Chlaenius (Lissauchenius) distigma Chaudoir, 1876

Chanu, N. Yaiphabi & Swaminathan, R., 2017, Notes on species of the genus Chlaenius Bonelli, 1810 (Coleoptera: Carabidae, Chlaeniini) from four agro-climatic zones of Rajasthan, with description of two new species, Zootaxa 4237 (3), pp. 545-566 : 558-559

Chlaenius (Lissauchenius) distigma Chaudoir, 1876

( Fig. 8 , 22 , 36 , 51 , 65 , 86, 87 & 107 )

Diagnosis. A single testaceous wavy spot on each elytron 1/3rd from apex covering intervals 4 to 8, elytral intervals punctate pubescent; pronotum ovoid, coarsely punctate pubescent, both apical and basal angles rounded; median tooth of mentum truncate at apex with rounded angles; labrum slightly emarginate at apex; apical segment of maxillary and labial palpi triangular; aedeagus short, stout, lamella rounded at apex, length of apical portion very short.

Description. BL = 13.72 mm, HW= 2.56 mm, PL= 2.78 mm, PW= 3.56 mm, EL= 8.32 mm, EW= 5.20 mm

Head and pronotum black having coppery metallic lustre in middle and metallic green lustre on sides. Elytra black and spot testaceous. Labrum and mandibles dark brown; labial and maxillary palpi, all parts of leg except coxae and first 3 antennomeres brown; remaining antennomeres and coxae almost black or fuscous.

Head punctate except disk portion of frons and posterior part of occiput; few depressed lines near eyes; labrum slightly emarginate at apical margin, apical angles rounded with some setae; clypeus almost truncate; frontal fovea shallow. Apical segment of maxillary and labial palpi triangular and truncate at apex. Median tooth of mentum truncate at apex with rounded angles.

Pronotum ovoid, lateral margins explanate, particularly towards base. Surface coarsely punctate, punctures with short hairs. Median line visible not reaching extremities; basal fovea shallow. Both apical and basal angles rounded.

Elytra striate punctate; intervals punctate, pubescent. Testaceous subapical spot on elytra covering 4th to 8th interval, band on 6th interval longer than those on other intervals; margins of spot wavy.

Prosternum coarsely punctate; proepisternum sparsely punctate pubescent; prosternal process bordered; mesosternum impunctate medially, punctate laterally; mesepisternum punctate, punctures with hairs; metasternum impunctate medially, punctate pubescent laterally; metepisternum punctate pubescent. Abdominal sternites finely and moderately punctate pubescent; smooth medially wrinkled at sides.

Aedeagus short; median lobe abruptly bent near base; apex of apical lobe rounded; left side of median lobe almost straight whereas right side expand laterally in dorsal view; length of apical portion very short.

Material examined. Total 16 specimens. 1♂, RCA Campus , Udaipur, Rajasthan, India / 27.vii.2014, Coll. N.Y. Chanu ; 1♂, RCA Campus , Udaipur, Rajasthan, India / 08.viii.2014, Coll. N.Y. Chanu ; 1♀, RCA Campus , Udaipur, Rajasthan, India / 18.ix.2014, Coll. N.Y. Chanu ; 1♂, RCA Campus , Udaipur, Rajasthan, India / 03.v.2015, Coll. R. Swaminathan ; 1♀, RCA Campus , Udaipur, Rajasthan, India / 09.v.2015, Coll. R. Nagar ; 1♂, RCA Campus , Udaipur, Rajasthan, India / 16.v.2015, Coll. N.Y. Chanu ; 1♂, RCA Campus , Udaipur, Rajasthan, India / 14.vii.2015, Coll. N.Y. Chanu ; 1♀, RCA Campus , Udaipur, Rajasthan, India / 17.vii.2015, Coll. R. Swaminathan ; 1♀, RCA Campus , Udaipur, Rajasthan, India / 26.ix.2015, Coll. Shivangi ; 1♀, RCA Campus , Udaipur, Rajasthan, India / 15.vii.2016, Coll. N.Y. Chanu ; 1♂, RCA Campus , Udaipur, Rajasthan, India / 31.vii.2016, Coll. N.Y. Chanu ; 1♂, RCA Campus , Udaipur, Rajasthan, India / 20.ix.2016, Coll. N.Y. Chanu ; 1♀, RCA Campus , Udaipur, Rajasthan, India / 23.ix.2016, Coll. R. Swaminathan ; 1♀, NRCSS, Ajmer , Rajasthan, India / 26.ix.2016, Coll. N.Y. Chanu ; 2♀, ARS, Bhilwara , Rajasthan, India / 27.ix.2016, Coll. N.Y. Chanu.

Figures

FIGURES 1 – 14. Pronotum of Chlaenius species from Rajasthan: 1. C. laevipennis; 2. C. nitidicollis; 3. C. hamifer; 4. C. scapularis; 5. C. malachinus; 6. C. orbicollis; 7. C. posticus; 8. C. distigma; 9. Chlaenius udaipurensis sp. nov.; 10. C. chlorodius; 11. C. pretiosus; 12. C. quadricolor; 13. C. velocipes; 14. Chlaenius pseudotristis sp. nov.

FIGURES 15 – 28. Labrum of Chlaenius species from Rajasthan: 15. C. laevipennis; 16. C. nitidicollis; 17. C. hamifer; 18. C. scapularis; 19. C. malachinus; 20. C. orbicollis; 21. C. posticus; 22. C. distigma; 23. Chlaenius udaipurensis sp. nov.; 24. C. chlorodius; 25. C. pretiosus; 26. C. quadricolor; 27. C. velocipes; 28. Chlaenius pseudotristis sp. nov.

FIGURES 29 – 42. Mentum of Chlaenius species from Rajasthan: 29. C. laevipennis; 30. C. nitidicollis; 31. C. hamifer; 32. C. scapularis; 33. C. malachinus; 34. C. orbicollis; 35. C. posticus; 36. C. distigma; 37. Chlaenius udaipurensis sp. nov.; 38. C. chlorodius; 39. C. pretiosus; 40. C. quadricolor; 41. C. velocipes; 42. Chlaenius pseudotristis sp. nov.

FIGURES 43 – 57. Maxillary palpi of Chlaenius species from Rajasthan: 43. C. laevipennis; 44. C. nitidicollis; 45. C. hamifer; 46. C. scapularis; 47. C. malachinus; 48. C. orbicollis (♂); 49. C. orbicollis (♀); 50. C. posticus; 51. C. distigma; 52. Chlaenius udaipurensis sp. nov.; 53. C. chlorodius; 54. C. pretiosus; 55. C. quadricolor; 56. C. velocipes; 57. Chlaenius pseudotristis sp. nov.

FIGURES 58 – 71. Labial palpi of Chlaenius species from Rajasthan: 58. C. laevipennis; 59. C. nitidicollis; 60. C. hamifer; 61. C. scapularis; 62. C. malachinus; 63. C. orbicollis; 64. C. posticus; 65. C. distigma; 66. Chlaenius udaipurensis sp. nov.; 67. C. chlorodius; 68. C. pretiosus; 69. C. quadricolor; 70. C. velocipes; 71. Chlaenius pseudotristis sp. nov.

FIGURES 72 – 99. Male genitalia of Chlaenius species from Rajasthan: 72. C. laevipennis (left lateral view); 73. C. laevipennis (dorsal view); 74. C. nitidicollis (left lateral view); 75. C. nitidicollis (dorsal view); 76. C. hamifer (left lateral view); 77. C. hamifer (dorsal view); 78. C. scapularis (left lateral view); 79. C. scapularis (dorsal view); 80. C. malachinus (left lateral view); 81. C. malachinus (dorsal view); 82. C. orbicollis (left lateral view); 83. C. orbicollis (dorsal view); 84. C. posticus (left lateral view); 85. C. posticus (dorsal view); 86. C. distigma (left lateral view); 87. C. distigma (dorsal view); 88. Chlaenius udaipurensis sp. nov. (left lateral view); 89. Chlaenius udaipurensis sp. nov. (dorsal view); 90. C. chlorodius (left lateral view); 91. C. chlorodius (dorsal view); 92. C. pretiosus (left lateral view); 93. C. pretiosus (dorsal view); 94. C. quadricolor (left lateral view); 95. C. quadricolor (dorsal view); 96. C. velocipes (left lateral view); 97. C. velocipes (dorsal view); 98. Chlaenius pseudotristis sp. nov. (left lateral view); 99. Chlaenius pseudotristis sp. nov. (dorsal view)

FIGURES 106 – 111. Habitus of Chlaenius taxa from Rajasthan. 106. C. orbicollis; 107. C. distigma; 108. Chlaenius udaipurensis sp. nov.; 109. C. chlorodius; 110. C. pretiosus; 111. C. quadricolor.