Due to the laterally flattened abdomen, which is significantly wider than the thorax, the species is considered easy to identify.

It can be distinguished from the closely related Planispectrum hainanense by the hairless legs, which have their middle and hind femurs only slightly widened fin-like lamellae on the front and rear area.

It was collected on December 2, 1988 by B. Hauser at an altitude of 180 to 380 metres (590 to 1,250 ft) and is from the Tai Mo Shan Country Park.

In addition to the holotype, another female is mentioned, which was photographed in the collection of the University of Hong Kong without location information.

[2] A parthenogenetic stock of Planispectrum hongkongense has been in breeding in Europe since 2020. it goes back to a female that the Czech Luděk Šulda in the Tai Tam Country Park of Hong Kong took away on November 20, 2019, while he was looking for ants.

Using adult females of the first offspring generation, Potocký determined the species 2021 and named the breeding line after the origin as Planispectrum hongkongense 'Tai Tam '.