Research Article |
Corresponding author: Shuqiang Li ( lisq@ioz.ac.cn ) Academic editor: Cor Vink
© 2016 Yanfeng Tong, Joseph K.H. Koh, Xiujiao Tong, Shuqiang Li.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Tong Y, Koh JKH, Tong X, Li S (2016) Five new species of the genus Ischnothyreus Simon, 1893 from Singapore. ZooKeys 618: 39-66. https://doi.org/10.3897/zookeys.618.9451
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Five new species of the genus Ischnothyreus are reported from Singapore: I. an Tong & Li, sp. n., I. brunneus Tong & Li, sp. n., I. dactylinus Tong & Li, sp. n., I. poculum Tong & Li, sp. n. and I. tectorius Tong & Li, sp. n. Morphological descriptions and illustrations are given for all new species.
Diagnosis, goblin spider, morphology, taxonomy, type
With a population of 5.5 million people packed in a total land area measuring only 719 km2, the Republic of Singapore is one of the most urbanized countries in the world. Yet, Singapore projects itself as a “city in a garden”, with 9,704 hectares or 13.5% of Singapore still covered with greenery, including 3,375 hectares (4.7%) fully protected as Nature Reserves (
Out of the 1,628 described species in 113 oonopid genera worldwide, only 129 valid species, currently assigned under 12 genera, have been described from southeast Asia (
The genus Ischnothyreus Simon, 1893 can be recognized by the presence of leg spines, the usually small abdominal scutum, the strongly sclerotized male palps, the heavily sclerotized male endites and the winding genital tube in the females (
As no oonopids have been deposited at the Lee Kong Chian Natural History Museum in Singapore, a concerted survey of the oonopid spiders was carried out in Singapore in August 2015, with the support and encouragement of the Singapore National Parks Board. From the many specimens of Ischnothyreus collected, neither of the two species of previously recorded from Singapore was recognized. However, we have been able to add five new species of Ischnothyreus to the Singapore Oonopidae inventory.
All the specimens were collected by sifting leaf litter. The specimens were examined using a Leica M205C stereomicroscope. Details were studied under an Olympus BX51 compound microscope. All illustrations were made using a drawing tube and inked on ink jet plotter paper. Photos were made with a Canon EOS 550D zoom digital camera (18 mega pixels) mounted on an Olympus BX51 compound microscope. Vulvae were cleared in lactic acid. Male palps and chelicerae were mounted in Kaiser’s glycerol gelatin. All measurements were taken using an Olympus BX51 compound microscope and are in millimeters.
The following abbreviations are used in the text: ALE = anterior lateral eyes; PLE = posterior lateral eyes; PME = posterior median eyes.
All types of the new species are deposited in Lee Kong Chian Natural History Museum, National University of Singapore (LKCNHM). Other material studied is deposited in Shenyang Normal University (SYNU) in Shenyang, China.
Holotype: male (LKCNHM), Singapore: Central Catchment Nature Reserve, Alt. 60 m, 1°21'21.7"N, 103°48'3.8"E, August 26, 2015, S. Li and Y. Tong leg. Paratypes: 1 male, 5 females (LKCNHM), same data as holotype.
4 females (SYNU-60), Singapore: Central Catchment Nature Reserve, near Mandai Agrotechnology Park, Alt. 46 m, 1°24'53.7"N, 103°47'56.2"E, Sep 1, 2015, S. Li and Y. Tong leg.; 8 females (SYNU-61), Singapore: Central Catchment Nature Reserve, Alt. 46 m, 1°21'13.3"N, 103°48'29.4"E, August 27, 2015, S. Li and Y. Tong leg.; 6 males, 6 females (SYNU-62), Singapore: Central Catchment Nature Reserve, treetop walk, 1°21'13.3"N, 103°48'29.4"E, August 28, 2015, S. Li and Y. Tong leg.; 1 male, 1 female (SYNU-63), Singapore: Central Catchment Nature Reserve, Alt. 39 m, 1°21'17.9"N, 103°47'50.7"E, August 25, 2015, S. Li and Y. Tong leg.; 2 males, 1 female (SYNU-64), Singapore: Central Catchment Nature Reserve, Alt. 39 m, 1°21'17.9"N, 103°47'50.7"E, August 25, 2015, S. Li and Y. Tong leg.
The species's name is derived from the Chinese Pinyin "an", meaning dark, which refers to the color of the palp; term in apposition.
The new species is similar to I. tekek Kranz-Baltensperger, 2012 in having similar thorn-like protrusion (tlp) on the proximal part of the paturon (Figs
Ischnothyreus an sp. n., male. A, C, E habitus, dorsal, lateral and ventral views B, D, F, I prosoma, dorsal, lateral, ventral and anterior views G, H left chelicera, anterior and posterior views. Arrows show the thorn-like protrusion. Scale bars: A, C, E = 0.4 mm; B, D, F, I = 0.2 mm; G, H = 0.1 mm.
Ischnothyreus an sp. n., female. A, C, E habitus, dorsal, lateral and ventral views B, D, F prosoma, dorsal, lateral and ventral views G, I epigastric region, ventral view H epigastric region, ventral view (cleared in lactic acid) J epigastric region, dorsal view. Abbreviations: a = apodeme; tsa = triangular shaped atrium; wt = winding tube. Scale bars: A, C, E = 0.4 mm; B, D, F = 0.2 mm; G–J = 0.1 mm.
Ischnothyreus an sp. n., male. A, D left palp, prolateral view B, E left palp, retrolateral view C, F left palp, dorsal view G, H left chelicera, anterior and posterior views. Abbreviations: fsp = finger-shaped sclerotized process; lsa = leaf-shaped apophysis; tlp = thorn-like protrusion; vp = ventral projection; vpr = ventral protuberance. Scale bars: A–C = 0.1 mm; D–H = 0.05 mm.
Male (holotype). Total length 1.18; carapace 0.65 length, 0.48 width; abdomen 0.57 length, 0.34 width. Habitus as in Fig.
Female (paratype). Total length 1.37; carapace 0.64 length, 0.51 width; abdomen 0.76 length, 0.53 width. Habitus as in Fig.
Singapore.
Holotype: male (LKCNHM), Singapore: Central Catchment Nature Reserve (off Mandai Lake Road), Alt. 39 m, 1°24'30.7"N, 103°46'51.3"E, August 31, 2015, S. Li and Y. Tong leg. Paratypes: 7 males, 8 females (LKCNHM), same data as holotype.
8 males, 14 females (SYNU-65), Singapore: Central Catchment Nature Reserve (off Mandai Lake Road), Alt. 39 m, 1°24'30.7"N, 103°46'51.3"E, August 31, 2015, S. Li and Y. Tong leg.; 3 females (SYNU-66), Singapore: Pulau Ubin, Alt. 2 m, 1°25'18.0"N, 103°56'25.4"E, August 22, 2015, S. Li and Y. Tong leg.;1 female (SYNU-67), Singapore: Central Catchment Nature Reserve (off Mandai Lake Road), Alt. 39 m, 1°24'30.7"N, 103°46'51.3"E, August 31, 2015, S. Li and Y. Tong leg.
The specific epithet means “brown” in Latin, and refers to the body color of this species; adjective.
Males of the new species is similar to those of I. dactylinus sp. n., but can be distinguished from it by the larger eyes and the unmodified chelicerae. Furthermore the distal part of the male palpal bulb lacks the finger-like apophyses present in I. dactylinus (Fig.
Ischnothyreus brunneus sp. n., male. A, C, E habitus, dorsal, lateral and ventral views B, D, F, J prosoma, dorsal, lateral, ventral and anterior views G, left leg IV, retrolateral view H, I chelicerae, anterior and posterior views. Scale bars: A, C, E, G = 0.4 mm; B, D, F, J = 0.2 mm; H, I = 0.1 mm.
Ischnothyreus brunneus sp. n., female. A, C, E habitus, dorsal, lateral and ventral views B, D, F prosoma, dorsal, lateral and ventral views G, H, J epigastric region, ventral view I, K epigastric region, dorsal view (H, I cleared in lactic acid). Abbreviations: a = apodeme; bsa = bell-shaped atrium; wt = winding tube. Scale bars: A, C, E = 0.4 mm; B, D, F = 0.2 mm; G–K = 0.1 mm.
Ischnothyreus brunneus sp. n., male. A, D left palp, prolateral view B left palp, dorsal view C, E left palp, retrolateral view F distal part of palpal bulb, dorsal view G, H left chelicera, anterior and posterior views. Abbreviations: vp = ventral projection; vpr = ventral protuberance. Scale bars: A–C = 0.1 mm; D–H = 0.05 mm.
Male (holotype). Total length 1.36; carapace 0.73 length, 0.57 width; abdomen 0.67 length, 0.48 width. Habitus as in Fig.
Female (paratype). Total length 1.47; carapace 0.76 length, 0.56 width; abdomen 0.79 length, 0.52 width. Habitus as in Fig.
Singapore.
Holotype: male (LKCNHM), Singapore: Central Catchment Nature Reserve, near Singapore Zoo, Alt. 50 m, 1°24'22.3"N, 103°47'7.4"E, August 30, 2015, S. Li and Y. Tong leg. Paratypes: 5 males, 8 females (LKCNHM), same data as holotype.
1 male, 1 female (SYNU-85), Singapore: Bukit Timah Nature Reserve, Alt. 86 m, 1°21'37.4"N, 103°46'30.0"E, August 24, 2015, S. Li and Y. Tong leg.; 7 males, 9 females (SYNU-86), Singapore: Central Catchment Nature Reserve, near Singapore Zoo, Alt. 50 m, 1°24'22.3"N, 103°47'7.4"E, August 30, 2015, S. Li and Y. Tong leg.; 1 male, 8 females (SYNU-87), Singapore: Central Catchment Nature Reserve (off Mandai Lake Road), Alt. 39 m, 1°24'30.7"N, 103°46'51.3"E, August 31, 2015, S. Li and Y. Tong leg.; 1 female (SYNU-88), Singapore: Central Catchment Nature Reserve, near Mandai Agrotechnology Park, Alt. 46 m, 1°24'53.7"N, 103°47'56.2"E, Sep 1, 2015, S. Li and Y. Tong leg.; 1 male, 1 female (SYNU-89), Singapore: Central Catchment Nature Reserve, Alt. 46 m, 1°21'13.3"N, 103°48'29.4"E, August 27, 2015, S. Li and Y. Tong leg.; 1 male, 1 female (SYNU-91), Singapore: Central Catchment Nature Reserve, Alt. 39 m, 1°21'17.9"N, 103°47'50.7"E, August 25, 2015, S. Li and Y. Tong leg.; 1 male (SYNU-92), Singapore: Central Catchment Nature Reserve, Alt. 60 m, 1°21'21.7"N, 103°48'3.8"E, August 26, 2015, S. Li and Y. Tong leg.; 2 females (SYNU-93), Singapore: Bukit Timah Nature Reserve, Bukit Timah Summit, Alt. 163 m, 1°21'16.65"N, 103°46'34.95"E, August 19, 2015, S. Li and Y. Tong leg.; 1 male, 1 female (SYNU-94), Singapore: Bukit Timah Nature Reserve, Bukit Timah Summit, Alt. 163 m, 1°21'16.65"N, 103°46'34.95"E, August 19, 2015, S. Li and Y. Tong leg.; 4 females (SYNU-95), Singapore: Bukit Timah Nature Reserve, Catchment Path, Alt. 107 m, 1°21'12.5"N, 103°46'50.6"E, August 20, 2015, S. Li and Y. Tong leg.; 1 male, 1 female (SYNU-96), Singapore: Bukit Timah Nature Reserve, Bukit Timah Summit, Alt. 163 m, 1°21'16.65"N, 103°46'34.95"E, August 19, 2015, S. Li and Y. Tong leg.; 2 males, 5 females (SYNU-97), Singapore: Central Catchment Nature Reserve, near Singapore Zoo, Alt. 50 m, 1°24'22.3"N, 103°47'7.4"E, August 30, 2015, S. Li and Y. Tong leg.; 1 male, 3 females (SYNU-98), Singapore: Bukit Timah Nature Reserve, Seraya Loop, Alt. 118 m, 1°21'25.4"N, 103°46'25.3"E, August 17, 2015, S. Li and Y. Tong leg.
The specific epithet means “finger-like” in Greek, and refers to the long apophysis on the distal part of the male papal bulb (Fig.
The new species is similar to I. browni Chickering, 1968 (
Male (holotype). Total length 1.43; carapace 0.78 length, 0.57 width; abdomen 0.65 length, 0.39 width. Habitus as in Fig.
Ischnothyreus dactylinus sp. n., female. A, C, E habitus, dorsal, lateral and ventral views B, D, F prosoma, dorsal, lateral and ventral views G, H, J epigastric region, ventral view I, K epigastric region, dorsal view (H, I cleared in lactic acid). Abbreviations: a = apodeme; fsa = fan-shaped atrium; wt = winding tube. Scale bars: A, C, E = 0.4 mm; B, D, F = 0.2 mm; G–K = 0.1 mm.
Ischnothyreus dactylinus sp. n., male. A, D left palp, prolateral view B distal part of palpal bulb, apical view C, E left palp, retrolateral view F, G left chelicera, posterior and anterior views. Abbreviations: fdp = flake-like dorsal process; mta = membranous, triangle-shaped apophysis; sfa = sclerotized, finger-like apophysis; vp = ventral projection; vpr = ventral protuberance. Scale bars: A–C = 0.1 mm; D–G = 0.05 mm.
Female (paratype). Total length 1.51; carapace 0.73 length, 0.58 width; abdomen 0.76 length, 0.49 width. Habitus as in Fig.
Singapore.
Holotype: male (LKCNHM), Singapore: Central Catchment Nature Reserve, near Singapore Zoo, Alt. 50 m, 1°24'22.3"N, 103°47'7.4"E, August 30, 2015, S. Li and Y. Tong leg. Paratypes: 1 female (LKCNHM), same data as holotype; 1 female (LKCNHM), Singapore: Bukit Timah Nature Reserve, Alt. 86 m, 1°21'37.4"N, 103°46'30.0"E, August 24, 2015, S. Li and Y. Tong leg.
2 females (SYNU-71), Singapore: Central Catchment Nature Reserve, near Mandai Agrotechnology Park, Alt. 46 m, 1°24'53.7"N, 103°47'56.2"E, Sep 1, 2015, S. Li and Y. Tong leg.; 1 female (SYNU-72), Singapore: Central Catchment Nature Reserve, Alt. 46 m, 1°21'13.3"N, 103°48'29.4"E, August 27, 2015, S. Li and Y. Tong leg.
The specific epithet means “bowl” in Latin, and refers to the bowl-shaped atrium in the female epigastric region; noun.
The new species is similar to I. campanaceus Tong & Li, 2008, but can be distinguished from it by the small abdominal dorsal scutum, the long sclerotized process (lsp) and small sclerotized triangular-shaped apophysis (sta) at base of fangs in male (Fig.
Ischnothyreus poculum sp. n., male. A, C, E habitus, dorsal, lateral and ventral views B, D, F, I prosoma, dorsal, lateral, ventral and anterior views G, H left chelicerae, anterior and posterior views. Abbreviations: lsp = long sclerotized process; sta = sclerotized triangular-shaped apophysis. Scale bars: A, C, E = 0.4 mm; B, D, F, I = 0.2 mm; G, H = 0.1 mm.
Ischnothyreus poculum sp. n., female. A, C, E habitus, dorsal, lateral and ventral views B, D, F prosoma, dorsal, lateral and ventral views G, H, J epigastric region, ventral view I, K epigastric region, dorsal view (H, I cleared in lactic acid). Abbreviations: a = apodeme; bsa = bowl-shaped atrium; dp = depression; wt = winding tube. Scale bars: A, C, E = 0.4 mm; B, D, F = 0.2 mm; G–K = 0.1 mm.
Ischnothyreus poculum sp. n., male. A, D left palp, prolateral view B, F left palpal bulb, dorsal view C, E left palp, retrolateral view G, H left chelicerae, anterior and posterior views. Abbreviations: lsp = long sclerotized process; sta = sclerotized triangular-shaped apophysis; vp = ventral projection; vpr = ventral protuberance. Scale bars: 0.1 mm.
Male (holotype). Total length 1.64; carapace 0.83 length, 0.67 width; abdomen 0.80 length, 0.46 width. Habitus as in Fig.
Female (paratype). Total length 1.55; carapace 0.73 length, 0.61 width; abdomen 0.82 length, 0.59 width. Habitus as in Fig.
Singapore.
Holotype: male (LKCNHM), Singapore: Central Catchment Nature Reserve, near Mandai Agrotechnology Park, Alt. 46 m, 1°24'53.7"N, 103°47'56.2"E, Sep 1, 2015, S. Li and Y. Tong leg. Paratypes: 7 males, 7 females (LKCNHM), same data as holotype.
2 males, 1 female (SYNU-73), Singapore: Bukit Timah Nature Reserve, Alt. 86 m, 1°21'37.4"N, 103°46'30.0"E, August 24, 2015, S. Li and Y. Tong leg.; 7 males, 10 females (SYNU-74), Singapore: Central Catchment Nature Reserve, near Singapore Zoo, Alt. 50 m, 1°24'22.3"N, 103°47'7.4"E, August 30, 2015, S. Li and Y. Tong leg.; 12 females (SYNU-75), Singapore: Bukit Timah Nature Reserve, Seraya Loop, Alt. 118 m, 1°21'25.4"N, 103°46'25.3"E, August 17, 2015, S. Li and Y. Tong leg.; 6 males, 9 females (SYNU-76), Singapore: Central Catchment Nature Reserve (off Mandai Lake Road), Alt. 39 m, 1°24'30.7"N, 103°46'51.3"E, August 31, 2015, S. Li and Y. Tong leg.; 2 males, 5 females (SYNU-77), Singapore: Bukit Timah Nature Reserve, Catchment Path, Alt. 107 m, 1°21'12.5"N, 103°46'50.6"E, August 20, 2015, S. Li and Y. Tong leg.; 6 males, 11 females (SYNU-78), Singapore: Central Catchment Nature Reserve, near Singapore Zoo, Alt. 50 m, 1°24'22.3"N, 103°47'7.4"E, August 30, 2015, S. Li and Y. Tong leg.; 4 males, 3 females (SYNU-79), Singapore: Bukit Timah Nature Reserve, Jungle Fall Stream, Alt. 118 m, 1°21'25.4"N, 103°46'25.3"E, August 18, 2015, S. Li and Y. Tong leg.; 3 males, 3 females (SYNU-80), Singapore: Bukit Timah Nature Reserve, Jungle Fall Stream, Alt. 118 m, 1°21'25.4"N, 103°46'25.3"E, August 18, 2015, S. Li and Y. Tong leg.; 2 males, 2 females (SYNU-81), Singapore: Bukit Timah Nature Reserve, Jungle Fall Stream, Alt. 118 m, 1°21'25.4"N, 103°46'25.3"E, August 18, 2015, S. Li and Y. Tong leg.; 2 males, 2 females (SYNU-82), Singapore: Bukit Timah Nature Reserve, Bukit Timah Summit, Alt. 163 m, 1°21'16.65"N, 103°46'34.95"E, August 19, 2015, S. Li and Y. Tong leg.; 1 female (SYNU-83), Singapore: Bukit Timah Nature Reserve, Catchment Path, Alt. 107 m, 1°21'12.5"N, 103°46'50.6"E, August 20, 2015, S. Li and Y. Tong leg.; 2 females (SYNU-84), Singapore: Central Catchment Nature Reserve (off Mandai Lake Road), Alt. 39 m, 1°24'30.7"N, 103°46'51.3"E, August 31, 2015, S. Li and Y. Tong leg.; 2 males, 1 female (SYNU-90), Singapore: Pulau Ubin, Alt. 2 m, 1°25'18.0"N, 103°56'25.4"E, August 22, 2015, S. Li and Y. Tong leg.
The specific epithet means “usable to cover a roof” in Latin, and refers to the long protruding extension on male clypeus; adjective.
The new species can be distinguished from the congeneric species by the strongly protruding extension (spe) on male clypeus (Fig.
Ischnothyreus tectorius sp. n., male. A, C, E habitus, dorsal, lateral and ventral views B, D, F, I prosoma, dorsal, lateral, ventral and anterior views G, H left chelicera, anterior and posterior views. Abbreviations: spe = strongly protruding extension; ste = sclerotized, triangular extension. Scale bars: A, C, E = 0.4 mm; B, D, F, I = 0.2 mm; G, H = 0.1 mm.
Ischnothyreus tectorius sp. n., female. A, C, E habitus, dorsal, lateral and ventral views B, D, F prosoma, dorsal, lateral and ventral views G, H, J epigastric region, ventral view I, K epigastric region, dorsal view (H, I cleared in lactic acid). Abbreviations: a = apodeme; pls = plate-like sclerite; tsa = triangular-shaped atrium; wt = winding tube. Scale bars: A, C, E =0.4 mm; B, D, F = 0.2 mm; G–K = 0.1 mm.
Male (holotype). Total length 1.26; carapace 0.73 length, 0.57 width; abdomen 0.65 length, 0.35 width. Habitus as in Fig.
Female (paratype). Total length 1.24; carapace 0.72 length, 0.44 width; abdomen 0.77 length, 0.56 width. Habitus as in Fig.
Singapore.
We are indebted to Dr. Lena Chan of the National Biodiversity Centre, National Parks Board, Singapore (NParks) for supporting this joint project between Singapore and PRC arachnologists. We are grateful to NParks for permission to collect oonopids in the nature reserves and other protected areas in Singapore (NP/PR12-070 & NP/PR15-45a). We are also grateful to Cor Vink (Canterbury Museum, Christchurch, New Zealand), Karen Edward (The University of Western Australia, Perth, Australia), Miguel Richard (Natural History Museum, Bern, Switzerland), and Yvonne Kranz-Baltensperger (Natural History Museum, Bern, Switzerland) for their comments on the manuscript. This study was supported by the National Natural Science Foundation of China (NSFC-31372157, 31572237) and the State Key Laboratory of Forest and Soil Ecology (Grant No. LFSE2015-11) to Yanfeng Tong, by the National Natural Science Foundation of China (NSFC-31272280, 31471960, 31530067) and the Southeast Asia Biodiversity Research Institute, Chinese Academy of Sciences (2015CASEABRI005, Y4ZK111B01) to Shuqiang Li, and by a Research Fellowship awarded in 2015 by National Biodiversity Centre, National Parks Board, Singapore, to Joseph K H Koh.