Micridium elegans, Darby, Michael, 2017

Darby, Michael, 2017, Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar, Zootaxa 4242 (2), pp. 233-254 : 241-242

publication ID	https://doi.org/10.11646/zootaxa.4242.2.2
publication LSID	lsid:zoobank.org:pub:0DD1868D-4EF5-4FB7-AEE9-372644800A79
DOI	https://doi.org/10.5281/zenodo.6045195
persistent identifier	https://treatment.plazi.org/id/03E64B08-E320-FFFD-8585-5E4CFC72EA94
treatment provided by	Plazi (2017-03-10 08:26:22, last updated 2024-11-26 07:04:06)
scientific name	Micridium elegans
status	sp. nov.

Treatment

Micridium elegans View in CoL sp.n.

( Figs. 8 View FIGURES 1 – 14 , 23 View FIGURES 17 – 32 , 36 View FIGURES 33 – 41 , 44 View FIGURES 42 – 46 , 57 View FIGURES 47 – 60 , 66 View FIGURES 61 – 71 , 74 View FIGURES 72 – 81 , 83a/b)

Habitus Fig. 8 View FIGURES 1 – 14 . Length 0.66 mm. Colour: dark, almost black, pubescence, antennomeres and legs brown. Antennomeres 4–8 widest medially and narrowed before base and apex; length of 3–11 0.29 mm, Fig. 44 View FIGURES 42 – 46 . Width across eyes 0.20 mm. Mentum narrowed towards base, sides straight, submentum with 3 setae, Fig 36 View FIGURES 33 – 41 . Pronotum length 0.14 mm, width 0.24 mm, widest in front of middle, with two distinct linear depressions in basal half narrowed anteriorly, Fig. 23 View FIGURES 17 – 32 . Elytra length 0.44 mm, width 0.29 mm. Mesoventrum: collar without clear humeri, keel flattened between mesocoxae, Fig. 57 View FIGURES 47 – 60 . Mesepiventra without clear reticulation, smoothly rounded to mesocoxae which are more widely separated than species with a narrow keel, Fig. 57 View FIGURES 47 – 60 . Metaventrum: metepiventral sutures close to lateral margins and reaching posterior margin, Fig. 66 View FIGURES 61 – 71 , posterior intercoxal process straight between lateral points. Wings of usual ptiliid type.

Male: aedeagus strongly humped with a large median and two shorter lateral projections Figs. 83 a/b.

Female: spermatheca Fig. 74 View FIGURES 72 – 81 .

Etymology. Named after the rather elegant appearance of the species.

Diagnosis. The very dark colour, length of antennomeres 4–7, lack of mesoventral humeri, and form of both the female and male genitalia quickly distinguish this species.

Type data: Holotype: ♀, Peru, Cusco Dept., Villa Carmen field station, 1.7 km west cafeteria research transect, Flight intercept trap, 12.89250S 71.41917W, 555m, 21–22.v.2011, D.J.Bennett & E. Razuri ( MUSM) GoogleMaps . Paratypes: 6 examples, same data as holotype ( MUSM, SEMC, BMNH) GoogleMaps .

Figures

FIGURES 1 – 14. Micridium habitus. 1. M. angulicolle (Fairmaire) 2. M. halidaii (Matthews) 3. M. vittatum Motschulsky 4. M. lineatum Le Conte 5. M. rhodeanum (Casey) 6. M. hilli (Johnson) 7. M. johnsoni sp. n. 8. M. elegans sp. n. 9. M. oweni sp. n. 10. M. attenboroughi sp. n. 11. M. boliviense sp. n. 12. M. newtoni sp. n. 13. M. foveatum sp. n. 14. M. thayerae sp. n. 15. M. proprium sp. n. 16. M. quadridens sp. n.

FIGURES 17 – 32. Micridium pronotums. 17. M. quadridens sp. n. x 605. 18. M. inornatum sp. n. x 590. 19. M. boliviense sp. n. x 625. 20. M. newtoni sp. n. x 695. 21. M. foveatum sp. n. x 830. 22. M. johnsoni sp. n. x 790. 23. M. elegans sp. n. x 810. 24. M. thayerae sp. n. x 650. 25. M. halidaii (Matthews) x 770. 26. M. hilli (Johnson) x 740. 27. M. oweni sp. n. x 575. 28. M. attenboroughi sp. n. x 675. 29. M. angulicolle (Fairmaire). 30. M. rhodeanum (Casey) 31. M. vittatum Motschulsky 32. M. lineatum Le Conte.

FIGURES 33 – 41. Micridium mentums. 33. M. oweni sp. n. x 1420. 34. M. attenboroughi sp. n. x 1840. 35. M. boliviense sp. n. x 1280. 36. M. elegans sp. n. x 1320. 37. M. proprium sp. n. x 2360. 38. M. quadridens sp. n. x 1900. 39. M. johnsoni sp. n. x 1600. 40. M. foveatum sp. n. x 1220. 41. M. thayerae sp. n. x 1160.

FIGURES 42 – 46. Micridium antennae. 42. M. quadridens sp. n. showing more rounded antennomeres on shorter antennae. 43. M. thayerae sp. n. 44. M. elegans sp. n. showing more elongate antennomeres. 45. M. johnsoni sp. n. x 2000 antennomeres 9 – 11 showing single sensillae on 10 & 11. 46. M. foveatum sp. n. x 1800 antennomeres 10 & 11 showing branched sensillae.

FIGURES 47 – 60. Micridium mesoventra. 47. M. inornatum sp. n. x 540. 48. M. quadridens sp. n. x 710. 49. M. boliviense sp. n. x 695. 50. M. attenboroughi sp. n. x 870. 51. M. proprium sp. n. x 920. 52. M. newtoni sp. n. 53. M. johnsoni sp. n. x 655. 54. M. thayerae sp. n. x 860. 55. M. halidaii (Matthews) x 615. 56. M. oweni sp. n. x 585. 57. M. elegans sp. n. x 705. 58. M. hilli (Johnson) x 760. 59. M. foveatum sp. n. x 1300. 60. M. rhodeanum (Casey) x 545.

FIGURES 61 – 71. Micridium metepiventral sutures. 61. M. johnsoni sp. n. x 530. 62. M. thayerae sp. n. x 505. 63. M. attenboroughi sp. n. x 670. 64. M. foveatum sp. n. x 735. 65. M. quadridens sp. n. x 710. 66. M. elegans sp. n. x 730. 67. M. oweni sp. n. x 585. 68. M. hilli (Johnson) x 760. 69. M. halidaii (Matthews) x 615. 70. M. newtoni sp. n. x 710. 71. M. rhodeanum (Casey) x 545.

FIGURES 72 – 81. Micridium spermathecae. 72 a / b. M. attenboroughi sp. n. 73. M. boliviense sp. n. 74. M. elegans sp. n. 75. M. foveatum sp. n. 76. M. halidaii (Matthews) (may have been broken or distorted in preparation). 77 a / b. M. johnsoni sp. n. 78. M. hilli (Johnson) 79. M. thayerae sp. n. 80. M. inornatum sp. n. 81. M. newtoni sp. n.