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

Five species are documented as new to science, and three known species, which the female of B. besutensis is described for the first time.

        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.

        During July to August 2015, Prof. Shuqiang LI, scientist of Zoology Institute, collected spiders specimens from various locations in Singapore by sifting leaf litter. 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).And 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.

        Singapore was home to four species of armored spiders, according to Murphy and Murphy (2000: 548, fg 59.1–3). They included Singaporemma singulare Shear, 1978, which was the type species of the genus named after Singapore. The remaining three armored spiders comprised an unidentified species of Paculla collected from Bukit Timah in Singapore, and two species previously described from Malaysia and Vietnam: Brignoliella michaeli Lehtinen, 1981 and Singaporemma halongense Lehtinen, 1981. Their current study suggests that the Singaporemma in Singapore comprise S. singulare and a second Singaporemma not identical to S. halongense, but a new species closely related to it, and further suggests that the unidentifed Paculla referred to by Murphy and Murphy (2000: 370, fg 59.1) is probably one of the two new species of Paculla.

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Paculla globosa sp. n., male holotype (A–B) and female paratype (C–D). Scale bars 0.50 mm

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Paculla bukittimahensis sp. n., male holotype (A–B) and female paratype (C–D)Scale bars 0.50 mm

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Brignoliella besutensis Lin, Li & Jäger, 2012, male (A–B) and female (C–D) from Singapore.Scale bars 0.10 mm

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Singaporemma singulare Shear, 1978, male holotype (A–B) and female paratype (C–D).Scale bars 0.10 mm