Pseudoexeirarthra

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This page should be cited as follows (rationale):
Park J, Carlton C (2015) Pseudoexeirarthra, a new genus from New Zealand (Coleoptera, Staphylinidae, Pselaphinae), with descriptions of seven new species. ZooKeys (491) : 95–118, doi. Versioned wiki page: 2015-03-26, version 70501, https://species-id.net/w/index.php?title=Pseudoexeirarthra&oldid=70501 , contributors (alphabetical order): Pensoft Publishers.

Citation formats to copy and paste

BibTeX:

@article{Park2015ZooKeys,
author = {Park, Jong-Seok AND Carlton, Christopher E.},
journal = {ZooKeys},
publisher = {Pensoft Publishers},
title = {Pseudoexeirarthra, a new genus from New Zealand (Coleoptera, Staphylinidae, Pselaphinae), with descriptions of seven new species},
year = {2015},
volume = {},
issue = {491},
pages = {95--118},
doi = {10.3897/zookeys.491.9164},
url = {http://zookeys.pensoft.net/articles.php?id=4974},
note = {Versioned wiki page: 2015-03-26, version 70501, https://species-id.net/w/index.php?title=Pseudoexeirarthra&oldid=70501 , contributors (alphabetical order): Pensoft Publishers.}

}

RIS/ Endnote:

TY - JOUR
T1 - Pseudoexeirarthra, a new genus from New Zealand (Coleoptera, Staphylinidae, Pselaphinae), with descriptions of seven new species
A1 - Park J
A1 - Carlton C
Y1 - 2015
JF - ZooKeys
JA -
VL -
IS - 491
UR - http://dx.doi.org/10.3897/zookeys.491.9164
SP - 95
EP - 118
PB - Pensoft Publishers
M1 - Versioned wiki page: 2015-03-26, version 70501, https://species-id.net/w/index.php?title=Pseudoexeirarthra&oldid=70501 , contributors (alphabetical order): Pensoft Publishers.

M3 - doi:10.3897/zookeys.491.9164

Wikipedia/ Citizendium:

<ref name="Park2015ZooKeys">{{Citation
| author = Park J, Carlton C
| title = Pseudoexeirarthra, a new genus from New Zealand (Coleoptera, Staphylinidae, Pselaphinae), with descriptions of seven new species
| journal = ZooKeys
| year = 2015
| volume =
| issue = 491
| pages = 95--118
| pmid =
| publisher = Pensoft Publishers
| doi = 10.3897/zookeys.491.9164
| url = http://zookeys.pensoft.net/articles.php?id=4974
| pmc =
| accessdate = 2021-04-18

}} Versioned wiki page: 2015-03-26, version 70501, https://species-id.net/w/index.php?title=Pseudoexeirarthra&oldid=70501 , contributors (alphabetical order): Pensoft Publishers.</ref>

See also the citation download page at the journal.


Taxonavigation

Ordo: Coleoptera
Familia: Staphylinidae

Name

Pseudoexeirarthra Park & Carlton gen. n.Wikispecies linkZooBank linkPensoft Profile

Type species

Sagola spinifer Broun, 1895: 75; here designated.

Diagnosis

Members of Pseudoexeirarthra can be separated from those of all other faronite genera by the following combination of characters: body length 1.8–2.8 mm; frontal sulcus broad and shallow, reaching level of the midline of eyes (Fig. 2A); lacking anterior and posterior frontal foveae (Fig. 2A); prosternum with lateral procoxal foveae (Fig. 2B); mesoventrite lacking promesocoxal foveae (Fig. 2C); tergites IV–VI with inverted triangle-shaped process on anterior margins (Fig. 2D); sternites IV–VI with basolateral foveae; female sternite VIII with pseudosternite (Fig. 2F); female sternite IX bearing pair of small process that each bear two long setae (Fig. 2G).

Description

Body length 1.8–2.8 mm. Body reddish, antennae, legs, maxillary palpi and elytra paler (Fig. 1A–J). Head. Antennae gradually clavate, reaching posterior margin of prothorax. Head bluntly triangular and longer than wide (Fig. 1A–J). Apex of left mandible thicker than right (Fig. 2E). Frontal sulcus broad and shallow, reaching level of the midline of eyes, lacking anterior and posterior frontal foveae (Fig. 2A). Prosternum bearing median and lateral procoxal foveae (Fig. 2B). Mesoventrite lacking promesocoxal foveae, bearing lateral mesoventral and lateral mesocoxal foveae (Fig. 2C). Metaventrite with pair of lateral metaventral foveae (Fig. 2C). Tergites IV–VI with inverted triangle-shaped process on anterior margins (Fig. 2D). Aedeagus with bulky and round phallobase (Fig. 3A–J). Parameres bearing setae along mesal margin for one-third to two-thirds length of parameres (Fig. 3A–J). Female sternite VIII with pseudosternite (Fig. 2F). Female sternite IX bearing pair of small process that each bear two long setae (Fig. 2G).

Etymology

The generic name refers to the superficial similarity to the genus Exeirarthra Broun.

Comments

Members of this genus lack distinct external secondary sexual characters except on abdominal sternite IX. Male sternite IX is fragile, and partially concealed by sternite VIII, rendering it simple and reduced in appearance. Females possess a more robust, heart-shaped or rounded sternite IX that bears two pairs of long setae that are usually visible in ventral view. Female genitalia, including spermathecae, apparently are membranous and were not observed after clearing specimens using 10% potassium hydroxide.

Key to species of Pseudoexeirarthra gen. n

Note. The key is largely based on male genitalia because most specimens are indistinguishable based on the external morphology. Antennal shape and eye size are apparently unique within species. However, apparent variations may result from viewing at inconsistent orientations among specimens. These characters are difficult to interpret consistently when performing identifications, but still useful in comparing types or specimens in series.

Original Description

  • Park, J; Carlton, C; 2015: Pseudoexeirarthra, a new genus from New Zealand (Coleoptera, Staphylinidae, Pselaphinae), with descriptions of seven new species ZooKeys, (491): 95-118. doi

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