Taxonomy, biodiversity, and community structure of spiders (Arachnida: Araneae) in Mt. Guiting-Guiting, Sibuyan Island, the "Galapagos of Asia", Philippines

Author

Marilou B. Llavor, De La Salle University, Manila

Date of Publication

3-2019

Document Type

Dissertation

Degree Name

Doctor of Philosophy in Biology

Subject Categories

Biodiversity

College

College of Science

Department/Unit

Biology

Thesis Adviser

Alberto T. Barrion

Defense Panel Chair

Divina M. Amalin

Defense Panel Member

Jose Santos R. Carandang VI
Mary Jane C. Flores
Aimee Lynn A. Barrion - Dupo

Abstract/Summary

The spider fauna of Mount Guiting-Guiting surveyed in five monthsfrom November 2015 to March 2016 from its three environs, namely : Tampayan (site 1:50-100 masl), Layag (site 2: 300-400 masl), and Lumbang West (site 3:500-600 masl) were identified and classified. A key to the families and genera of most dominant family, Araneidae is provided. Pooled data showed a total of 434 spider individuals belonging to 112 species, 40 genera under 17 families represented the spider fauna of the three sites. Of this, 18 species [16% of total species] were discovered new to science. These are Araneus parangmitificus n. sp., Cyclosa lumbang n. sp., Milonia pilipina n. sp., Poltys sibuyan n. sp. and Poltys romblon n. sp. in Araneidae; Arctosa lumbang n. sp. in Lycosidae; Aetana lumbangensis n. sp. and Pholcus guitingguiting n. sp. in Pholcidae; Psechrus haguimit n. sp. in Psechridae; Heteropoda layag n. sp., Heteropoda haguimit n. sp. and Olios delunai n. sp. in Sparassidae; Leucauge guitingguiting n. sp., Leucauge bisaya n. sp., Leucauge lumbang n. sp., Leucauge sibuyan n. sp. and Mesida cajidiocan n. sp. in Tetragnathidae; and Philoponella kampana n. sp. in Uloboridae. Four new locality records for Romblon Island are established namely, Deliochus sp.Parawixia dehaani (Doleschall 1859), Oedignatha scrobiculata (Thorell, 1889) and Episinus sp.. The general trend in species diversity (H¹) is Lumbang West (H¹ =3.69) > Tampayan (H¹ = 3.35) > Layag (H¹ =3.23). A slightly different trend occurred at the generic and family level—Lumbang West (H¹ =2.81 and H¹ =1.69), respectively. Spider richness based on number of individuals (I), species (S) and families (F) was highest in Tampayan (I=196; S=50; F=9) > LumbangWeste (I=125; S= 61; F-13) > Layag (I=113; S=43; F=10). Spider diversity increased with increasing altitude except in a more disturbed Layag site. The spider potential diet composition across all sites is also diverse. It consisted of 10 insect orders, namely, Diptera, Hemiptera, Coleoptera, Lepidoptera, Hymenoptera, Orthoptera, Odonata, Blattodea, Ephemeroptera and Phasmatodea, and one each of Araneae, Acari, and Crustacea. The most preponderant diets are the Diptera (12 families), Hemiptera (9) and Araneae (9). Guildwise, the orbweavers were the most dominant followed by the foliage runners and sheet web builders. The ground runners and space webs guilds were the least dominant.

Abstract Format

html

Language

English

Format

Electronic

Accession Number

CDTG008255

Keywords

Spiders--Philippines--Babuyan Island

Recommended Citation

Llavor, M. B. (2019). Taxonomy, biodiversity, and community structure of spiders (Arachnida: Araneae) in Mt. Guiting-Guiting, Sibuyan Island, the "Galapagos of Asia", Philippines. Retrieved from https://animorepository.dlsu.edu.ph/etd_doctoral/1533

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Embargo Period

3-31-2025