Taxonomic notes on the armored spiders of the families Pacullidae and Tetrablemmidae (Arachnida, Araneae) from Singapore

Abstract

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), Paculla 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, Brignoliella michaeli Lehtinen, 1981, and Singaporemma singulare Shear, 1978, of which the female of Brignoliella 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.

Description of four new species of armoured spiders (Araneae, Tetrablemmidae) from Sumatra, Indonesia

“…This new species can be distinguished from all congeners by the long and narrow embolus, and the shorter length of the clypeal horn (Figs 34, 37). From similar species, B.besutensis (see Lin et al 2017: 33, figs 11A–B) by the longer and thinner embolus, and from B.michaeli (see Lehtinen 1981: 119, figs 103–106) by the shorter length of the clypeal horn in males (Figs 34, 37). Females are distinguished from B.besutensis and B.michaeli (see Lin et al 2017: fig.…”

“…Otherwise males and females were matched based on the following criteria: (1) collected in the same sample, (2) body size and colour, and (3) abundance. Morphological nomenclature follows Lin et al (2017, 2018).…”

“…n. differ from A.unicornis by the lack of an anterior tooth on the carapace behind the eye group (Figs 8, 11) vs. present in A.unicornis (see Burger 2008, 254, figs 1, 2); from A.erna and A.kaindi (see Lehtinen 1981, 128-129, figs 166, 171) by its shorter and flatter embolus, and the more elongated palpal bulb (Figs 12, 13); from A.malacca by the concave and swollen pars cephalica (Fig. 11), straight and not swollen in the latter (see Lin et al 2017, fig. 7).…”

“…Furthermore, females are distinguished from A.malacca with similar internal genitalia, by the larger carapace tubercles (Fig. 31), smaller in the latter species (see Lin et al 2017, fig. 7H).…”

“…The south Asian fauna of the families Tetrablemmidae and Pacullidae was first studied by Shear (1978) followed by Deeleman-Reinhold (1980) and finally in 1981, Lehtinen published a world revision that united the two families into the family Tetrablemmidae. More recently, taxonomic work has been done on the Asian fauna by Lin et al (2012, 2017, 2018).…”