Genus Aporcelaimellus
Heyns, 1965 emended
Photo Gallery-Haughton crater
Photo Gallery- Costa Rica
Aporcelaimidae.  Generally medium sized nemas 1.5 - 3.0 mm long.  Cuticle with thin cortical layer and frequently two thick layers which are especially prominent on the tails.  Minute transverse striae usually visible.  Lip region angular, set off by deep constriction.  Spear aperture occupying 2/5 or more of its length.  Guiding ring a muscular collar, rarely slightly sclerotized.  Esophagus enlarged by long, gradual expansion.  Dorsal esophageal gland nucleus well behind its orifice.  A thin cardiac disc present, followed by a conoid cardia.  Vulva a transverse slit usually with sclerotized labia.  Tail varying from hemispheroid to elongate conoid, rarely slightly digitate.  Males very rare and apparently not functional.

Type species:  Aporcelaimellus obscurus  (Thorne and Swanger, 1936)  Heyns, 1965.

(Description- Thorne, 1974)

The above diagnosis differs from that of Heyns:  Vulva a transverse slit, not pore like.  Cuticle often without two thick layers on tail.  Cardiac disc present, not absent.

Specimens from Costa Rica
    ?Aporcelaimellus sp. (1)

Species found:    at:
A. capitatus Konza Prairie, 9-Mile Prairie
A. clamus Konza Prairie
A. conoidus Konza Prairie, Homestead
A. dubius Konza Prairie
A. krygeri Konza Prairie, 9-Mile Prairie, Forensic Project
A. obscuroides Konza Prairie, 9-Mile Prairie, Homestead, Forensic projectdddddddd
A. obscurus Konza Prairie, 9-Mile Prairie, Haughton Crater
A. placus Konza Prairie, Forensic Project
A. porcus Konza Prairie
A. taylori Konza Prairie, 9-Mile Prairie