Lacronia Strand 1942
Creators: name: Carvalho, Rafael N.
name: Kury, Adriano B.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Opiliones
Gonyleptidae
Lacronia

description: Lacronia Strand, 1942
Luederwaldtia Mello-Leitão 1923: 518 [junior homonym of Luederwaldtia Schmidt, 1922 (Hemiptera)]. Luederwaldtia originally in Pachylinae.
Luederwaldtia: Mello-Leitão 1926: 337, 1932: 166, 1935: 99; Roewer 1929: 218; Kästner 1937: 389; Soares & Soares 1954: 269; H. Soares 1966: 286; Muñoz-Cuevas 1973: 226.
Lacronia Strand 1942: 397 [available replacement name for Luederwaldtia Mello-Leitão, 1923].
Lacronia: Kury 2003a: 174, 2003b: 29; Kury & Orrico 2006: 148; Carvalho & Kury, 2023: 23.
Type species. Luederwaldtia serripes Mello-Leitão, 1923, by original designation.
Included species. Lacronia boraceae (B. Soares, 1942), Lacronia camboriu Kury, 2003, Lacronia ceci Kury & Orrico, 2006, Lacronia nigra (Mello-Leitão, 1923), Lacronia ricardoi Kury, 2003, Lacronia serripes (Mello-Leitão, 1923), Lacronia tenuis (Roewer, 1917) and Lacronia utaru sp. nov.
Diagnosis. As the inclusion of Lacronia utaru sp. nov. does not affect the generic diagnosis presented by Carvalho & Kury (2023a), it is repeated here without change. Lacronia resembles Discocyrtus s. str. in: a) stylus straight on the glans (Figs. 5A–B); b) apical portion of the stylus only as an undifferentiated extension of its stem (Figs. 5A–B); c) ventral process of the glans with the same diameter of the stylus (Fig. 5B); d) ocularium height (in lateral view) equals thrice or more the eyes diameter (Figs. 3C, 4B–C); e) Fe II–III with a retro-dorsal distal spur (Figs. 2A, 3A, 4D); f) Pa IV covered by acuminated tubercles on the dorsal side (Figs. 3D, 4G–H, J).
Lacronia can be differentiated from Discocyrtus s. str. by the following features: a) mesotergum area III on males with a pair of paramedian spines (a pair of subconical structures in L. ceci) (Figs. 3A, C–D, 4A–B, E) (in Discocyrtus it has a pair of paramedian domes); b) mesotergum area IV of the AS not invading the posterior border of the DS (area IV invading the posterior border of the dorsal scutum in L. boraceae) (Figs 2A, 3A, 4A) (in Discocyrtus only the median portion of the posterior border of the dorsal scutum penetrates area IV); c) Ti III mace-shaped (Figs. 2A–D, 3A–B, 4D) (in Discocyrtus it is tubular); d) Cx IV with acuminated tubercles on the prolateral surface (Fig. 4A) (in Discocyrtus they are blunt); e) Cx IV with a prodorsal apophysis crenated on the posterior portion (Figs. 3A–B, 4A, F–G) (in Discocyrtus the apophysis is smooth); f) Cx IV with prodorsal apophysis transversally arranged in relation to the body axis (Figs. 2A, 3A, 4A) (in Discocyrtus it is oblique); g) Tr IV subquadrangular-shaped (Figs. 3A–B, 4A, G–J) (in Discocyrtus it is rectangular); h) Fe IV substraight in dorsal view (Figs 2A–B, 3A–C, 4G–J) (in Discocyrtus it is arched).
Geographic distribution. BRAZIL: States of Paraná, Rio de Janeiro, Santa Catarina and São Paulo (Fig. 1).
description: Published as part of Carvalho, Rafael N. & Kury, Adriano B., 2024, Filling a geographic gap: a new species of genus Lacronia Strand, 1942 (Opiliones, Gonyleptidae) from southern Brazil, pp. 417-428 in Zootaxa 5496 (3) on pages 418-419, DOI: 10.11646/zootaxa.5496.3.7, http://zenodo.org/record/13346961