Trichadenotecnum desolatum
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publication ID |
https://doi.org/ 10.1111/j.1096-3642.2008.00398.x |
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persistent identifier |
https://treatment.plazi.org/id/7E7087BE-FFBE-BB30-FEEE-FC6D6927FC6C |
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treatment provided by |
Felipe |
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scientific name |
Trichadenotecnum desolatum |
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THE DESOLATUM View in CoL GROUP
Diagnosis: Forewing ( Fig. 5 View Figure 5 ) extensively covered with small spots to various degrees (sparse to dense), proximal band narrow and sometimes indistinct, submarginal spots not apparent; Rs fork obtuse; 3rd section of CuA more or less arched. Male terminalia. Eighth venter ( Fig. 6C View Figure 6 ) with large transversal sclerite separated from hypandrium. Clunial process ( Fig. 6A View Figure 6 ) developed but weekly sclerotized and never forming free process apically, variable in shape. Epiproct ( Fig. 6A, B View Figure 6 ) chair-shaped, epiproct lobe long, much longer than wide, gradually narrowing to truncate dorsal margin, protruded over clunium. Paraproctal distal process ( Fig. 6A View Figure 6 ) long, directed upwards. Hypandrium ( Fig. 6C View Figure 6 ) asymmetrical, with narrow longitudinal membranous or weakly sclerotized region anterior to median tongue socket; left process conical, variable in size; right process distinct, variable in shape and size. Median tongue arising from anterior part of hypandrium, much longer than wide. Phallosome ( Fig. 6D View Figure 6 ) with broad pseudoparameres. Female genitalia. Intraspecific variation of gonapophyses not significant ( Fig. 7B View Figure 7 ). Ventral valve of gonapophyses long; posterior lobe of external valve not strongly projected. Internal plate ( Fig. 7C View Figure 7 ) symmetrical or asymmetrical; spermathecal opening surrounded by egg-shaped strongly pigmented sclerite; anterior region almost unpigmented except for weakly pigmented anterior margin.
Remarks: Some species recognized below show considerable variation in some characters such as body size, eye size, wing markings and genital structures. Such variations sometimes exceed the morphological gap between species observed in other species groups (e.g. the medium group of eastern Asia: Yoshizawa, 2001). However, each species recognized below can be morphologically united by some features (as indicated in the Key to Species and species diagnoses), and thus we recognize such morphological groups as distinct species, although some species recognized below may actually include more than one biological species.
In contrast, some specimens examined in this study and recognized as members of the desolatum group are morphologically highly variable in many features and cannot be united morphologically ( Fig. 16 View Figure 16 ). Therefore, those specimens probably consist of more than one species. However, such variations are more or less continuous and decision on species boundaries is presently impossible. Therefore, we postpone classifying them as distinct species. To clarify their species boundaries, examination of more specimens, exact understanding of distributional ranges and probably molecular-based analyses are needed.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.