Ricinulei

Male Cryptocellus abaporu, from Bonaldo & Pinto-da-Rocha (2003). Scale bar = 1 mm.

Belongs within: Arachnida.

The Ricinulei are a group of arachnids found primarily in tropical rainforests. Members of this group are characterised by a pre-carapaceal structure (the cucullus), modified pedipalps and a characteristic mode of sperm transfer facilitated by an elaborate copulatory apparatus on the third leg of the male (Harvey 2002).

<==Ricinulei
    |  i. s.: Terpsicroton S07
    |--Palaeoricinulei H02
    |    |--Poliochera S07 [Poliocheridae H02]
    |    |    `--P. punctulata Scudder 1886 F04
    |    `--Curculioides [Curculioididae] H02
    |         `--C. ansticii Buckland 1837 H02
    `--Ricinoididae [Cryptostemmatidae, Cryptostemmatoidae, Neoricinulei] B-TP08
         |--Ricinoides Ewing 1929 B-TP08
         |    |--R. afzelii H95
         |    `--R. atewa SF15
         |--Pseudocellus Platnick 1980 B-TP08
         |    |--P. palaezi H95
         |    |--P. paradoxus H95
         |    `--P. pearsei (Chamberlin & Ivie 1938) GE02
         |--Cryptostemma H02
         |    |--C. crassipalpe Hansen & Sørensen 1904 HS04
         |    `--C. westermannii Guérin-Méneville 1838 H02
         `--Cryptocellus Westwood 1874 B-TP08
              |--*C. foedus Westwood 1874 G-TP08
              |--C. abaporu Bonaldo & Pinto-da-Rocha 2003 BP-R03
              |--C. boneti GE02
              |--C. centralis Fage 1921 B-TP08
              |--C. glenoides Cooke & Shadab 1973 B-TP08
              |--C. lampeli H95
              |--C. magnus Ewing 1929 [incl. C. manni Ewing 1929] B-TP08
              |--C. narino Platnick & Paz 1979 B-TP08
              |--C. peckorum Platnick & Shadab 1977 B-TP08
              |--C. platnicki Botero-Trujillo & Pérez 2008 B-TP08
              `--C. simonis BP-R03

*Type species of generic name indicated

REFERENCES

[BP-R03] Bonaldo, A. B., & R. Pinto-da-Rocha. 2003. On a new species of Cryptocellus from the Brazilian Amazon (Arachnida, Ricinulei). Revista Ibérica de Aracnología 7: 103–108.

[B-TP08] Botero-Trujillo, R., & G. A. Pérez. 2008. A new species of Cryptocellus (Arachnida, Ricinulei) from northwestern Colombia. Journal of Arachnology 36 (2): 468–471.

[F04] Fritsch, A. 1904. Palaeozoische Arachniden. Selestverlag: Prague.

[GE02] Giribet, G., G. D. Edgecombe, W. C. Wheeler & C. Babbitt. 2002. Phylogeny and systematic position of Opiliones: a combined analysis of chelicerate relationships using morphological and molecular data. Cladistics 18: 5–70.

[HS04] Hansen, H. J., & W. Sørensen. 1904. On Two Orders of Arachnida: Opiliones, especially the suborder Cyphophthalmi, and Ricinulei, namely the family Cryptostemmatoidae. Cambridge University Press: Cambridge.

[H02] Harvey, M. S. 2002. The neglected cousins: what do we know about the smaller arachnid orders? Journal of Arachnology 30 (2): 357–372.

[H95] Humphreys, W. F. 1995. Chorion surface features of chelicerate eggs. Records of the Western Australian Museum Supplement 52: 171–181.

[SF15] Sharma, P. P., R. Fernández, L. A. Esposito, E. González-Santillán & L. Monod. 2015. Phylogenomic resolution of scorpions reveals multilevel discordance with morphological phylogenetic signal. Proceedings of the Royal Society of London Series B—Biological Sciences 282: 20142953.

[S07] Shultz, J. W. 2007. A phylogenetic analysis of the arachnid orders based on morphological characters. Zoological Journal of the Linnean Society 150 (2): 221–265.