Puffballs are fungi, so named because clouds of brown dust-like spores are emitted when the mature fruitbody bursts or is impacted. Puffballs are in the division Basidiomycota and encompass several genera, including Calvatia, Calbovista and Lycoperdon. True puffballs do not have a visible stalk or stem. The puffballs were previously treated as a taxonomic group called the Gasteromycetes or Gasteromycetidae, but they are now known to be a polyphyletic assemblage.
Pachyderma or pachydermia, is the thickening of skin like that of a pachyderm. It occurs in the condition Pachydermoperiostosis; an X-linked genetic disorder.
The stream catfishes comprise the family Akysidae of catfishes.
Akysis is the largest genus of catfishes of the family Akysidae.
Plectrohyla pachyderma is a species of frog in the family Hylidae. It is endemic to Mexico. Its natural habitats are subtropical or tropical moist montane forests and rivers. It is threatened by habitat loss.
Acrochordonichthys chamaeleon is a species of catfish of the family Akysidae.
Acrochordonichthys falcifer is a species of catfish of the family Akysidae. It' is known only from the Kinabatangan and Segama River drainages, and possibly from the Kayan River drainage, in north-eastern Borneo. A. falcifer falls into the second species group of its genus—the A. rugosus section. It includes A. falcifer, A. chamaeleon, A. pachyderma, and A. rugosus.
Acrochordonichthys guttatus is a species of catfish of the family Akysidae. It is endemic to Borneo and only known from the Barito River drainage. A detailed discussion of this species's relationship with the other members of its genus can be found on Acrochordonichthys.
Acrochordonichthys gyrinus, the Falcate chameleon catfish, is a species of catfish of the family Akysidae. A detailed discussion of this species's relationship with the other members of its genus can be found on Acrochordonichthys.
Acrochordonichthys ischnosoma is a species of catfish of the family Akysidae. A detailed discussion of this species's relationship with the other members of its genus can be found on Acrochordonichthys. A. ischnosoma is known from the Citarum River drainage in western Java and the Musi River drainage in southern Sumatra.
Acrochordonichthys mahakamensis is a species of catfish of the family Akysidae. A detailed discussion of this species's relationship with the other members of its genus can be found on Acrochordonichthys.
Acrochordonichthys rugosus is a species of catfish of the family Akysidae. It inhabits clear, swiftly flowing forested streams of Thailand, Malaysia and Indonesia. A detailed discussion of this species's relationship with the other members of its genus can be found on Acrochordonichthys.
Acrochordonichthys septentrionalis, the Maeklong chameleon catfish, is a species of catfish of the family Akysidae. A detailed discussion of this species's relationship with the other members of its genus can be found on Acrochordonichthys.
Acrochordonichthys strigosus is a species of catfish of the family Akysidae. It is only known from the Indonesian part of Borneo. A detailed discussion of this species's relationship with the other members of its genus can be found on Acrochordonichthys.
Onchidella pachyderma is a species of air-breathing sea slug, a shell-less marine pulmonate gastropod mollusk in the family Onchidiidae.
Distocercospora is a genus of three species of plant-pathogenic fungi in the family Mycosphaerellaceae. The genus was circumscribed in 1988 with D. pachyderma as the type species.
Stenella iteae is a species of anamorphic fungi.
Acanthascus is a genus sponges in the family Rossellidae. Species include:
