The objectives of this study were to determine the temporal distribution of spinose
ear tick abundance within animal shelters, examine the spatial dispersion of adult and larval ticks within animal shelters, and examine the effects of climatic variables on tick abundance.
Antennae: with segment 1 and basal two thirds of segment II pale yellow, remainder of segment II plus entirety of segments III and IV black, segment I bearing 3 erect spinose
golden setae, all segments thickly covered with short, appressed pale setae intermixed with scattered short semi-erect golden-brown setae, lengths of segments I-IV-0.40, 1.45, 0.80, 0.40.
Fourth and fifth pereopods with less spinose
flexor surfaces of propodi; each merus unarmed or armed with one to four spines on lateral surface; ischium unarmed or armed with one or two spines on lateral surface.
Otobius ticks are called spinose
ear ticks because the nymph stage has a spiny covering and they typically feed in the folds of the external auditory canal.
It is important to note that spinose
ornamentation (or even granulation) is usually absent on type material of previously described taxa, not only due to shell exfoliation, but often because techniques used to clean the specimens from sediment have eradicated these important features.
The rostrum is well developed and is spinose
, at least on the dorsal surface.
: the margins contain sharp pointed spines such as for some Hollies.
Cattle in the African sub-Sahara and other semiarid regions of the world are attacked by the spinose
ear tick (Otobius megnini), which feeds deep in the ear canal of livestock and wild animals, causing a condition known as canker ear.
Predation on a tropical spinose
gastropod: the role of shell morphology.
Meso- and metanota were sparsely setose with both spinose
and hair-like sensilla.
Fulcrum 0.13mm long (straight line between ends); outer surface rugose, without spinules; anterior outer portion projecting against base of hook as relatively small spinose
shield; shield not touching hook when hook bent forward.
(86) M cirrus spinose
(87) M cirrus ovate (88) M single egg filament (89) La no anchors on oncomiracidium (90) La 16 marginal hooks on oncomiracidium (91) La haptor disk-shaped (92) N 16 marginal hooks in adult (93) N dactylogyrid hook shape (94) N anchors present in at least one stage of development