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Labridae (wrasses)

Labridae (wrasses). Larval morphological characteristics - laterally compressed - gut straight and coils later - myomeres 23 – 28 (mostly 25) - small mouth - no head spination - very little pigment. Labridae (wrasses). Species level identification is difficult – WHY?.

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Labridae (wrasses)

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  1. Labridae (wrasses) Larval morphological characteristics - laterally compressed - gut straight and coils later - myomeres 23 – 28 (mostly 25) - small mouth - no head spination - very little pigment

  2. Labridae (wrasses) Species level identification is difficult – WHY? • high species number (35 genera, 300 species  Indo-Pacific) • meristic characters overlap • Celebes Sea Labrid Types • General Body Shape • Pigment Patterns Location: Celebes Sea Date: August 2007 Gear: Bongo (521 um)

  3. Labridae Type A probably Halichoeres sp. • eyes slightly narrow, choroid tissue • long, pointed snout • gut coiled in postflexion • no pigment throughout larval stage 6.0 mm Myomeres: 23 D: IX, 13 A: III, 13 P1: 12 C: 12 8.6 mm

  4. Labridae Type B probably another Thalassoma sp.(Fahay) • general body shape similar with Type A • dorsal spines form early • pigments on anterior dorsal fin membrane 3.9 mm • head larger than other labrids Myomeres: 25 D: VIII, 12 A: III, 11 P1: 14 C: 12 6.0 mm

  5. Labridae Type C Probably Cirrhilabrus sp. 6.0 mm • heavy pigment on dorsal portion of gut • pigment enlarges as larvae mature 3.9 mm 7.4 mm Myomeres: 25 D: XI, 9 A: III, 9 P1: 14 C: 13

  6. Labridae Type D Probably Cheilinus sp. 6.0 mm • body deep • no pigmentation • early forming pectoral fin 4.6 mm 3.9 mm 7.4 mm Myomeres: 25 D: IX, 10 A: III, 9 P1: 14 C: 13 6.2 mm

  7. Labridae Type E Probably Xyrichthys sp. 6.0 mm 9.2 mm • body elongated, very laterally compressed • head small and pointed 11.2 mm Myomeres: 25 D: IX, 12 A: III, 11 P1: 12 C: 14 • mouth very small • eye elliptical, choroid tissue • first two dorsal spines originate in nape • gut initially straight, coils after flexion

  8. 6.6 mm 7.0 mm Scaridae (parrot fishes) • body laterally compressed, ovoid in cross section • head small, mouth small, snout round 3.9 mm • gut straight initially, coiled at flexion • gut rugose at posterior end • eye elliptical, choroid tissue • pigment series along base of anal fin to caudal, dorsal gut Myomeres: 25 D: IX, 10 A: III, 9 P1: 14 C: 14 11.2 mm

  9. 6.6 mm 7.0 mm Scaridae (parrot fishes) 3.9 mm • Gobiidae  same myomere count • but, no rugose gut, very conspicuous bladder, eyes round • Myctophidae  with rugose gut • but, myomeres >30, no series of pigment 11.2 mm

  10. Coryphaenidae (dolphinfishes) Coryphaena hippurus • body elongated, head moderately blunt • heavy pigmentation 3.9 mm 3.8 mm 11.2 mm Myomeres: 63 D: 23 A: 23 P1: 13 C: 14 6.2 mm

  11. Coryphaenidae (dolphinfishes) Coryphaena hippurus Coryphaena equiselis - no barred pigmentation - no pigment on pelvic fin (older larvae) 3.9 mm 3.8 mm Rachycentridae - gut more heavily pigmented than body - head slightly elongated 11.2 mm 6.2 mm

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