preanal


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pre·a·nal

(prē-ā'năl),
Anterior to the anus.

preanal

[prē·ā′nəl]
located anterior to the anus.

preanal

(prē-ā′năl) [″ + anus, anus]
In front of the anus.
References in periodicals archive ?
somesi has 24 anal cirri which are alternately long and short and 2 asetigerous preanal segments.
Caudal papillae variable in number with 10 preanal and 5 postanal pairs, sub-ventral, second postanal pair (from cloaca) slightly more lateral.
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.
number of preanal scales, anterior extent of circumorbital series, and size of central mesoptychial scales anterior to guiar fold) and color pattern (e.
Redescriptions of Amblyseius meghriensis Arutunjan and Typhlodromus haiastanius (Aruntujan) with discussion on using preanal pores as a character in the subgenus Anthoseius (Mesostigmata, Phytoseiidae).
Therefore, it was not surprising to find that from 2 DAH onwards, the trunk length growth was almost isometric, similar to the preanal and postanal heights, indicating a constant and proportional growth of this part of the body in relation to total length.
7 Palpi compressed with acute transverse ridges dorsally and laterally, with normal legs, adanal and accessory plates but without preanal plate .
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.
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).