Ammotrechidae Roewer 1934
of the family Ammotrechidae.
Ammotrechula pilosa Muma
from California, USA (photo by Warren E. Savary)
Members of the family
Ammotrechidae are known from North America, Central America, South America, and
the Caribbean Islands. The 83 living species and single known fossil species
are distributed among 22 genera, which in turn are distributed among five
subfamilies. Ammotrecha (9 species), Ammotrechella (13 species),
Ammotrechesta (5 species), Ammotrechinus (1 species),
Ammotrechona (1 species), Ammotrechula (12 species), Antillotrecha
(2 species), Campostrecha (1 species), Dasycleobis (1 species),
Neocleobis (1 species), and Pseudocleobis (20 species), are placed
together in the subfamily Ammotrechinae, whose members are broadly distributed through North, Central,
and South America. The monotypic genus Mortola of Argentina is placed by
itself in the subfamily Mortolinae. Nothopuga (2 species, both from Argentina) is the sole
genus in the Nothopuginae.
The four Argentinian species comprising the genus Oltacola are assigned
to the subfamily Oltacolinae.
Branchia (3 species) Chinchippus (1 species) Innesa (1
species) Procleobis (1 species) Saronomus (1 species) are placed
in the Saronominae. Three
living species [Chileotrecha
and the sole known fossil species [Happlodontus
proterus], are not presently assigned to any of the recognized
Male ammotrechids have a fixed, non-rotatable
membranous flagellum attached to the mesal face of each chelicera.
Mesal view of chelicera of male Ammotrechula catalinae Muma
from Sonora, Mexico, showing
flagellum (photo by Warren E, Savary).
Mesal view of chelicera of male Procleobis patagonicus Maury 1977
(illustration from Maury 1977)
Mesal view of chelicera of male
Branchia potens Muma 1951,
from Baja California, Mexico (photo by Warren
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