Calliopum splendidum

Semelbauer, Marek & Kozánek, Milan, 2012, Morphology of preimaginal stages of Lauxania and Calliopum (Diptera: Lauxaniidae), Zootaxa 3346, pp. 1-28 : 24-25

Calliopum splendidum

Egg ( Figs 41–43 ). Length 0.65–0.74 mm Chorion slightly differentiated in dorsal and ventral side. Dorsal side with more developed longitudinal ridges and regular longitudinal channels.

First larval instar ( Figs 51, 52 , 55–60 ). Length 1.12–2.16 mm. Length of cephaloskeleton ( Fig. 113 ) 0.21–0.22 mm.

Second larval instar ( Figs 65, 66 , 69–74 ). Length 2.14–3.58 mm. Length of cephaloskeleton ( Fig. 114 ) 0.37–0.39 mm.

Third larval instar ( Figs 79 , 101–106 ). Length 3.53–4.30 mm. Anterior spiracles with 7 papillae, the two marginal papillae are curved back ( Fig 80 ). Integument of abdominal segments and anal division villous, small smooth areas are retained behind dorsal tubercules in first four segments and partly between segment borders. Extensive smooth areas are on the ventral side behind anterior creeping welt. The only species of Calliopum with comb spines on the posterior half of the first thoracic segment. Length of cephaloskeleton ( Fig. 115 ) 0.61–0.63 mm.

Puparium ( Fig. 121). Length 3.61–3.89 mm. Indistinguishable from C. simillimum . Smaller size can be result of unfavourable rearing conditions, as adult flies are comparably large to C. simillimum .

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 55 – 60. Calliopum splendidum, first instar, arrowheads indicate the tubercles. 55. Second and third thoracic segment, dorsal view. 56. Pseudocephalon and first thoracic segment, dorsal view. 57. Abdomnal segments, dorsal view. 58. Abdominal segments, ventral view. 59. Abdominal segments, lateral view. 60. Posterior spiracles, posterodorsal view.

FIGURES 113 – 115. Cephaloskeleton of C. splendidum. From the top for each figure: dorsal, lateral and ventral view. 113. First instar. 114. Second instar. 115. Third instar. db, dorsal bridge; dc, dorsal cornu; ds, dental sclerite; es, epistomal sclerite; dmh, dentate part of mouth hook; is, intermediate sclerite; lb, labrum; ls, ligulate sclerite; mh, mouth hook; pb, parastomal bar; ph, pharynx; r, rami; smh, stalk part of mouth hook; ss, subhypostomal sclerite; vb, ventral bridge; vc, ventral cornu; vp, vertical plate.

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 69 – 74. Calliopum splendidum, second instar, arrowheads indicate the dorsal tubercles, head is always oriented to the right. 69. Thoracic segments, dorsal view. 70. First thoracic segment, dorsal view. 71. Left sensilla of middle pair from the first thoracic segment. 72. Abdominal segments, ventral view. 73. Abdominal segments, dorsal view. 74. Anal division and last abdominal segments, dorsal view. A 1 – A 7, first to seventh abdominal segments; ACW, anterior creeping welt; AD, anal division; AL, ambulatory lobes; AS, anterior spiracle; DP, dorsal process; 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.

FIGURES 101 – 106. Calliopum splendidum, third instar, arrowheads indicate the tubercles. 101. First and second thoracic segment, dorsal view. 102. Third thoracic and first abdominal segments, dorsal view. 103. Abdominal segments, ventral view. 104. Abdominal segments, lateral view. 105. Anal division and last abdominal segments, dorsal view. 106. Posterior spiracles, dorsal view. A 1 – A 7, first to seventh abdominal segments; ACW, anterior creeping welt; AL, ambulatory lobe; AS, anterior spiracle; DP, dorsal process; LCW, lateral creeping welt; LP, lateral process; PCW, posterior creeping welt; PS, posterior spiracles; T 1 – T 3, first to third thoracic segments.