Morphology Data of Phalloceros anisophallos
Identification keys
Main Ref. Lucinda, P.H.F., 2008
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth

Autapomorphically diagnosed by having hook on left half of gonopodial appendix near its tip, located approximately from distal quarter to the distal third of length of gonopodial appendix, and spot on median region of flanks elongate, forming a vertical bar reaching dorsal and ventral profiles. Differs from its congeners but Phalloceros megapolos,

Phalloceros spiloura, Phalloceros malabarbai, Phalloceros alessandrae, Phalloceros buckupi, Phalloceros uai, Phalloceros lucenorum, Phalloceros pellos, and Phalloceros reisi by the female urogenital papilla curved to the right, located laterally (vs. slightly left turned and with a lateral ramus or straight located along midventral line); and border of the anal aperture in contact with the first anal-fin ray or very close to it (vs. separated from first anal-fin ray by the female urogenital papilla). Can be differentiated from its congeners except Phalloceros spiloura, Phalloceros uai, Phalloceros lucenorum, Phalloceros pellos, and Phalloceros reisi by the absence of the right hook and presence of the left one (vs. absence or presence of left and right hooks), and gonopodial appendix asymmetrical; its halves different from each other; right half wider than left one (vs. gonopodial appendix symmetrical; its halves similar to each other). Can be separated from Phalloceros spiloura by the absence of a caudal peduncle spot (vs. presence of caudal peduncle spot); from Phalloceros uai by the presence of a wide and square-shaped lateral spot in large specimens (vs. absence of such spot); from Phalloceros lucenorum by rectangular tip of hook on left half of gonopodial appendix (vs. rounded tip); from Phalloceros lucenorum, Phalloceros pellos, and Phalloceros reisi by the lateral spot in adult females very narrow, forming a vertically elongated bar covering up to the length corresponding to two scales length in horizontal direction and 2-4 scales in vertical direction (vs. lateral spot in adult females absent, small, or elliptical to roundish, but never forming a vertical bar) (Ref. 76852).

Description: Pectoral fin with 5-7 branched rays; longitudinal series of scales 28-29; transverse series of scales 6-7 (Ref. 76852).

Ease of Identification

Meristic characteristics of Phalloceros anisophallos

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle 16 - 16
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 32 - 32


Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Spines total
Soft-rays total 7 - 8
Adipose fin absent

Caudal fin

Attributes more or less truncate

Anal fin(s)

Fins number
Spines total
Soft-rays total 9 - 11

Paired fins

Pectoral Attributes  
Pelvics Attributes  
Position    abdominal  behind origin of D1
Soft-rays   5 - 5
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Torres, Armi G.
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cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17