Christmas Beetles
of New South Wales

Glossary
References




Pygidial Pubescence

Locating the pygidium

The pygidium is the last visible dorsal segment of the abdomen and is the most posterior part of the body in dorsal view.

Figure 1. Dorsal view of Anoplognathus.

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dorsal image of Anoplognathus sp.

Photo Figure 1 © Kindi Smith, Australian Museum

States of pygidial pubescence

The following states refer to the broad central area of the pygidium, excluding the margins which are often different.

There are three states

  1. with close or dense erect or recumbent white setae (Figure 2A)

  2. glabrous or with sparse often brown erect setae, without uniform clothing of white setae (Figure 2B)

  3. with median strip of recumbent white setae and smooth almost glabrous patches on either side (Figure 2C)

Figure 2. Posterior view of pygidium

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pygidial pubescence - dense decumbent white setaepygidial pubescence - glabrouas to sparse, few setaepygidial pubescence - medially and marginally setose with glabrous patches
pygidial pubescence - larger images swaps

scale bar equals 1mm
Photos Figure 2 © Kindi Smith, Australian Museum

 

Australian Museum
Copyright © Australian Museum 2016
Authors: Chris Reid & Kindi Smith
pygidium