Neothrombiidae, Feider, 1959

Kohansal, Mahnaz, Noei, Javad, Ramroodi, Sara & Rakhshani, Ehsan, 2024, Description of Neosilphitrombium rhipicephalum sp. nov. (Prostigmata: Neothrombiidae) ectoparasite on hard ticks from Iran, Zootaxa 5481 (3), pp. 326-340 : 338

Key to world genera of larval Neothrombiidae [updated after Noei (2020)]

1. fn Cx I–III 1-1-1, without solenidion on Ge III......................................... Thaitrombidium Fain, 1998

- fn Cx I–III otherwise, with one solenidion on Ge III.......................................................... 2

2. Eyes absent.......................................................................................... 3

- Eyes present......................................................................................... 4

3. Two setae on scutellum, sensillary setae normal................... Ceuthothrombium Robaux, Webb and Campbell, 1976

- Four setae on scutellum, sensillary setae clavate......................................... Wondeclia Southcott, 1987

4. fn Cx I–III 2-1-1...................................................................................... 5

- fn Cx I–III otherwise.................................................................................. 8

5. Tarsal claws 2-2-2 or 2-2-3, Fe II with 5 normal setae, Ti I with five or six setae, scutellum with more than 10 setae....... 6

- Tarsal claws 3-3-3, Fe II with 4 normal setae, Ti I with seven setae, scutellum with two setae......................... 7

6. Tarsal claws 2-2-2, Ge II with three normal setae, Ti I with five setae.................... Giftitrombium Haitlinger, 2007

- Tarsal claws 2-2-3, Ge II with two normal setae, Ti I with six setae........................................................................................................ Solistrus Saboori, Ueckermann and van Harten, 2008

7. Tarsus III with deformed posterior claw, Ge I with two and Ge II & III each with one solenidion, palp femur with one seta, palp tibial claw bifid................................................................... Razgthrombium Noei, 2020

- Tarsus III without deformed posterior claw, Ge I with 10 and Ge II & III each with two solenidia, palp femur without seta, palp tibial claw entire................................................................ Nanotrombium Zhang, 1994

8. fn Cx I–III 2-2-1...................................................................................... 9

- fn Cx I–III otherwise................................................................................. 13

9. Scutellum striated and with six setae............................................. Neothrombium Oudemans, 1909

- Scutellum not striated and with two or four setae........................................................... 10

10. Scutellum with four setae, palp femur with one seta......................................................... 11

- Scutellum with two setae, palp femur with or without seta.................................................... 12

11. Ge II & III each with three normal setae, sensillary setae anterior to PL setae............... Acritrombium Southcott, 1986

- Ge II & III each with two normal setae, sensillary setae posterior to PL setae................ Machilitrombium Fain, 1994

12. Ge I with one solenidion, palp femur with one seta.............................. Opiliotrombium Zhang and Fan, 2005

- Ge I with two solenidia, palp femur without seta........................................ Southcottella Saboori, 2002

13. Without bilobed setae on Cx I–III, fn Cx 2-4-1 or 4-6-7...................................................... 14

- With bilobed setae on Cx I–III, fn Cx otherwise............................................................ 15

14. Idiosoma not hypertrichotus, fn Cx 2-4-1, scutellum with 8–14 setae, Ge I with four solenidia, palpal femur without seta.................................................................................. Dasitrombium Zhang, 1994

- Idiosoma hypertrichotus, fn Cx 4-6-7, scutellum with 6–9 setae, Ge I with two solenidia, palpal femur with one seta..................................................................................... Paputrombidium Fain, 1992b

15. Scutellum with two or more barbed setae, scutum with two bilobed setae (AL)............. Neosilphitrombium Fain, 1992a

- Scutellum with two bilobed setae, scutum with four bilobed setae (AL, PL)...................................... 16

16. Fe I with six normal setae.......................................................... Silphitrombium Fain, 1992a

- Fe I with four normal setae.................................................... Vagatotrombium Haitlinger, 2001