Bdellidae

Hernandes, Fabio A. & Feres, Reinaldo J. F., 2006, Tetrabdella neotropica (Acari: Bdellidae), a new genus and species from Brazil, Zootaxa 1135, pp. 57-68 : 58-59

Key to subfamilies and genera of Bdellidae of the world (modified from Atyeo 1960, 1963, Wallace & Mahon 1972, 1976).

1’ Hypostome with 2 pairs of ventral setae; genital tracheae well developed .................. 2

1’ Hypostome with six, seven or eleven pairs of prominent ventral setae; without well developed genital tracheae ............................................................................................ 7

2’ Trichobothriae present on tarsus IV; chelicera elongate, digits reduced needlelike ....... ........................................................................................... Spinibdellinae Grandjean...3

2’ Trichobothriae absent on tarsus IV; cheliceral bases normal to inflated, movable digit sickle shaped ................................................................................ Cytinae Grandjean...6

3 Trichobothriae present on tarsi III and IV ......... Tetrabdella Hernandes & Feres n. gen.

3’ Trichobothriae present on tibiae I and IV, tarsi III and IV ............................................ 4

4 Lateral propodosomal setae (ve) present; palpal tibiotarsus expanded distally (truncated) .............................................................................................................. Spinibdella Thor

4’ Lateral propodosomal setae (ve) absent; palpal tibiotarsus cylindrical, elongated ....... 5

5 Palp tibiotarsus with two long end setae ................................................... Biscirus Thor

5’ Palp tibiotarsus with only one end seta .................. Monotrichobdella Baker & Ballock

6 Integument soft, striated; unpaired eye between anterior bothridia; cheliceral digits massive ................................................................................................ Cyta von Heyden

6’ Integument heavily sclerotized, pitted; unpaired eye bsent; cheliceral digits not massive ..................................................................................................... Trachymolgus Berlese

7 Hypostome with eleven pairs of ventral setae................................................................. ................................... Polytrichinae (monogeneric)... Polytrichus van der Schyff et al.

7’ Hypostome with six or seven pairs of ventral setae ...................................................... 8

8 Trichobothria absent on tibia II ................................................ Bdellinae Grandjean... 9

8’ Trichobothria present on tibia II.................................... Odontoscirinae Grandjean... 10

9 Trichobothria present on tibia I, IV and tarsus III ....... Hexabdella van der Schyff et al.

9’ Trichobothria present on tibia I, IV, tarsus III and IV ............................ Bdella Latreille

10 Each chelicera with more than two setae, usually 8–20.............. Neomolgus Oudemans

10’ Each chelicera with one or two setae ......................................................................... 11

11 Lateral propodosomal setae (ve) present (four pairs of propodosomal setae) ................ ...................................................................................................... Octobdellodes Atyeo

11’ Lateral propodosomal setae (ve) absent (three pairs of propodosomal setae) ........... 12

12 Posterior trichobothria (sce) short, less than 1/4 the length of the median propodosomal setae, basal portion of median propodosomal setae modified and usually enlarged .....................................................................................................Thoribdella Grandjean

12’ Posterior trichobothria (sce) longer, more than 1/3 the length of the median propodosomal setae .................................................................................................................. 13

13 Cheliceral bases inflated; hypostome with prominent lateral lips; proximal cheliceral seta closer to distal seta than to base of chelicera .............................Odontoscirus Thor

13’ Cheliceral bases not inflated; hypostome without prominent lateral lips; usually one cheliceral seta, if two setae present, then the proximal seta is closer to the base of the chelicera than to distal seta.......................................................................................... 14

14 Anterior and posterior bothridia different, posterior pair goblet­shaped; posterior trichobothria short, appressed to surface of propodosoma; striae on midline of dorsum between posterior bothridia not longitudinal ......................................Hoploscirus Thor

14’ Anterior and posterior bothridia similar in shape; posterior bothridia longer, not appressed to surface of propodosoma; striae on midline of dorsum between posterior bothridia longitudinal .................................................................... Bdellodes Oudemans