separate), the number of tubercles on the penultimate abdominal tergum
(in Vietnura 3 tubercles: 2 (De + DL) and (Di + Di), in Intricatonura gen.
These plates include a median dorsal carina, and on each side one to two scuta and a tergum
Chan et al (2007a, b) have demonstrated the utility of this multivariate technique to discriminate the scutum and tergum
parameters among barnacle species.
Abdominal first tergum
without spicules, second to eighth terga and all sterna and pleura mostly densely covered with tiny spicules, terminal segment rounded.
75 times as long as wide, basal margin widest; sclerites of tergum
6 small, about 0.
dirae ferro et compagibus artis claudentur belli portae: Furor impius intus, saeva sedens super arma, et centum victus aenis post tergum
nodis, fremet horridus ore cruento.
with carinal margin protuberant in upper half to third, spurlength a tenth shorter than width, distance from basiscutal angle less than own width (Gordon, 1970, Biccard, 2012), the classification of this species as follows:
5 mm long; females with short ovipositor; metasomal tergum
weakly sclerotized; antenna short with 10 to 28 segments; ovipositor sheath or hypopygium in females often modified; a single, large median cell in the fore wing in most species; smooth scutellar sulcus present; cross vein cu-a absent in the hind wing and occipital carina present (at least laterally) (Stary 1970; Achterberg 1997).
Yna ar ben y gramen, mae yna ddwy blat fechan arall, a'r ddwy hefo'i gilydd yn gwneud caead ar ben y gragen long - y tergum
a'r scutum ydi'r enwau gwyddonol ar y rhain.
Apical margin of tergum
1 distinctly raised; apical margin of tertige 2 and 3 forming a conspicuously raised, thin lamella, which is separated from the segment by a deep groove.
Lateral margins of sixth abdominal tergum
well-defined and separated ventrally by a wide membranous area; spiracles near margin of tergum
Discussion: Species in this genus are distinguished based on characteristics of pronotum punctation and maculation, connexiva coloration, and characters related to male genitalia and medial lobes of the 8th abdominal tergum