Tydeus cruciatus Koch

André, Henri M., 2005, In search of the true Tydeus (Acari, Tydeidae), Journal of Natural History 39 (13), pp. 975-1001: 990-991

publication ID

http://doi.org/ 10.1080/00222930400002838

persistent identifier

http://treatment.plazi.org/id/03EB879B-FFA0-FFF0-FE3B-6C0C812DFEDB

treatment provided by

Felipe

scientific name

Tydeus cruciatus Koch
status

 

Tydeus cruciatus Koch  

( Figures 2B View Figure 2 , 3B View Figure 3 , 4B View Figure 4 , 5B View Figure 5 , 6D View Figure 6 )

The species was also listed as an ‘‘ancient species’’ not identifiable by Kaźmierski (1998). The single illustration of the species was given by Koch (1838). Although they both provided further description of the species, neither Oudemans (1929b), nor Thor (1931, 1933) published additional figures.

Leg chaetotaxy

I(8-4-3-3-1), II(6-2-2-3-0), III(5-2-1-2-1), and IV(5-2-1-1-0). Eupathidia on tarsus I: ft 99, (tc) and (p). Solenidiotaxy: 2.

Genital chaetotaxy

(0,?-6-4). Extended striation pattern ( Figure 2B View Figure 2 ). Palp and chelicera apparently similar to those of croceus   .

The single female in Oudemans’ collection exhibits the typical Tydeus   striation pattern defined by Baker (1965). Striation unique in having circular striae around (vi) similar to those usually observed around the trichobothridia ( Figure 3B View Figure 3 ). Dorsal setae smooth ( Figure 5B View Figure 5 ). The species is probably small as the idiosoma length was only 235 M m, but this measure is only indicative due to the state of the specimen. The total length published by Oudemans (1929b, p 477) was 247 M m. Koch (1838) had already indicated that the species was exceedingly small (‘‘ungemein klein’’). NS(vi)522, NS(ep)519.

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Acari

Family

Tydeidae

Genus

Tydeus