A new genus and species of scorpionfly (Mecoptera) from Baltic amber, with an unusually developed postnotal organ
A new genus and species of scorpionfly (Mecoptera) from Baltic amber, with an unusually developed postnotal organ
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DOI：
10.1111/j.1365-3113.2011.00602.x
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发表时间：
2012-01-01
影响因子：
4.8
通讯作者：
Soszynska-Maj, Agnieszka
中科院分区：
文献类型：
--
作者：
Krzeminski, Wieslaw;Soszynska-Maj, Agnieszka
化石蝎蛉一新属新种（长翅目）Baltialpadamzenigen.等种在波罗的海琥珀（中始新世：Lutetian）中的两个保存完好的男性标本中描述。新分类群的最具特色的特征是一个不寻常的发达postnotal器官腹部tergum IV。这是长翅目中该器官最发达的例子，也是唯一在化石蝎蛉中观察到的背和背后器官。以下特征组合可将该新属与其他蝎蛉科区分开来：Sc，短; R1和R2两分支; A1仅在与静脉Rs分叉相同的水平上连接翅后边缘;腹部形状不寻常，腹部节IIV强烈缩小，腹部节V拉长并加宽，节VII和VIII强烈拉长;背和背后器官存在，在背板IV上强烈发育的突起（背后器官），在所有描述的现存和化石蝎蛉中未知。比较了长翅目昆虫背器官的不同类型，并对其功能和形态进行了讨论。通过对现存种的背、背后器官的形态学分析，我们可以得出结论：B.达姆泽尼什在长翅目昆虫中，背器官最发达、最复杂。
A new genus and species of fossil scorpionflies (Mecoptera) Baltipanorpa damzenigen. et sp.n. is described from two well-preserved male specimens in Baltic amber (middle Eocene: Lutetian). The most characteristic feature of the new taxon is an unusually developed postnotal organ on abdominal tergum IV. This is the most extremely developed example of this organ among Mecoptera and the only observation of notal and postnotal organs among fossil scorpionflies. The following combination of characters are provided to distinguish the new genus from other Panorpidae: Sc, short; R1 and R2 two-branched; A1 joins posterior margin of wing only at same level as fork of vein Rs; unusual shape of abdomen, abdominal segments IIV strongly reduced, abdominal segment V elongate and widened, segments VII and VIII strongly elongate; notal and postnotal organs present, strongly developed process (postnotal organ) on tergum IV, unknown in all described extant and fossil scorpionflies. Different types of notal organs of Mecoptera are compared and their function and morphology are discussed. Morphological analysis of notal and postnotal organs in extant species permits us to conclude that B. damzenisp.n. is characterized by the most developed and complex notal organs in all Mecoptera.