Question: Of what plant family is the species of mangrove tree on which the Parasesarma leptosoma cannot be found?

Context paragraphs:
Mangrove pitta: The mangrove pitta ("Pitta megarhyncha") is a species of passerine bird in the Pittidae family native to the eastern Indian Subcontinent and western Southeast Asia.  It is part of a superspecies where it is placed with the Indian pitta, the fairy pitta and the blue-winged pitta but has no recognized subspecies.  A colourful bird, it has a black head with brown crown, white throat, greenish upper parts, buff underparts and reddish vent area.  Its range extends from India to Malaysia and Indonesia.  It is found in mangrove and nipa palm forests where it feeds on crustaceans, mollusks and insects.  Its call, sometimes rendered as "wieuw-wieuw", is sung from a high perch on a mangrove tree.

Aratus pisonii: Aratus pisonii, commonly known as the mangrove tree crab, is a species of crab which lives in mangrove trees in tropical and subtropical parts of the Americas, from Florida to Brazil on the Atlantic coast, and from Nicaragua to Peru on the Pacific coast.  It feeds mostly on the leaves of the mangroves, but is an omnivore, and prefers animal matter when possible.  "A. pisonii" is the only species in the monotypic genus Aratus.  The specific epithet "pisonii" commemorates the Dutch naturalist Willem Piso who travelled in Brazil in 1638 with Georg Marggraf.

Ceriops tagal: Ceriops tagal (spurred mangrove, Indian mangrove, Afrikaans: "Indiese wortelboom" , Zulu: "Isinkaha" ) is a mangrove tree species in the family Rhizophoraceae.  It is a protected tree in South Africa.  The specific epithet "tagal " is a plant name from the Tagalog language.

Heritiera fomes: Heritiera fomes is a species of mangrove tree in the family Malvaceae.  Its common names include sunder, sundri, jekanazo and pinlekanazo.  It is the dominant mangrove tree species of the Sundarbans of Bangladesh and India, and comprises about 70% of the trees in the area.  "H. fomes" is a major timber-producing tree.  It is threatened by over-harvesting, water diversions in the Ganges Basin, fluctuations in salinity due to upstream and coastal development and top dying disease.  The International Union for Conservation of Nature has assessed it as being "endangered".

Excoecaria agallocha: Excoecaria agallocha, a mangrove species, belongs to the genus "Excoecaria" of the family Euphorbiaceae.  It is common in mangrove swamps from Bangladesh, India in the northwest to Australia in the southeast, within Australia, it thrives from northern New South Wales along the northern coastline around to Western Australia.  Given such a wide range, it is understandable that the species has many common names including: "Thillai", milky mangrove, blind-your-eye mangrove and river poison tree.  Most of the names refer to its poisonous or blinding nature.

Avicennia marina: Avicennia marina, commonly known as grey mangrove or white mangrove, is a species of mangrove tree classified in the plant family Acanthaceae (formerly in the Verbenaceae or Avicenniaceae).  As with other mangroves, it occurs in the intertidal zones of estuarine areas.

Parasesarma leptosoma: Parasesarma leptosoma (Hilgendorf, 1869), aka the arboreal crab, is an arboreal, leaf-eating mangrove crab, found on "Rhizophora mucronata" and "Bruguiera gymnorhiza", but not on "Avicennia marina", and occupying an ecological niche similar to that of another sesarmid, "Aratus pisonii", from the Americas.

Mangrove hummingbird: The mangrove hummingbird ("Amazilia boucardi") is a species of hummingbird in the family Trochilidae.  It is found only in Costa Rica.  Its natural habitat is subtropical or tropical mangrove forests.  It is threatened by habitat loss.  The mangrove hummingbird feeds primarily on nectar from the flowers of the tea mangrove "Pelliciera rhizophorae".  Mangrove hummingbirds are occasionally seen in adjacent non-mangrove habitats.  Nesting for these birds has been recorded during the months of October through February.  The mangrove hummingbird is on average approximately 10 cm long.

Top dying disease: Top dying disease is a disease that affects "Heritiera fomes", a species of mangrove tree known as "sundri", a characteristic tree of the estuarine complex of the Ganges–Brahmaputra Delta in Bangladesh and West Bengal.  Although an increase in certain trace elements in the sediment deposited where these trees grow may be a factor in the incidence of the disease, its cause has not been fully established.

Mangrove gerygone: The mangrove gerygone ("Gerygone levigaster") is a species of bird in the Australian warbler family Acanthizidae.  The species is also known as the mangrove warbler.  The species is thought to form a superspecies with the closely related fan-tailed gerygone of Melanesia and the Australian western gerygone.  There are three subspecies of mangrove gerygone, "G. l. pallida", found in southern New Guinea, the nominate race "G. l. levigaster", which is found from coastal Western Australia to coastal north Queensland, and "G. l. cantator", which is found from coastal Queensland to New South Wales.  The species is uncommon in New Guinea and has suffered some declines due to mangrove clearances but is not considered threatened by the IUCN.

Supporting paragraphs: Parasesarma leptosoma Avicennia marina
Answer: Acanthaceae