Males differ from similar species (T. umerus, T. rufa, T. hawii) in:
- Ratio of outer apical to inner apical spine in P5 is 2:3
- Seta VII is shorter than seta VI in caudal rami
- 3 pores on dorsal surface on genital segment
Congo, Argentina, Brazil South, Chile, Peru, Venezuela, Florida, Bermuda, Sargasso Sea, Greenland Sea, Norwegian Sea, North Sea, Mediterranean Sea, Suez Canal, Red Sea, Arabian Sea, China Sea, Sea of Japan, Bering Sea, Laptev Sea, Gulf of Alaska, Canada Arctic Basin. For Böttger-Schnack (1999) many records of this species in the world ocean are cited, but are doubtful, because they did not include figures or a description that positively identified the species.
Meso-bathypelagic. Epipelagic in the Gulf of Naples.
Female:
Proportional lengths (%) of abdominal segments and caudal rami 10.2:54.9:6.4:5.7:11.0:11.7=100. A1 6-segmented. Caudal rami about 1.7 times as long as wide. Anal somite 1.2 times wider than long, about equal in length to the caudal rami.
Male:
A1 4-segmented, relative lengths (%) of segments of A1 measured along posterior non-setigerous margin 8.8:23.5:39.4:28.2=100. P6 represented by posterolateral flap closing off genital aperture on either side, covered by pattern of spinules.
