Hexamermis albicans, a parasite of orthopterans, dermapterans, coleopterans, dipterans, hymenopterans and lepidopterans, is separated by the arrangement of the genital papillae: 4-8 preanal
and 5-9 postanal.
somesi has 24 anal cirri which are alternately long and short and 2 asetigerous preanal
Larvae are moderately deep-bodied and robust through much of their development, although they are initially somewhat elongate, have a rounded head and short snout, a short preanal
length, and large, and slightly oval to round eyes (Fig.
Nevertheless, this study identified intriguing geographical differences in morphology (e.g., number of preanal
scales, anterior extent of circumorbital series, and size of central mesoptychial scales anterior to guiar fold) and color pattern (e.g., contrast between pale stripes and dark fields).
Caudal end with 12 pairs of (sessile) anal papillae, arranged as 7 preanal
, 1 adnal and 4 postanal.
The following measurements were recorded to the nearest 0.1 mm: standard length (SL--measurement from the tip of the snout to the tip of the notochord or posterior tip of hypural plates); head length (HL --measurement from tip of snout to end of operculum); eye diameter (measurement taken along widest part of eye); snout length (measurement from tip of snout to anterior edge of eye); body depth (vertical measurement taken at the pectoral-fin base); body depth at the anus (vertical measurement taken at the anus); snout to anus length (preanal
length); snout to anal-fin origin; and snout to dorsal-fin origin.
7 Palpi compressed with acute transverse ridges dorsally and laterally, with normal legs, adanal and accessory plates but without preanal
plate .......................................Boophilus Curtice (1891).
Papilla formula: 2/3+1+3: two pairs preanal
, three pairs ad-postanal, one pair at mid-tail and three pairs subterminal.
The following sets of dimensions were taken: 1) Standard length: from tip of snout to base of caudal fin; 2) Head length: from tip of snout to posterior margin of opercle; 3) Snout length: from tip of snout to anterior margin of orbit; 4) Predorsal distance: from tip of snout to anterior base of first dorsal ray; 5) Preanal
distance: from tip of snout to base of anal fin insertion; 6) Length of base of adipose fin; 7) Caudal peduncle depth: shorter distance from caudal peduncle; 8) Head depth: taken at occipital region; 9) Body depth: at dorsal fin origin; 10) Orbital diameter: taken horizontally; 11) Interorbital width: taken between eyes; 12) Mouth width: width of lower jaw.
Five new species of genus Astyanax Baird & Girard, 1854 from Rio Iguacu, Parana, Brazil (Ostariophysi, Characiformes, Characidae)/ Cinco novas especies do genero Astyanax Baird & Girard, 1854 do Rio Iguacu, Parana, Brasil (Ostariophysi, Characiformes, Characidae)
We found that the number cephalic and preanal
vertebrae were the same in all larvae phases and there was a reduction in the pos-anal region number in the posflexion phase (Table 1).