[Quoting Shuker's blog but beginning after the part where the Megalopedus was described and dismissed...]
Having said that, there is one final, but extremely significant twist in the tale (if not the tail!) of the tusked Megalopedus. Even though this is assuredly a make-believe mammal, its description is strangely reminiscent of a seemingly genuine yet wholly obscure, long-forgotten mystery beast that I serendipitously uncovered during my Megalopedus investigations. And the name of this overlooked oddity? The Sukotyro of Java.
Despite emanating from different sources, these plates' depictions were all clearly based upon the same, earlier, original illustration (see later here). And as they were reasonably priced, I duly purchased no less than three large, excellent plates (two in colour, one b/w) that included the instantly-recognisable sukotyro image (together with various well-known beasts). At a later date I also succeeded in purchasing a reasonably-priced 1804-dated version of Sibly's plate.
[Note; Following the usual convention, the names of Cryptids are properly capitalized-DD]
Quoting from Eberhart, Mysterious Creatures, 2002:
Large piglike Hoofed Mammal or Marsupial of Australasia.
Variant names: Gazeka, Monckton’s gazeka. Physical description: Dark skin with patterned markings. Length, 5 feet . Shoulder height , 3 feet 6 inches or greater. Long snout . Horselike tail. Even-toed (cloven) feet.
Distribution: Owen Stanley Range, Papua New Guinea.
Significant sightings: Ancient stone carvings depicting strange animals with long, trunklike snout s were first found in 1962 in the Ambun Valley.
Huge (rhinoceros-sized) excrement was found by the crew of the HMS Basilisk on the northeast Papuan coast in the 1870s. Dung from feral pigs, which are the largest Papuan ungulates, is less substantial.
Two native Papuans, Private Ogi and the village constable Oina, saw two large, porcine animals on Mount Albert Edward, Papua New Guinea, on May 10, 1906. Ogi tried to shoot one, but his hands shook, and he misfired.
[There is always the possibility that there is more than one thing being called a Devil Pig, and also that the Devil Pigs, Gazekas and Ambun sculpture creatures are each distinctively different Cryptids. The animals described as having cloven hooves are definitely Pigs]
(1) A feral Domestic pig (Sus scrofa var. domesticus) is rarely larger than 2 feet 6 inches at the shoulder.
(2) The Malayan tapir (Tapirus indicus) is odd-t oed and not found as far east as New Guinea.
(3) The Babirussa (Babyrousa babyrussa), found in Sulawesi, Indonesia, is not a close match.
[AMENDMENT: Papuan natives DO use Babirusa tusks, and make copies of them in stone and bone, but these are usually stated to be trade items by the authorities. I have notice of a firm assertion from a missionary to New Guinea who transmits the information that the natives say the Babirusa lives in their area and is the source of the valuable trade ivory]
(4) A Papuan occurrence of the Javan rhinoceros (Rhinoceros sondaicus) is unlikely. (5) A Long-nosed echidna (Zaglossus bruijni ), especially a newly hatched juvenile, might account for the Ambun sculptures.
(6) A surviving diprotodont marsupial, such as the tapirlike Palorchestes or the rhinoceros-like, nasal-horned Nototherium. Most of New Guinea’s native mammals are marsupials, making these large animals viable possibili ies for the Devil pig. The snouted Palorchestes seems particularly akin to the animal depicted in the Ambun stones. The last diprotodonts are thought to have died out in Australia between 18,000 and 6,000 years ago.
Sources: Alfred O. Walker, “The Rhinoceros in New Guinea,” Nature 11 (1875): 248, 268; Adolf Bernhard Meyer, “The Rhinoceros in New Guinea,” Nature 11 (1875): 268; Charles A. W. Monckt on, Some Experiences of a New Guinea Resident Magistrate (London: John Lane, 1920); Charles A. W. Monckt on, Last Days in New Guinea (London: John Lane, 1922), pp. 52–56; Charles A. W. Monckt on, New Guinea Recollections (London: John Lane, 1934), pp. 214–215; W. G. Hept ner, “Über das Java-Nashorn auf Neu-Guinea,” Zeitschrift für Säugetierkunde 25 (1960): 128–129; “A Remarkable St one Figure from the New Guinea Highlands,” Journal of the Polynesian Society 74 (1965): 78–79; Laurent Forge, “Un marsupial géant survit -il en Nouvelle Guinée?” Amazone, no. 2 (January 1983): 9–11; James I. Menzies, “Reflect ions on the Ambun Stones,” Science in New Guinea 13 (1987): 170–173.