Caccothryptus arakawae

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Caccothryptus arakawae
Caccothryptus arakawae.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Coleoptera
Family: Limnichidae
Genus: Caccothryptus
Species:
C. arakawae
Binomial name
Caccothryptus arakawae
Matsumoto, 2021

Caccothryptus arakawae is a species of minute marsh-loving beetle in the subfamily Limnichinae. The species was described alongside five other Caccothryptus species by Natural History Museum entomologist Keita Matsumoto in 2021, using specimens gathered by Martin J. D. Brendell at Kathmandu, Nepal in 1983. Six of Brendell's specimens were distinguished from its initial classification of Caccothryptus testudo due to distinct genital structures. The species was named for Hiromu Arakawa, the creator of manga series Fullmetal Alchemist.

Contents

Taxonomy

The Limnichidae (minute marsh-loving beetle) genus Caccothryptus was first described by David Sharp in 1902. [1] [2] In 2014, the genus was divided into five species groups by Carles Hernando and Ignacio Ribera. [2]

A group of Caccothryptus specimens were collected in 1983 in Kathmandu, Nepal by Martin J. D. Brendell, curator of Coleoptera Department of Entomology at the Natural History Museum, London. These were labeled as C. ripicola and C. testudo, first described by forester Harry George Champion in 1923. These were stored at the Natural History Museum. In 2021, museum entomologist Keita Matsumoto identified a number of distinct species from these specimens. A male specimen from Kathmandu was labeled as the holotype for Caccothryptus arakawae. Five specimens (comprising three males and two females) were labeled paratypes .C. arakawae was placed in the species group C. testudo and named for Japanese manga artist Hiromu Arakawa, the creator of Fullmetal Alchemist . [3]

Description

The Caccothryptus arakawae specimens identified by Matsumoto have elytral lengths of 3.39–3.68 mm, and elytral widths of 2.32–2.52 mm. Their prothoraces are 0.90–1 mm in length and 2.03–2.11 mm in width. C. arakawae has an elongated oval body, brown in colour except for reddish tibia and long, white setae, which are distributed across both the upper and lower sides of the beetle. Its tarsi are divided into five segments, of increasing length, with the fifth segment as long as the others combined. It has long, narrow, light brown tarsal claws. The beetle's head, smooth and punctured, is slightly retracted into its pronotum, and features eleven-segment antennae. Little sexual dimorphism exists between the male and female specimen, beyond a longer fifth abdominal ventrite on the female. [4]

The beetle's genitals display a number of differences from the original classification of C. testudo, which enabled its classification as a separate species. C. arakawae's median lobe narrows to a slightly pointed tip. It has a U-shaped depression between the V-shaped notches on the tip of the genitalia. The genitals' dorsum are wavy, forming two concave curves. Females have a long ovipositor. [4]

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<i>Caccothryptus tardarsauceae</i> Species of beetle

Caccothryptus tardarsauceae is a species of minute marsh-loving beetle in the subfamily Limnichinae. The species was described alongside five other Caccothryptus species by Natural History Museum entomologist Keita Matsumoto in 2021, using a male specimen gathered in 1953 by Harry George Champion in Haldwani, India. One of Champion's specimens was distinguished from its initial classification of C. ripicola due to distinct genital structures. The species was named for Tardar Sauce, also known as Grumpy Cat, a pet cat which had become an internet celebrity prior to her death in 2019.

<i>Caccothryptus brendelli</i> Species of beetle

Caccothryptus brendelli is a species of minute marsh-loving beetle in the subfamily Limnichinae. The species was described alongside five other Caccothryptus species by Natural History Museum entomologist Keita Matsumoto in 2021, using specimens gathered by Martin J. D. Brendell at Kathmandu, Nepal in 1983. One of Brendell's specimens were distinguished from Caccothryptus testudo due to distinct genital structures and labeled C. brendelli after Brendell.

<i>Caccothryptus championi</i> Species of beetle

Caccothryptus championi is a species of minute marsh-loving beetle in the subfamily Limnichinae. The species was described alongside five other Caccothryptus species by Natural History Museum entomologist Keita Matsumoto in 2021, using specimens gathered in 1953 by Harry George Champion in Haldwani, India alongside an earlier 1925 specimen collected nearby. Like the other Caccothryptus species described by Matsumoto, it was distinguished from its original classification of C. ripicola due to differences in the shape of its genitalia. Twenty-seven specimens from the British Natural History Museum collection were identified with C. championi, named after Champion.

<i>Caccothryptus abboti</i> Species of beetle

Caccothryptus abboti is a species of minute marsh-loving beetle in the subfamily Limnichinae. The species was described alongside five other Caccothryptus species by Natural History Museum entomologist Keita Matsumoto in 2021, using specimens gathered in 1953 by Harry George Champion in Haldwani, India alongside an earlier 1925 specimen collected nearby. Like the other Caccothryptus species described by Matsumoto, it was distinguished from its original classification of C. testudo due to differences in the shape of its genitalia. One specimen collected by Champion was identified as the holotype for C. abboti and named for English radio presenter Nick Abbot.

Caccothryptus yunnanensis is a species of minute marsh-loving beetle in the subfamily Limnichinae. The species was described in 2018 by enomologist Hiroyuki Yoshitomi. Although part of the species group C. testudo, it is related to the C. compactus species C. chayuensis) and C. thai due to serrae due to their shared small notches along the median lobe. It is distinguished from these due to its straight parameres, which are curved in C. chayuensis and C. thai. C. yunnanensis specimens were collected by Yu-Tang Wang across the Chinese provinces of Guizhou and Yunnan, the latter of which gave the species its name. It is almost entirely black in coloration, except for dark and light brown in its antennae and legs. It has an average length of around 5 mm. The holotype of C. yunnanensis is a male collected in Xima, Yunnan in 2014.

Caccothryptus is a genus of minute marsh-loving beetle in the subfamily Limnichinae. The genus was first described by entomologist David Sharp in 1902, with C. compactus as the type species.

References

  1. "Sharp, David. 1902. Descriptions of Oriental Limnichini (Coleoptera, Fam. Byrrhidae)". ZooBank . Retrieved 5 July 2024.
  2. 1 2 Matsumoto 2021, p. 168.
  3. Matsumoto 2021, pp. 168, 171.
  4. 1 2 Matsumoto 2021, pp. 171–173.

Bibliography