CHARACTER 5: Male palpal bulbs. Number of keels, size and arrangement.
(terminology of male palpal bulb structures follows Bertani, 2000)
Two subequal keels PS, PI (Grammostola, Homoeomma, Paraphysa, Plesiopelma and related genera) = 1.
FIGURE: Homoeomma sp., Chile. Male palpal bulb, prolateral view.
Three unequal, almost parallel keels (one or two clearly wider) = 2.
FIGURE: Acanthoscurria geniculata (C. L. Koch, 1842), locality unknown. Male palpal bulb.
Two peripheric keels PS, A = 3.
FIGURE: Theraphosa blondi (Laterille, 1804), locality unknown. Male palpal bulb.
Three apical convergent keels PS, PI, A or PS, R, A (two keels clearly developed; Brachypelma, Pamphobeteus) = 6.
FIGURE: Brachypelma fossorium Valerio, 1980, Costa Rica, Guanacaste province. Male palpal bulb.
FIGURE: Sericopelma sp., Costa Rica, Guapiles. Male palpal bulb.
MALE PALPAL BULBS EXAMINED (with notes and figures):
Acanthoscurria geniculata (C. L. Koch, 1842), locality unknown.
Aenigmarachne sinapophysis Schmidt, 2005, Costa Rica (holotype).
Aphonopelma seemanni (Cambridge, 1897), Costa Rica, Monteverde.
Brachypelma auratum Schmidt, 1992, locality unknown.
Brachypelma emilia (White, 1856), locality unknown.
Brachypelma fossorium Valerio, 1980, Costa Rica, Guanacaste province.
Brachypelma klaasi (Schmidt & Krause, 1994), locality unknown.
Brachypelma smithi (Cambridge, 1897), locality unknown.
Citharacanthus longipes (Cambridge, 1897), Mexico, Chiapas.
Chromatopelma cyanopubescens (Strand, 1907), locality unknown.
Cyclosternum sp., Ecuador, Machala.
Cyriocosmus leetzi Vol, 1999, Venezuela.
Cyriocosmus perezmilesi Kaderka, 2007, Bolivia, San Buenaventura, Beni province (holotype).
Cyrtopholis sp., Cuba, near Playa Corinthia, Holguín province.
Euathlus vulpinus (Karsch, 1880), Chile.
Hemiercus sp., Venezuela, Puerto Cabello (Ischnocolinae).
Homoeomma sp., Chile.
Lasiodora cristatum (Mello-Leitao, 1923), locality unknown.
Megaphobema mesomelas (Cambridge, 1897), locality unknown.
Metriopelma sp., Venezuela, Isla Margarita.
Paraphysa sp., Chile.
Paraphysa riparia Schmidt 2007, Argentina (holotype, not belong to the genus Paraphysa).
Phormictopus auratus Ortiz & Bertani, 2005, Cuba.
Psalmopoeus reduncus (Karsch, 1880), locality unknown (Aviculariinae).
Sericopelma sp., Costa Rica, Guapiles.
Schizopelma sp., Mexico, El Suchil near Tecpan de Galleana, Guerrero.
Stichoplastoris sp., Costa Rica, Las Juntas, Guanacaste province.
Theraphosa blondi (Laterille, 1804), locality unknown.