.4 (1.1), 0.6 (0.6), 1.1 (0.9), 0.9 (0.7), 0.8 (0.6)], second leg 3.3 (3.6) [0.9 (1.1), 0.5 (0.5), 0.8 (0.8), 0.7 (0.7), 0.7 (0.5)], third leg 2.7 (3.0) [0.7 (0.8), 0.4 (0.5), 0.5 (0.6), 0.6 (0.7), 0.5 (0.4)], fourth leg 3.8 (4.3) [1.0 (1.2), 0.4 (0.5), 0.9 (1.0), 1.0 (1.1), 0.4 (0.5)]. Leg formula I IV II III (IV I II III). Abdomen length 1.6 (2.4), abdomen width 1.0 (1.7), abdomen height 0.9 (1.5).

Male. Medium-sized spider, shorter than female. Carapace elongate, granulated, dark-brown coloured, 1.3 times as long as wide, convex thorax, lacking lateral invagination, with indistinctly longitudinal fovea ( Figure 2A View Figure 2 ). AER and PER slightly procurved in frontal view, PER longer than AER; AME separated by their diameter, and LERC ratio 42 ( Figure 2B View Figure 2 ). Clypeal height 1.3 times as long as AME diameter and without distinct chilum ( Figure 2B View Figure 2 ). Chelicerae with numerous long setae, with three promarginal teeth on groove, middle one largest, and two retromarginal teeth of subequal size ( Figure 2C View Figure 2 ). Maxillae reddish brown, widest at anterior part, longitudinal depression on inner part ( Figure 2D View Figure 2 ). Labium square as long as wide ( Figure 2D View Figure 2 ). Sternum shield-shaped, sclerotized intercoxal angles, widest between second coxae, produced between fourth coxae ( Figure 2E View Figure 2 ). Legs ( Figure 2K View Figure 2 ) yellowish brown, dark ring patterns on tibiae and metatarsi, spineless, tarsi bearing claw tufts; leg I without cusp on ventral and leg II with cusps in a row; leg I longer than leg IV; length (patella+tibia) of first leg longer than carapace length; trochanter not notched; tibiae with four to seven trichobothria (five on first leg, six on second, seven on third, four on fourth), metatarsi with two to four trichobothria (two on first leg, three on second and fourth, four on third), tarsi with one to six trichobothria (one on first and second leg, six on third, two on fourth); tarsal organ situated close to distal end of tarsus, slightly anterior part of distal trichobothrium; tarsi with three claws. Abdomen ovoid, dark-brown coloured, with brownish yellow spots on dorsum, without dorsal, epigastric and ventral scuta ( Figure 2A View Figure 2 ).

Male palp ( Figures 2F–J View Figure 2 , 6F–I View Figure 6 ) without tarsal claw and spine: Patellar and tibiae with large apophysis; tibia slightly longer than wide, rectangular ridge prolateromesally; femur largely concave on the distal ventral part; cymbium rounded at base, long and slender, bent ventrally on distal part, and without cymbial furrow; tegulum expanded roundedly at base, enclosing long twisted loop of sperm duct from embolus to upper part of median apophysis; embolus largely broad, straight or not coiled, with embolus tip divided into two parts, median apophysis hook-shaped situated on the upper part of tegulum.

Female. Medium-sized spider, longer than male. Carapace elongate, granulated, dark-brown coloured, 1.1 times as long as wide, convex thorax, lacking lateral invagination and longitudinal fovea ( Figure 3A View Figure 3 ). AER and PER slightly procurved in frontal view, PER longer than AER; AME separated by their diameter, and LERC ratio 36 ( Figure 3B View Figure 3 ). Clypeal height slightly longer than AME diameter and with one small triangular chilum ( Figure 3B View Figure 3 ). Chelicerae with numerous long setae, with three promarginal teeth on groove, middle one largest, and two retromarginal teeth of subequal size ( Figures 3C View Figure 3 , 6J View Figure 6 ). Maxillae reddish brown, widest at anterior part, longitudinal depression on inner part ( Figure 3D View Figure 3 ). Labium square as long as wide ( Figure 3D View Figure 3 ). Sternum shield-shaped, sclerotized intercoxal angles, widest between second coxae, produced between fourth coxae ( Figure 3E View Figure 3 ). Palp ( Figure 3F View Figure 3 ) with one tarsal claw, tarsus with four spines (0-1-1 prolaterally, 0-0-2 ventrally), tibia with three trichobothria. Legs ( Figures 3G View Figure 3 , 6K–N View Figure 6 ) yellowish brown, ring dark patterns on tibiae and metatarsi, spineless, tarsi bearing claw tufts, without leg cusp on ventral; leg I longer than leg IV; length (patella+tibia) of first leg shorter than carapace length; trochanter not notched; tibiae with two to nine trichobothria (two on first leg, nine on second and fourth, eight on third), metatarsi with two to five trichobothria (four on first, three on second, two on third, five on fourth), tarsi with one to six trichobothria (five on first and fourth leg, four on second and third); tarsal organ situated close to distal end of tarsus, slightly anterior part of distal trichobothrium; tarsi with three claws. Abdomen ovoid, dark-brown coloured, with two pairs of muscular impressions and scattered brownish yellow spots on dorsum, without dorsal, epigastric and ventral scuta ( Figure 3A View Figure 3 ).

Epigynum ( Figures 3H–J View Figure 3 , 6O View Figure 6 ). Epigynal teeth absent; epigynal opening concave, long, longitudinally oval, expanded to atrial hood on the upper part; bursa situated on the outer part of opening, almost three times as wide as long; copulatory duct long and coiled, medially downwards; spermatheca situated in the anterior part of epigastric furrow, smaller than bursa diameter; fertilization ducts short, arising from the posterolateral ends of the spermathecae.

Material examined

One female (KMU), 28 May, 1979, Mt. Geumosan, Kumi-si, leg. B.K. Seo, six females ( KMU), 25 May, 1978, Mt. Hwanghaksan , leg. S. R. Shon , two males ( KMU), 27 April , 1984, leg. H.K. Kang , one male ( KMU), 16 April, 1978, Mt. Choijeongsan, Darseung-gun , Gyeongsangbuk-do, leg. K.S. Choi and T.K. Lee , one female ( NIBR), 5 July, 2000, Mt. Baebongsan , one male ( NIBR), 1 May, 2001, Mt. Suraksan , seven females ( LBHU), 18 May, 2001, Mt. Yongmasan , Seoul, leg. B.W. Kim ; one female ( LBHU), 8 June , 2003 , three males ( LBHU) , six females ( LBHU), 8 May, 2004, Haman, Gyongsannam-do , leg. T. S. Kwon .

Distribution

Korea (Mt. Geumosan, Mt. Hwanghaksan, Mt. Parbongsan, Choijeongsan, Mt. Yongmasan, Mt. Suraksan), Russia, China, Japan.

Remarks

Male leg I is longer than leg IV but female leg I is shorter than leg IV. Trachelas japonicus is redescribed with several characters (spine on female palp, trichobothrial patterns etc.) neglected in the original description and others.

T	Tavera, Department of Geology and Geophysics
KMU	Karl-Marx-Universitat Leipzeg
R	Departamento de Geologia, Universidad de Chile
NIBR	National Institute of Biological Resources

Copyright notice

No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.

Taxonomy

Kingdom	Animalia
Phylum	Arthropoda
Class	Arachnida
Order	Araneae
Family	Trachelidae
Genus	Trachelas