Damarchus Thorell 1891
Year: 2025
Type: other
Abstract: Damarchus Thorell, 1891 Type species. Damarchus workmani Thorell, 1891 from Singapore, by monotypy. Diagnosis. Differ from Spiroctenus by having the short procurved fovea. Differ from Homostola by the rastellum consisting of short or weak spines (several short blunt spines in Homostola). Similar to Atmetochilus but differ from Atmetochilus by having pairs of posterior sternal sigilla not centrally confluent (present in Atmetochilus). Description. Fovea short, U-shaped. Eyes on tubercle. ALE are largest (except D. montanus). No or few cuspules on labium. Maxillary serrula absent; ca. 30 cuspules on proximal anterior margin of maxillae in both sexes; in male, maxillary cuspules normally smaller than in female, incipient. Posterior sternal sigilla large; anterior and medial sigilla smaller. Females palpal tarsus of females with one or two spines; no spines on any leg tarsi of males or females. Males with one sigmoidal (S-shaped) row of teeth on all paired claws; females with 2 rows of teeth on all paired claws; female palp claw with one tooth row on promargin. Preening comb normally present on metatarsi III and IV. Cymbium without spines. Four spinnerets: PMS broad, short and straight; PLS long, apical segment as long as median segment, basal segment longest. Palpal bulb simple and pyriform; embolus relatively long. Distal tibia I of males with ventral spur and 1–3 megaspines. Spermathecae are divided into two lobes. Species included. D. montanus (Thorell, 1890), D. workmani Thorell, 1891, D. oatesi Thorell, 1895, D. assamensis Hirst, 1909, D. cavernicola Abraham, 1924, D. bifidus Gravely, 1935, D. dao Schwendinger and Hongpadharakiree, 2023, D. lanna Schwendinger and Hongpadharakiree, 2023, and D. pylorus Schwendinger and Hongpadharakiree, 2023.
Institutions: Chulalongkorn University, Hubei University
Language: English
Subfield: Genetics
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W7087987157
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