| 词条 | Lyriothemis acigastra |
| 释义 |
| image = Lyriothemis acigastra male at Kadavoor.jpg | image_caption = Male, Kadavoor | image2 = Lyriothemis acigastra female at Kadavoor.jpg | image2_caption = Female, Kadavoor | status = DD | status_system = IUCN3.1 | status_ref = [1] | genus = Lyriothemis | species = acigastra | authority = (Selys, 1878) | synonyms = Calothemis acigastra {{small|Selys, 1878}}}}Lyriothemis acigastra[1] is a species of dragonfly in the family Libellulidae known from India.[2][3] The International Union for Conservation of Nature also cites very old collections in Burma, China and Tibet.[4][5] The genus Lyriothemis is made up of 15 species and is widespread across Asia. Three species in the genus are known from India; L. cleis, L. tricolor and L. acigastra. All three were thought to be restricted to the northeastern states of Assam and West Bengal, but, in 2013, L. acigastra and L. tricolor were recorded in the southern state of Kerala.[2][6] DescriptionIt is a small dragonfly with brown-capped greenish-yellow eyes. Its thorax is blackish brown, marked with yellow. There is a broad oval antehumeral (situated in front of the fore legs)[7] stripe and a short transverse stripe bordering it just below. Laterally there are three stripes. The wings are transparent, and palely tinted with yellow at the extreme base. The abdomen in the male is blood-red, tapered from base to end, and marked with black. Segment 1 is black, with its apical border narrowly red. Segment 2 has its base broadly black and apical border less so. Segments 3 to 8 have the borders narrowly black and the mid-dorsal carina broadly so. This mid-dorsal black stripe dilate at the apical ends of 3 to 6. Segment 9 has only a narrow short red stripe on each side. Segment 10 is entirely black. The anal appendages are black.[5] The female is similar to the male, except that the abdomen is cylindrical rather than tapered from base to end and is a reddish-yellow color instead of blood red.[5] HabitatLittle is known about the species's ecology or habitat, which could be because of its rarity and secretive nature. The specimens reported in 2013 were found in bushes around freshwater marshland and streams. Individuals were generally at their most active in the evening and morning; males rested at around {{convert|8|to|10|m|ft}} from the ground, and preyed upon skippers and moths.[2] The species closely resembles the Sri Lankan species L. defonsekai, described in 2009.[8] See also{{Commons}}{{Wikispecies}}
References1. ^{{World Odonata List}} {{Taxonbar|from=Q2413777}}2. ^1 2 {{cite journal|year=2013|volume=5|issue=1|pages=73–4|journal= Taprobanica: The Journal of Asian Biodiversity|title= Lyriothemis acigastra: a new addition to the odonata fauna of Peninsular India|author1=Emiliyamma KG |author2=Palot Md |author3=Radhakrishnan C |author4=Balakrishnan VC |doi=10.4038/tapro.v5i1.5672}} 3. ^{{cite book |last1=K.A. |first1=Subramanian |last2=K.G. |first2=Emiliyamma |last3=R. |first3=Babu |last4=C. |first4=Radhakrishnan |last5=S.S. |first5=Talmale |title=Atlas of Odonata (Insecta) of the Western Ghats, India |date=2018 |publisher=Zoological Survey of India |isbn=9788181714954|pages=334-335}} 4. ^1 {{cite journal | author =Dow, R.A. | title = Lyriothemis acigastra | journal = IUCN Red List of Threatened Species | volume= 2009| page = e.T163701A5638198| publisher = IUCN | year = 2009| url = http://www.iucnredlist.org/details/163701/0| accessdate = 14 February 2017 }} 5. ^1 2 {{cite book|author=C FC Lt. Fraser|author-link=Frederic Charles Fraser|title=The Fauna of British India, including Ceylon and Burma, Odonata Vol. III|publisher=Taylor and Francis|location=Red Lion Court, Fleet Street, London|year=1936|pages=265-267|url=https://archive.org/details/FraserOdonata3/page/n275}} 6. ^{{cite journal|year = 2013|volume = 5|issue = 17|pages = 5237–5346|journal = Journal of Threatened Taxa|title = Range extension and larval habitat of Lyriothemis tricolor Ris, 1919 (Odonata: Anisoptera: Libellulidae) from southern Western Ghats, India.|author = Das, K.S.A.|author2 = K.A. Subramanian|author3 = K.G. Emiliyamma|author4 = M.J. Palot|author5 = K.A. Nishadh|last-author-amp = yes|doi = 10.11609/JoTT.o3716.5237-46}} 7. ^{{Cite web|url=https://www.wordnik.com/words/antehumeral|title=antehumeral — definition, examples, related words and more at Wordnik|website=Wordnik.com|access-date=2019-03-27}} 8. ^{{cite journal|title= Lyriothemis defonsekai spec. nov. from Sri Lanka, with a review of the known species of the genus (Anisoptera: Libellulidae)|author= Poorten Nvd|journal=Odonatologica|volume=38|issue=1|pages=15–27|url=http://natuurtijdschriften.nl/download?type=document&docid=592648}} 5 : Libellulidae|Odonata of Asia|Insects of India|Insects described in 1878|Taxa named by Edmond de Sélys Longchamps |
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