Research Article |
Corresponding author: Shuqiang Li ( lisq@ioz.ac.cn ) Academic editor: Cor Vink
© 2017 Yucheng Lin, Joseph K. H. Koh, Seppo Koponen, 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:
Lin Y, Koh JKH, Koponen S, Li S (2017) Taxonomic notes on the armored spiders of the families Pacullidae and Tetrablemmidae (Arachnida, Araneae) from Singapore. ZooKeys 661: 15-60. https://doi.org/10.3897/zookeys.661.10677
|
Eight species of armored spiders belonging to two families, Pacullidae Simon, 1894 and Tetrablemmidae O. Pickard-Cambridge, 1873, are reported from Singapore. Five species are documented as new to science: Paculla bukittimahensis Lin & Li, sp. n. (male and female), P. globosa Lin & Li, sp. n. (male and female), Ablemma malacca Lin & Li, sp. n. (male and female), Singaporemma lenachanae Lin & Li, sp. n. (male and female), and Sulaimania brevis Lin & Li, sp. n. (male). The three known species are Brignoliella besutensis Lin, Li & Jäger, 2012, B. michaeli Lehtinen, 1981, and Singaporemma singulare Shear, 1978, of which the female of B. besutensis is described for the first time. For comparison, types of Singaporemma adjacens Lehtinen, 1981 from Vietnam, Singaporemma halongense Lehtinen, 1981 from Vietnam, Singaporemma singulare from Singapore and Sulaimania vigelandi Lehtinen, 1981 from Malaysia are studied and photographed.
Taxonomy, pacullids, tetrablemmids, morphology, southeast Asia
Tetrablemmids and pacullids are collectively known as armored spiders because their abdomen is characteristically armor-plated with complicated abdominal scuta. Family placement of these haplogyne spiders has gone through a rather tortuous journey. Tetrablemmidae was first established by O.
According to
Altogether, this paper records a total of eight species of armored spiders in Singapore. They include two new species of Paculla (Pacullidae). Among the Tetrablemmidae described and re-described in this paper are S. singulare, along with a new species each of Ablemma, Singaporemma and Sulaimania. The presence of Brignoliella besutensis Lin, Li & Jäger, 2012 in Singapore was ascertained for the first time, while the presence of B. michaeli was revalidated.
All specimens were collected from July to August 2015 from various locations in Singapore by sifting leaf litter. Specimens were preserved in 95% ethanol. They were examined and measured under a Leica M205 C stereomicroscope. Further details were studied under an Olympus BX43 compound microscope. Vulvae were removed and treated in lactic acid. To reveal the course of the spermatic duct, the palpal bulbs were treated in lactic acid and mounted in Hoyer’s Solution. Photographs were taken with a Canon EOS 60D wide zoom digital camera (8.5 megapixels). The images were combined using Helicon Focus 3.10.3 software (
All measurements are in millimetres. Height of carapace is measured with tubercle. Leg measurements are given in the following sequence: total length (femur, patella, tibia, metatarsus, and tarsus). Abbreviations in figures are as follows: A – anal plate; ALG – anterolateral groove of preanal plate; AT – atrium; AV – anterior ventrolateral plate; EF – epigynal fold; EP – epigynal pit; ep – embolic part of apes of palpal organ; IVP – inner vulval plate; L – lateral plate; LH – lateral horn; MV – median ventrolateral plate; MVB – bridge fragments of MV; P – pulmonary plate; PA – preanal plate; PG – postgenital plate; PLC – posterolateral corner of PA; PMC – posteromedial corner of PA; PV – posterior ventrolateral plate; sd – spermatic duct; sl – subterminal lamella; SR – seminal receptaculum; VD – vulval duct; VS – vulval stem. Abbreviations in text include: AER – anterior eye row; ALE – anterior lateral eye; AME – anterior median eye; PLE – posterior lateral eye. References to figures in the cited papers are listed in lowercase (fig. or figs); figures from this paper are noted with an initial capital (Fig. or Figs).
All types of the new species are deposited in the Lee Kong Chian Natural History Museum, National University of Singapore (
Phaedima granulosa Thorell, 1881 from New Guinea (see
Holotype ♂ (
1♂ and 3♀ (
The specific name refers to the type locality; adjective.
This new species can be distinguished from all congeners with the exception of P. mului Bourne, 1981 and P. wanlessi Bourne, 1981 by the wide, short embolus (Fig.
Paculla bukittimahensis sp. n., male holotype (A–B, E) and female paratype (C–D, F–G). A–F habitus G genital area (untreated). A, C dorsal B, D, G ventral E–F lateral. Abbreviations: A = anal plate; AV = anterior ventrolateral plate; L = lateral plate; P = pulmonary plate; PA = preanal plate; PG = postgenital plate; PV = posterior ventrolateral plate. Scale bars: 0.50 mm.
Male (holotype). Coloration: body dark reddish brown; legs reddish-brown.
Measurements: total length 4.05; carapace 1.80 long, 1.35 wide, 1.12 high; abdomen 2.35 long, 1.65 wide, 1.78 high; clypeus 0.45 high; sternum 1.05 long, 0.90 wide. Length of legs: I 7.01 (2.12, 0.53, 2.00, 1.52, 0.84); II 5.85 (1.81, 0.50, 1.54, 1.25, 0.75); III 4.82 (1.45, 0.45, 1.20, 1.10, 0.62); IV 6.64 (2.00, 0.51, 1.83, 1.62, 0.68).
Prosoma (Fig.
Opisthosoma (Fig.
Palp (Fig.
Female (one of paratypes). Coloration as in male.
Measurements: total length 4.42; carapace 1.85 long, 1.40 wide, 1.13 high; abdomen 2.85 long, 1.85 wide, 2.03 high; clypeus 0.43 high; sternum 1.10 long, 0.97 wide. Length of legs: I 7.37 (2.27, 0.55, 2.10, 1.60, 0.85); II 6.11 (1.90, 0.50, 1.60, 1.38, 0.73); III 5.19 (1.55, 0.49, 1.30, 1.20, 0.65); IV 7.19 (2.15, 0.52, 2.00, 1.77, 0.75). Length of palp: 1.62 (0.48, 0.21, 0.35, 0.58).
Carapace, abdomen, and legs as in male (Fig.
Genitalia (Figs
Paculla bukittimahensis sp. n., female paratype. A genital area (lactic acid-treated), ventral Bditto, dorsal. Abbreviations: AT = atrium; AV = anterior ventrolateral plate; MV = median ventrolateral plate; MVB = bridge fragments of MV; P = pulmonary plate; PA = preanal plate; PG = postgenital plate; PV = posterior ventrolateral plate. Scale bars: 0.50 mm.
Singapore.
Holotype ♂ (
The specific epithet derives from the Latin word “globosus” = globular, drawing attention to the shape of palpal bulb; adjective.
This new species can be distinguished from all congeners with the exception of P. sulaimani Lehtinen, 1981 by the globular bulb (Fig.
Paculla globosa sp. n., male holotype (A–B, E) and female paratype (C–D, F–G). A–F habitus G genital area (untreated). A, C dorsal B, D, G ventral E–F lateral. Abbreviations: A = anal plate; AV = anterior ventrolateral plate; L = lateral plate; MV = median ventrolateral plate; P = pulmonary plate; PA = preanal plate; PG = postgenital plate. Scale bars: 0.50 mm.
Male (holotype). Coloration: body dark reddish brown; legs reddish-brown.
Measurements: total length 4.40; carapace 1.95 long, 1.40 wide, 1.20 high; abdomen 2.50 long, 1.90 wide, 2.30 high; clypeus 0.49 high; sternum 1.30 long, 1.00 wide. Length of legs: I 8.28 (2.53, 0.65, 2.35, 1.75, 1.00); II 6.95 (2.10, 0.60, 1.85, 1.50, 0.90); III 5.75 (1.70, 0.54, 1.41, 1.30, 0.80); IV 8.16 (2.50, 0.62, 2.30, 1.91, 0.83).
Prosoma (Fig.
Opisthosoma (Fig.
Palp (Fig.
Female (paratype). Coloration as in male.
Measurements: total length 4.50; carapace 1.85 long, 1.45 wide, 1.20 high; abdomen 2.67 long, 1.80 wide, 2.21 high; clypeus 0.43 high; sternum 1.14 long, 0.97 wide. Length of legs: I 7.35 (2.25, 0.55, 2.10, 1.65, 0.80); II 6.23 (1.95, 0.53, 1.65, 1.35, 0.75); III 5.22 (1.55, 0.50, 1.30, 1.22, 0.65); IV 7.20 (2.15, 0.54, 2.00, 1.80, 0.71). Length of palp: 1.58 (0.45, 0.21, 0.34, 0.38).
Carapace, abdomen, and legs as in male (Fig.
Genitalia (Figs
Paculla globosa sp. n., female paratype. A genital area (lactic acid-treated), ventral Bditto, dorsal. Abbreviations: AT = atrium; AV = anterior ventrolateral plate; MV = median ventrolateral plate; MVB = bridge fragments of MV; P = pulmonary plate; PA = preanal plate; PG = postgenital plate; PV = posterior ventrolateral plate. Scale bars: 0.50 mm.
Singapore.
Ablemma baso Roewer, 1963 from Sumatra (see
Holotype ♂ (
1♂ and 1♀ (
The specific epithet refers to the Strait of Malacca, which separates Singapore from the Indonesian island of Sumatra; noun.
This new species can be distinguished from all its congeners with the exception of A. datahu Lehtinen, 1981, A. makiling Lehtinen, 1981, A. shimojanai (Komatsu, 1968), A. singalang Lehtinen, 1981, and A. unicornis Burger, 2008 by the absence of a long, pointed tooth on male cephalic area posteriorly (Fig.
Male (holotype). Coloration: body brownish-yellow; legs yellowish-orange.
Measurements: total length 1.08; carapace 0.49 long, 0.44 wide, 0.47 high; abdomen 0.66 long, 0.50 wide, 0.40 high; clypeus 0.24 high; sternum 0.31 long, 0.30 wide. Length of legs: I 1.14 (0.39, 0.13, 0.28, 0.16, 0.18); II 1.01 (0.33, 0.12, 0.23, 0.16, 0.17); III 0.88 (0.28, 0.11, 0.18, 0.17, 0.14); IV 1.19 (0.37, 0.13, 0.30, 0.22, 0.17).
Prosoma (Fig.
Opisthosoma (Fig.
Palp (Fig.
Female (one of paratypes). Coloration: same as in male.
Measurements: total length 1.10; carapace 0.52 long, 0.42 wide, 0.42 high; abdomen 0.72 long, 0.54 wide, 0.42 high; clypeus 0.14 high; sternum 0.31 long, 0.31 wide. Length of legs: I 1.14 (0.38, 0.14, 0.25, 0.17, 0.20); II 1.00 (0.32, 0.13, 0.22, 0.16, 0.17); III 0.88 (0.26, 0.12, 0.17, 0.18, 0.15); IV 1.16 (0.36, 0.13, 0.29, 0.20, 0.18).
Prosoma (Fig.
Opisthosoma (Figs
Genitalia (Fig.
Ablemma malacca sp. n., female paratype. A opisthosoma B genital area (untreated) C cleared vulva (lactic acid-treated) Dditto. A–B, D ventral C dorsal. Abbreviations: A = anal plate; AV = anterior ventrolateral plate; EF = epigynal fold; EP = epigynal pit; IVP = inner vulval plate; LH = lateral horn; PA = preanal plate; PG = postgenital plate; PLC = posterolateral corner of PA; PMC = posteromedial corner of PA; SR = seminal receptaculum; VD = vulval duct; VS = vulval stem. Scale bars: 0.10 mm.
Singapore.
Polyaspis acuminata Simon, 1889 from New Caledonia (see
B.
besutensis
1♂ and 8♀ (
B. besutensis is similar to B. caligiformis Tong & Li, 2008 from Hainan Island, China (see Tong, 2013: 76, fig. 91A–G), but male can be distinguished by the non-inflated palpal tibia, the pear-shaped bulb, the horn-shaped embolus, and the slightly sinuous course of the spermatic duct (Fig.
Male. Coloration: body reddish-brown; legs pale reddish-brown to yellowish-brown.
Measurements: total length 1.16; carapace 0.58 long, 0.48 wide, 0.47 high; abdomen 0.72 long, 0.56 wide, 0.48 high; clypeus 0.16 high; sternum 0.32 long, 0.32 wide. Length of legs: I 1.25 (0.40, 0.14, 0.28, 0.21, 0.22); II 1.14 (0.36, 0.13, 0.25, 0.19, 0.21); III 1.01 (0.30, 0.12, 0.21, 0.19, 0.19); IV 1.29 (0.40, 0.13, 0.30, 0.26, 0.20).
Prosoma (Fig.
Opisthosoma (Fig.
Palp (Fig.
Female (First description). Coloration: same as in male.
Measurements: total length 1.18; carapace 0.56 long, 0.48 wide, 0.46 high; abdomen 0.84 long, 0.64 wide, 0.52 high; clypeus 0.12 high; sternum 0.33 long, 0.34 wide. Length of legs: I 1.22 (0.40, 0.14, 0.26, 0.20, 0.22); II 1.14 (0.36, 0.13, 0.24, 0.20, 0.21); III 0.98 (0.30, 0.12, 0.19, 0.20, 0.17); IV 1.26 (0.39, 0.13, 0.28, 0.24, 0.22).
Prosoma (Fig.
Opisthosoma (Figs
Brignoliella besutensis Lin, Li & Jäger, 2012, female from Singapore. A opisthosoma B genital area (untreated) C cleared vulva (lactic acid-treated) Dditto. A–B, D ventral C dorsal. Abbreviations: ALG = anterolateral groove of preanal plate; AV = anterior ventrolateral plate; EF = epigynal fold; EP = epigynal pit; L = lateral plate; P = pulmonary plate; PA = preanal plate; PG = postgenital plate; SR = seminal receptaculum; VD = vulval duct; VS = vulval stem. Scale bars: 0.10 mm.
Genitalia (Fig.
Malaysia, Singapore.
B. michaeli Lehtinen, 1981: 41, figs 103–106, 108, 111 (male and female) from Penang, Malaysia.
19♂ and 29♀ (
B. michaeli can be distinguished from all congeners with the exception of B. besutensis, B. caligiformis, B. maoganensis Tong & Li, 2008, B. maros Lehtinen, 1981, B. martensi (Brignoli, 1972), and B. massai Lehtinen, 1981 by the long, pear-shaped bulb or by the long, furcated clypeal horn. It differs from B. besutensis (Figs
Male. Coloration: body brownish-yellow; legs yellowish-orange.
Measurements: total length 1.38; carapace 0.74 long, 0.56 wide, 0.60 high; abdomen 0.82 long, 0.65 wide, 0.56 high; clypeus 0.20 high; sternum 0.37 long, 0.38 wide. Length of legs: I 1.45 (0.46, 0.16, 0.34, 0.25, 0.24); II 1.34 (0.42, 0.15, 0.30, 0.24, 0.23); III 1.21 (0.36, 0.14, 0.26, 0.23, 0.22); IV 1.53 (0.48, 0.15, 0.36, 0.30, 0.24).
Prosoma (Fig.
Opisthosoma (Fig.
Palp (Fig.
Female. Coloration: same as in male, but deeper in opisthosoma.
Measurements: total length 1.34; carapace 0.66 long, 0.56 wide, 0.56 high; abdomen 0.90 long, 0.72 wide, 0.66 high; clypeus 0.14 high; sternum 0.36 long, 0.38 wide. Length of legs: I 1.55 (0.50, 0.17, 0.35, 0.27, 0.26); II 1.44 (0.46, 0.16, 0.32, 0.26, 0.24); III 1.29 (0.39, 0.15, 0.28, 0.25, 0.22); IV 1.63 (0.51, 0.16, 0.38, 0.32, 0.26).
Prosoma (Fig.
Opisthosoma (Figs
Brignoliella michaeli Lehtinen, 1981, female from Singapore. A opisthosoma B genital area (untreated) C cleared vulva (lactic acid-treated) Dditto. A–B, D ventral C dorsal. Abbreviations: A = anal plate; ALG = anterolateral groove of preanal plate; AV = anterior ventrolateral plate; EF = epigynal fold; EP = epigynal pit; MV = median ventrolateral plate; P = pulmonary plate; PA = preanal plate; PG = postgenital plate; SR = seminal receptaculum; VD = vulval duct; VS = vulval stem. Scale bars: 0.10 mm.
Genitalia (Fig.
Malaysia, Singapore.
Singaporemma singulare Shear, 1978 from Singapore (see
Holotype ♂ (
3♂ and 2♀ (
Singaporemma halongense Lehtinen, 1981 (Figs
Patronymic in honour of Dr Lena Chan from the National Biodiversity Centre, Singapore in recognition of her support of this study; noun (name) in genitive case.
This new species can be distinguished from all other congeners with the exception of S. banxiaoensis Lin & Li, 2014, S. halongense and S. singulare by the slender, straight embolus without any furcated end (Fig.
Male (holotype). Coloration: body reddish-brown; legs yellowish-brown.
Measurements: total length 0.86; carapace 0.42 long, 0.38 wide, 0.40 high; abdomen 0.58 long, 0.49 wide, 0.39 high; clypeus 0.17 high; sternum 0.24 long, 0.27 wide. Length of legs: I 0.95 (0.31, 0.11, 0.22, 0.15, 0.16); II 0.87 (0.27, 0.10, 0.20, 0.15, 0.15); III 0.77 (0.24, 0.10, 0.16, 0.14, 0.13); IV 0.99 (0.33, 0.11, 0.23, 0.17, 0.15).
Prosoma (Fig.
Opisthosoma (Fig.
Palp (Figs
Female (one of paratypes). Coloration: same as in male.
Measurements: total length 0.96; carapace 0.44 long, 0.38 wide, 0.41 high; abdomen 0.64 long, 0.52 wide, 0.40 high; clypeus 0.15 high; sternum 0.26 long, 0.27 wide. Length of legs: I 0.91 (0.28, 0.12, 0.20, 0.15, 0.16); II 0.83 (0.26, 0.11, 0.18, 0.14, 0.14); III 0.76 (0.24, 0.10, 0.16, 0.13, 0.13); IV 0.98 (0.32, 0.11, 0.22, 0.17, 0.16).
Prosoma (Fig.
Opisthosoma (Figs
Genitalia (Fig.
Singaporemma lenachanae sp. n., female paratype. A opisthosoma B genital area (untreated) C cleared vulva (lactic acid-treated) Dditto. A–B, D ventral C dorsal. Abbreviations: A = anal plate; AV = anterior ventrolateral plate; EP = epigynal pit; IVP = inner vulval plate; L = lateral plate; LH = lateral horn; MV = median ventrolateral plate; PA = preanal plate; PG = postgenital plate; SR = seminal receptaculum; VD = vulval duct; VS = vulval stem. Scale bars: 0.10 mm.
Singapore.
S. singularis Shear, 1978: 36, figs 108–111; Lehtinen, 1981: 31.
Holotype ♂ and paratype 1♀ (
10♂ and 6♀ (
Singaporemma adjacens Lehtinen, 1981 (Fig.
Singaporemma singulare Shear, 1978, male holotype (A–E) and female paratype (G–H), and S. adjacens Lehtinen, 1981, male holotype (F). A–C, E–F left palp D embolic end G opisthosoma H Genital area (untreated). A, D prolateral B, F retrolateral C anterior E, G–H ventral. Abbreviations: A = anal plate; ep = embolic part of apes of palpal organ; L = lateral plate; MV = median ventrolateral plate; P = pulmonary plate; PA = preanal plate; PG = postgenital plate. Scale bars: 0.10 mm, D 0.05 mm .
S. singulare is distinguished from S. bifurcata (see Lin and Li, 2010: 26, figs 35–37) and S. wulongensis (see Lin and Li, 2014: 46, fig. 8A–F) by the embolus without any furcate end; from S. adjacens (see Fig.
Male. Coloration: body reddish-brown; legs yellowish-brown.
Measurements: total length 1.14; carapace 0.50 long, 0.45 wide, 0.44 high; abdomen 0.73 long, 0.60 wide, 0.52 high; clypeus 0.19 high; sternum 0.30 long, 0.33 wide. Length of legs: I 1.24 (0.40, 0.13, 0.30, 0.19, 0.22); II 1.10 (0.34, 0.12, 0.26, 0.18, 0.20); III 0.99 (0.30, 0.12, 0.22, 0.17, 0.18); IV 1.36 (0.43, 0.14, 0.34, 0.23, 0.22).
Prosoma (Fig.
Opisthosoma (Figs
Palp (Figs
Female. Coloration: body slightly lighter than in male; legs yellowish-brown.
Measurement: total length 1.18; carapace 0.50 long, 0.44 wide, 0.44 high; abdomen 0.74 long, 0.63 wide, 0.56 high; clypeus 0.17 high; sternum 0.29 long, 0.32 wide. Length of legs: I 1.24 (0.40, 0.14, 0.28, 0.20, 0.22); II 1.14 (0.37, 0.13, 0.25, 0.19, 0.20); III 1.04 (0.32, 0.12, 0.22, 0.18, 0.20); IV 1.39 (0.44, 0.13, 0.35, 0.24, 0.23).
Singaporemma singulare Shear, 1978 , female specimen from Singapore. A opisthosoma B genital area (untreated) C cleared vulva (lactic acid-treated) Dditto. A–B, D ventral C dorsal. Abbreviations: A = anal plate; AV = anterior ventrolateral plate; EP = epigynal pit; IVP = inner vulval plate; L = lateral plate; LH = lateral horn; MV = median ventrolateral plate; P = pulmonary plate; PA = preanal plate; PG = postgenital plate; SR = seminal receptaculum; VD = vulval duct; VS = vulval stem. Scale bars: 0.10 mm.
Prosoma (Fig.
Opisthosoma (Figs
Genitalia (Figs
Singapore.
This species is originally described from Singapore and was designated as the type species of the genus Singaporemma by
Sulaimania vigelandi Lehtinen, 1981 from Malaysia (see
Holotype ♂ (
2♂ (
Sulaimania vigelandi (Fig.
The specific epithet derives from the Latin word “brevis” = short, and refers to the short embolus; adjective.
This new species shares certain characteristics of the genus Sulaimania, including eye arrangement, habitus, and the general configuration of the male palp similar to that of the type species, S. vigelandi (see Fig.
Male (holotype). Coloration: body and legs light brownish yellow.
Measurements: total length 0.78; carapace 0.46 long, 0.31 wide, 0.27 high; abdomen 0.48 long, 0.34 wide, 0.28 high; clypeus 0.10 high; sternum 0.23 long, 0.22 wide. Length of legs: I 0.78 (0.25, 0.10, 0.18, 0.12, 0.13); II 0.71 (0.22, 0.09, 0.15, 0.12, 0.13); III 0.61 (0.18, 0.08, 0.12, 0.11, 0.12); IV 0.80 (0.25, 0.08, 0.19, 0.14, 0.14). Leg formula: IV-I-II-III.
Prosoma (Fig.
Opisthosoma (Fig.
Palp (Fig.
Female. Unknown.
Singapore.
The manuscript benefitted greatly from comments by Cor Vink (Christchurch, New Zealand), William A. Shear (Virginia, USA), Yanfeng Tong (Shenyang, China) and Peter Jäger (Frankfurt am Main, Germany). Dr Lena Chan of the National Biodiversity Centre, National Parks Board, Singapore (NParks) supported this joint project between Singapore and PRC arachnologists. NParks allowed us to collect armored spiders in the nature reserves and other protected areas in Singapore (NP/PR12-070 & NP/PR15-45a). Lorenzo Prendini (New York, USA), Louis N. Sorkin (New York, USA) and Xinping Wang (Gainesville, USA) facilitated the loan of type materials of Singaporemma singulare. This study was supported by the National Natural Science Foundation of China (NSFC-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, NParks, to Joseph K. H. Koh.