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ISSN : 1226-9999(Print)
ISSN : 2287-7851(Online)
Korean J. Environ. Biol. Vol.39 No.1 pp.16-18
DOI : https://doi.org/10.11626/KJEB.2021.39.1.016

A new record of Haplodrassus nojimai Kamura, 2007 (Araneae, Gnaphosidae) from Korea

Seung Tae Kim*, Jung Sun Yoo1
Life and Environment Research Institute, Konkuk University, Seoul 05029, Republic of Korea
1Biological and Genetic Resources Utilization Division, National Institute of Biological Resources, Incheon 22689,
Republic of Korea
* Corresponding author Seung Tae Kim Tel. 02-2049-6163 E-mail. stkim2000@hanmail.net
08/01/2021 22/01/2021 08/02/2021

Abstract


Haplodrassus nojimai Kamura, 2007 of Gnaphosidae, which is only known in Japan was newly described in Korea with measurements and morphological illustrations. A female was collected from the levee of rice fields using a pitfall trap. The female epigynum has thick and remarkable transverse wrinkles and is densely covered with long blackish-gray hairs. The anterior hood was slightly rounded and the lateral margins were relatively short. The median septum was V-shaped with a broad base on the median part, and a pair of spermathecae was visible. The male is still unknown.



초록


    Rural Development Administration(RDA)
    PJ01507103

    INTRODUCTION

    Spider fauna of rice field was surveyed for five years, 2016-2020. During a survey, one female of Haplodrassus nojimaiKamura, 2007 belonging to Gnaphosidae was collected on the levee with a pitfall trap. H. nojimai is formerly only known in Japan and nine species of the genus HaplodrassusChamberlin, 1922 have been reported form Korea (National Institute of Biological Resources 2019;World Spider Catalog 2020). The genus Haplodrassus was erected with Drassus hiemalis Emerton, 1909 as the type species (Chamberlin 1922). Male palp of the genus has thick embolus, hook-like median apophysis, developed terminal apophysis and characteristically flattened retrolateral tibial apophysis, and female epigynum has an anterior hood and lateral margins (Kamura 2007). The present study described a newly recorded spiders, H. nojimai with measurements, morphological illustrations from Korea.

    MATERIALS AND METHODS

    The external morphology was examined using a stereoscopic dissecting microscope (S8APO; LEICA, Singapore) and illustrated. Photographs of the body were taken with a CANON 650D with 60 mm macro-lens. Measurements of each part of the body were taken with an ocular micrometer scale and are recorded in millimeters. Leg and palp measurements (left) are given as leg number, total length (femur, patella+tibia, metatarsus, tarsus). The internal genitalia was prepared with 10% of KOH solution for six hours, and after examination, tissue pieces around it were removed with brushes and needles. Abbreviations used are as follows: ALE=anterior lateral eye, AME=anterior median eye, PLE=posterior lateral eye, PME=posterior median eye, AER=anterior eye row, PER=posterior eye row in eye region; d=dorsal surface, p=prolateral surface, r=retrolateral surface, v=ventral surface in leg spination. The examined specimen of this study was deposited in the collection of the National Institute of Biological resources (NIBR), Korea.

    TAXONOMIC ACCOUNTS

    Family Gnaphosidae Pocock, 1898

    Genus HaplodrassusChamberlin, 1922

    Haplodrassus nojimaiKamura, 2007

    주름새매거미 (신칭) (Fig. 1)

    Haplodrassus nojimaiKamura, 2007: p. 102, f. 32, 33; Kamura, 2009: p. 487, f. 46.

    Material examined. Female, 10 July 2020, Jikdong-ri, sangnam-myeon, Eonyang-eup, Ulsan Metropolitan City, Korea (35°34′86.0″N, 129°07′91.1″E), leg. S.T. Kim.

    Description. Female. Total length 5.80 (habitus). Carapace: 2.08 long/1.52 wide, blackish brown, head region darker than thoracic region, suboval, cervical and radial furrows distinct, longitudinal fovea needle-shaped, head region slightly elevated (Fig. 1A). Eyes: AER 0.50/PER 0.55, all eyes on slightly raised eye tubercles, eye region infuscate, eight eyes in two rows, AER slightly recurved and PER weakly procurved from above (Fig. 1B). Chelicera: 0.70 long/0.41 wide, thick blackish brown with 2 promarginal teeth and 2 retromarginal teeth, lateral condyle present, fang short (Fig. 1C). Endite: 0.61 long/0.30 wide, light blackish brown. Labium: 0.50 long/0.35 wide, thick blackish brown. Sternum: 1.22 long/0.98 wide, light blackish brown, subcordate, convex (Fig. 1D). Legs: I 4.95 (1.47, 1.93, 0.84, 0.70)/II 4.25 (1.25, 1.58, 0.76, 0.66)/III 3.76 (1.11, 1.27, 0.80, 0.58)/IV 5.61 (1.57, 2.03, 1.27, 0.74), leg formula IV-I-II-III, light blackish brown, robust and strongly developed, no annulus, leg spination; I (femur 1-1-1d), II (femur 1-1-0d, metatarsus 2-0v), III (femur 1-1-2d, tibia 0-1-1p/0-1-1r/2-2-2v, metatarsus 1-1p/1-1r/2-0-2v), IV (femur 1-1-2d, tibia 1-0-1p/1-0-1r/2-2-2v, metatarsus 0-1-1p/0-1-1r/2-1-2v) (Fig. 1). Abdomen: 2.97 long/1.80 wide, dark blackish gray, elongated oval, no particular pattern, clothed densely with short hairs (Fig. 1A). Palp: 3.20 (1.40, 0.68, - , 1.12). Epigynum: upper part of epigynum with thick and remarkable transverse wrinkles, clothed densely with long blackish gray hairs, anterior hood slightly round, lateral margins relatively short, V-shaped median septum with broad base on median part, a pair of spermathecae visible (Fig. 1E, F).

    Male unknown.

    Distribution. Korea (New record), Japan.

    Remarks. Present species was collected on the levee of rice fields with a pitfall trap. This species is considered to be a rare species with very low abundance as it has been described as only two females from Tottori pref. in Japan. There are no informative biological and ecological records of this species to date.

    ACKNOWLEDGEMENTS

    The study was supported by grants from the Rural Development Administration (RDA) (PJ 01507103) of Ministry of Agriculture, Food and Rural Affairs (MAFRA) and the National Institute of Biological Resources (NIBR), funded by the Ministry of Environment (MOE) of the Rep- ublic of Korea (NIBR202002204).

    Figure

    KJEB-39-1-16_F1.gif

    Haplodrassus nojimaiKamura, 2007, female: A. Body, habitus (specimen); B. Eye region from above; C. Chelicera, retrolateral view; D. Sternum; E. Epiginum, ventral view; F. Internal genitalia, dorsal view. Scale bars in mm. Ah, anterior hood; Co, copulatory opening; Fd, fertilization duct; Lm, lateral margin; Ms, median septum; S, spermatheca.

    Table

    Reference

    1. Chamberlin RV. 1922. The North American spiders of the family Gnaphosidae. Proc. Biol. Soc. Wash. 35:145-172.
    2. Kamura T. 2007. Spiders of the genus Haplodrassus (Araneae: Gnaphosidae) from Japan. Acta Arachnol. 55:95-103.
    3. Kamura T. 2009. Trochanteriidae, Gnaphosidae, Prodidomidae, Corinnidae. pp. 483-500. In: The Spiders of Japan with Keys to the Families and Genera and Illustrations of the Species, H Ono (ed.). Tokai University Press. Kanagawa, Japan.
    4. National Institute of Biological Resources.2019. National Species List of Korea II, Vertebrates, Invertebrates, Protozoans. National Institute of Biological Resources. Incheon, Korea. pp. 412-443.
    5. World Spider Catalog.2020. World Spider Catalog. Version 21.5. Natural History Museum Bern, online at http://wsc.nmbe.ch.