Calliopum aeneum

Semelbauer, Marek & Kozánek, Milan, 2012, Morphology of preimaginal stages of Lauxania and Calliopum (Diptera: Lauxaniidae), Zootaxa 3346, pp. 1-28 : 24

Calliopum aeneum

Egg. Length 0.66–0.72 mm. Relatively thin. Ventral part of egg with simple longitudinal ridges. Dorsal part with deep longitudinal channels ( Figs 35–37 ).

First larval instar. Length 0.97–1.96 mm ( Figs 47, 48 ). Length of cephaloskeleton: 0.19–0.21 mm.

Second larval instar ( Figs 61, 62 ). Length 1.90–3.33 mm. First row of cirri coalescing towards the mouths. Length of cephaloskeleton: 0.32–0.36 mm.

Third larval instar ( Figs 83–89 ). Length 2.6–4.80 mm. Anterior spiracle with 7 papillae ( Fig. 76 ). Dorsal side of abdominal segments completely villous. Ventral side with small smooth area surrounding the posterior creeping welts. Ventral posterior creeping welts partly spinous. Length of cephaloskeleton 0.54–0.61 mm.

Puparium ( Figs 118, 119). The only acquired puparium was 5.0 mm long. Processes of anal division markedly longer than in other species. Crevices create on dorsal surface small, medial ovals, as in L. minor . Puparium markedly dorsoventrally flattened, but this may not be a stable character.

Figures

FIGURES 35 – 46. Eggs of Calliopum species, columns from left to right: whole egg oriented with posterior end up; posterior tubercle; mycropyle. 35 – 37. C. aeneum. 35. Left, dorsal view; right, ventral view. 38 – 40. C. elisae. 38. Dorsal view. 41 – 43. C. splendidium. 41. Dorsal view. 44 – 46. C. simillimum. 44. Lateral view.

FIGURES 47 – 54. Calliopum species, first instar, with left column, pseudocephalon, ventral view (except 49, lateral view); right column, details of mouth hook, first row of cirri and ventral organ. 47 – 48. C. aeneum. 49 – 50. C. elisae. 51 – 52. C. splendidum. 53 – 54. C. simillimum. A, antenna; C, cirri; C 1, first row of cirri; LL, labial lobe; LS, labial sensilla; MH, mouth hook; MP, maxillary palpus; VO, ventral organ.

FIGURES 61 – 68. Calliopum species, second instar. 61 – 62. C. aeneum. 61. Pseudocephalon, ventral view. 62. Detail of mouth hooks, posterior view. 63 – 64. C. elisae. 63. Pseudocephalon, ventral view. 64. Maxillary palpus. 65 – 66. C. splendidum. 65. Pseudocephalon, ventral view. 66. Detail of ventral organ. 67 – 68. C. simillimum. 67. Pseudocephalon, ventral view. 68. Anterior spiracle, posterior view. A, antenna; C, cirri; LL, labial lobe; MH, mouth hook; MP, maxillary palpus; NS 1 – NS 2, first and second additional sensilla. SB 1 – SB 4, first to fourth sensilla basiconica; SC 1 – SC 4, first to fouth sensilla coeloconica; VO, ventral organ.

FIGURES 83 – 89. Calliopum aeneum, third instar, arrowheads indicate the tubercles. 83. Thoracic segments, dorsal view. 84. First and second thoracic segments, dorsal view. 85. Right dorsal tubercule (medial pair) of first thoracic segment. 86. Abdominal segments, dorsal view. 87. Abdominal segments, ventral view. 88. Anal division and last abdominal segments, dorsal view. 89. Abdominal segments, lateral view. A 1 – A 7, first to seventh abdominal segments; ACW, anterior creeping welt; AD, anal division; DP, dorsal process; LCW, lateral creeping welt; LP, lateral process; MCW, medial creeping welt; PCW, posterior creeping welt; PS, posterior spiracles, T 1 – T 3, first to third thoracic segments.

FIGURES 75 – 82. Calliopum species, third instar. 75 – 76. C. aeneum. 75. Pseudocephalon, ventral view. 76. Anterior spiracle, anterior view. 77 – 78. C. elisae. 77. Pseudocephalon, ventral view. 78. Anterior spiracle, lateral view. 79 – 80. C. splendidum. 79. Pseudocephalon, ventral view. 80. Lateral view of the pseudocephalon and first thoracic segments. 81 – 82. C. simillimum. 81. Pseudocephalon, ventral view. 82. Anterior spiracle, posterodorsal view. A, antenna; AS, anterior spiracle; C, cirri; CS, pseudocephalon; LL, labial lobe; MH, mouth hook; MP, maxillary palpus; T 1, first thoracic segments; VO, ventral organ.