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It clearly belongs to the Pholcidae family and possibily the Pholcus genus, but I can't find a picture of any similar spider on the Internet.
Note that the legs of the spider in the picture are curved inside because it is dead (drowned)

spider photo 1
(2 spider photo released under CC0 waiver)
spider photo 2


Spider in the photo:
status: dead
age: mature
sex: likely male
location: Red River Delta, Vietnam

Creates messy and non-adhesive webs.
Abdomen vibrates when it senses danger.

EDIT: likely a male, the female's abdomen are darker and bigger
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    $\begingroup$ Sorry to hear the news; I once had a "pet spider" in a corer of my apartment as well. Could you add some information on the size? There's nothing in the photo that gives a clue. Is the body 1 cm long? More? Less? Thanks, and Welcome to Stack Exchange! $\endgroup$
    – uhoh
    May 7 at 14:56
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    $\begingroup$ Sadly i lost the spider body 2 days after taking the picture (before posting this), but the distance between to blue lines in the paper are ~3/4cm $\endgroup$ May 8 at 4:27
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    $\begingroup$ edit previous: not ~3/4cm but ~3/4 of 1cm $\endgroup$ May 8 at 5:02

1 Answer 1

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This is indeed in the Family Pholcidae but you are unfortunately incorrect in thinking this is of the genus Pholcus

This appears to be a Short-bodied Cellar Spider (Physocyclus globosus) of the genus Physocyclus

Physocyclus globosus, sometimes known as the short-bodied cellar spider is a species of spider belonging to the family Pholcidae. This is a cosmopolitan species, found in caves and buildings throughout the warmer parts of the world. This is a small brown spider (body length around 6 mm), with a short, broad abdomen. A black line runs along the back of the carapace, continuing along most of the abdomen. The eight eyes are grouped close together on a raised hump on the face. Source: wikipedia.org

enter image description here

Image ref: inaturalist.org, Photo 26739006, (c) matthewkwan, some rights reserved (CC BY-ND), uploaded by matthewkwan

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    $\begingroup$ That specie have abdomen a bit too big compared to the cephalothorax, but the raised hump eyes are very interesting, i will upload a sideview photo $\endgroup$ May 8 at 4:32
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    $\begingroup$ The photo on Wikipedia show the eyes pair and the abdomen pattern very similar, i think you are correct $\endgroup$ May 8 at 8:28
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    $\begingroup$ @Stvkimension Thank you! $\endgroup$
    – Arrow
    May 8 at 11:39

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