Morphology Data of Pellonula leonensis
Identification keys
Abnormalities
Main Ref. Gourène, G. and G.G. Teugels, 1991
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs no special organs
Different appearance males alike females
Different colors males alike females
Remarks No sexual dimorphism seen (Ref. 48866).

Descriptive characteristics of juvenile and adult

Striking features none
Body shape lateral fusiform / normal
Cross section compressed
Dorsal head profile more or less straight
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth terminal
Type of scales cycloid scales
Diagnosis

Diagnosis: This species is characterised by the first prepelvic scute being as large as the following scutes lacking ascending arms, and located behind the pectoral-fin origins, and by the inward-curving premaxillary teeth (Ref. 2244, 2849, 81269, 81631). Scutes beginning behind base of first pectoral finray; lower jaw very slightly projecting, teeth at symphysis only slightly enlarged; premaxillary teeth small, curved inward, only the tips usually apparent, no strongly marked indentation at centre of jaw; lower gillrakers 20-35, long and equal to or longer than the corresponding gill filaments; silver stripe along flank (Ref. 188, 81269). It resembles Pellonula vorax, which has larger and straighter teeth, often pointing forward, and scutes before pectoral fin bases; absence of large canine teeth in upper jaw, within or behind normal outer premaxillary series, distinguishes it from Odaxothrissa; Microthrissa species are deep-bodied and have a much more slender maxilla (Ref. 188).

Description: Body slender to moderately deep, depth 17-30% of standard length (Ref. 188, 2244). Head length about 28% of standard length (Ref. 2244). Lower jaw very slightly projecting, but not prominent; premaxillary teeth relatively fine, curved inward, only the tips usually apparent (Ref. 188, 1880, 2849, 81269, 81631). A group of teeth on each side of the palatinum; 1-3 rows of teeth on the tongue; conical teeth relatively well developed on the dentary and premaxillary; premaxillary teeth are directed towards the inside of the mouth; width and length of supramaxillary respectively 14.3-21.9% and 52.6-67.0% of maxillary length, whose base bears 13-38 small conical teeth (Ref. 2244). First gill arch with 29-52 gill rakers, of which 20-35 on the lower limb and 9-16 on the upper limb, generally longer than the corresponding filaments on the first gill arch (Ref. 1989, 2244, 2756, 2849, 81269, 81631). Dorsal fin with 13-19 rays, the first dorsal-fin ray slightly in front or behind the insertion of the pelvic fin; anal fin with 15-22 rays; pectoral fin with 11-16 rays; pelvic fin with 7-9 rays; length of pectoral fin about half of the pectoral-pelvic fin distance; caudal fin deeply forked, with pointed lobes, and 19-20 rays (Ref. 1880, 2244, 2849, 3069, 81269, 81631, 120917). Cycloid scales; 36-45 scales on longitudinal line; 9-12 in transverse series (Ref. 367, 1880, 2241, 2756, 3069). First prepelvic scute of identical size to the following ones, lacking ascending arms and located behind the origin of the pectoral fins; 8-15 prepelvic scutes and 6-10 post-pelvic scutes (Ref. 2244, 2849, 81269, 81631, 120917). Caudal peduncle 1.3 times as long as deep (Ref. 1880). A total of 39-44 vertebrae: 19-24 abdominal vertebrae, 17-21 caudal vertebrae and 10-12 predorsal bones (Ref. 1989, 2244, 2756).

Colouration: Preserved specimens are very similar in colour to Pellonula vorax (Ref. 2849, 81269, 81631): variable ground colour from yellow-brown to yellow-gray; operculum, ventral region and flanks usually lighter (Ref. 2244). Silver stripe along flank (Ref. 188, 1880).

Ease of Identification

Meristic characteristics of Pellonula leonensis

Lateral Lines 1 Interrupted: No
Scales on lateral line 36 - 45
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 20 - 35
on upper limb 9 - 16
total 29 - 52
Vertebrae
preanal
total 39 - 44

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total 0 - 0
Soft-rays total 13 - 19
Adipose fin absent

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 15 - 22

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   11 - 16
Pelvics Attributes  more or less normal
Position    abdominal  beneath origin of D1
Spines     0
Soft-rays   7 - 9
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Luna, Susan M.
Modified by Boden, Gert
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