Oecobius hoffmannae Jiménez & Llinas, 2005

Alcántar-Valenzuela, Joel Jair, Chamé-Vázquez, David & Jiménez, María-Luisa, 2025, Four new species of the spider genus Oecobius Lucas, 1846 (Araneae: Oecobiidae) from northwestern Mexico, Zootaxa 5679 (4), pp. 501-520 : 512-514

Oecobius hoffmannae Jiménez & Llinas, 2005

Figs 41–50 , 70–72

Oecobius hoffmannae Jiménez & Llinas, 2005: 46 , figs 1–5 (male holotype from San José Comondú, and female paratype from San Isidro, Baja California Sur in Colección Nacional de Arácnidos , CNAN; not examined).

Material examined. MEXICO: Baja California Sur, Comondú, San Isidro-La Purísima (26.2008°N, 112.0483°W, 118 m), pitfall, G. Nieto leg., 26/VIII/2002, 1♂ (CARCIB-Ar-4766) ; same data as for preceding, except C. Palacios, C. Frieven leg., 26/X/2002, 2♂ 4♀ (CARCIB-Ar-4767) ; same data as for preceding, except 27/IX/2022, 5♂ 4♀ (CARCIB-Ar-4768) ; same data as for preceding, except C. Frieven leg., 11/ VI /2003, 1♂ (CARCIB-Ar-4770) ; same data as for preceding, except M. Correa leg., 16/ VI /2003, 1♂ (CARCIB-Ar-4772) ; same data as for preceding, except C. Palacios, I. Posada leg., 26/VIII/2002, 2♂ (CARCIB-Ar-4774) ; same data as for preceding, 1♂ (CARCIB- Ar-5317) ; same data as for preceding, except G. Nieto leg., 20/IX/2003, 1♂ (CARCIB-Ar-4776) ; same data as for preceding, except M. Correa leg., 16/ VI /2003, 1♀ (CARCIB-Ar-4777) ; same data as for preceding, except 26/ X/2002, 1♂ (CARCIB-Ar-4778) ; same data as for preceding, except 20/X/2003, 2♂ (CARCIB-Ar-4779) ; same data as for preceding, except I. Posada leg., 2♂ (CARCIB-Ar-4780) ; same data as for preceding, except C. Palacios, C. Frieven leg., 08/II/2003, 1♂ 1 juv. (CARCIB-Ar-4783) ; same data as for preceding, except C. Palacios, C. Frieven leg., 27/IX/2002, 1♂ 2♀ 1 juv. (CARCIB-Ar-4784) ; same data as for preceding, except M. Correa leg., 26/VIII/2002, 1♂ (CARCIB-Ar-4785) ; same data as for preceding, except C. Palacios, C. Frieven leg., 27/IX/2002, 2♀ 6 juvs (CARCIB-Ar-4786) ; same data as for preceding, 2♂ 2♀ (CARCIB-Ar-4788) ; same data as for preceding, except G. Nieto, A. Trujano leg., 14/XII/2002, 1♀ (CARCIB-Ar-4789) ; same data as for preceding, except M. Correa leg., 27/ IX/2002, 2♂ (CARCIB-Ar-4790) ; same data as for preceding, except C. Palacios, C. Frieven leg., 26/X/2002, 2♂ 2♀ (CARCIB-Ar-4791) ; same data as for preceding, except M. Correa leg., 06/IV/2003, 1♂ (CARCIB-Ar-4792) ; same data as for preceding, except C. Palacios, C. Frieven leg., 27/IX/2002, 8♂ 5♀ (CARCIB-Ar-4793) ; same data as for preceding, except C. Palacios leg., 16/ VI /2003, 1♂ (CARCIB-Ar-5318) ; same data as for preceding, except G. Nieto leg., 08/II/2003, 1♂ (CARCIB-Ar-4794) ; same data as for preceding, except C. Palacios, C. Frieven leg., 26/VIII/2002, 1♂ (CARCIB-Ar-4795) ; same data as for preceding, except I. Posada leg., 20/IX/2003, 2♂ (CARCIB- Ar-4798); San José de Comondú, Arroyo Comondú (26.0594°N, 111.8202°W, 295 m), pitfall, C. Frieven leg., 11/ X/2003, 1♂ (CARCIB-Ar-4769) ; same data as for preceding, except G. Nieto leg., 29/IX/2002, 1♂ (CARCIB-Ar- 4771) ; same data as for preceding, except M. Correa leg., 11/X/2003, 1♂ (CARCIB-Ar-4773) ; same data as for preceding, except I. Posada leg., 08/IV/2003, 1♂ 1 juv. (CARCIB-Ar-4775) ; same data as for preceding, except M. Correa leg., 11/X/2003, 1♂ 2♀ 1 juv. (CARCIB-Ar-4781) ; same data as for preceding, except I. Posada leg., 1♂ (CARCIB-Ar-4782) ; same data as for preceding, except C. Palacios, C. Frieven leg., 29/IX/2002, 1♂ 1♀ (CARCIB- Ar-4787) ; same data as for preceding, except unammed collector, 08/IV/2003, 1♂ (CARCIB-Ar-5319) ; same data as for preceding, except M. Correa leg., 11/X/2003, 1♂ 1 juv. (CARCIB-Ar-4796) ; same data as for preceding, except G. Nieto leg., 28/X/2002, 1♂ (CARCIB-Ar-4797); Loreto, San Basilio, 2 km of Rancho “Dagoberto” (26.3618°N, 111.4433°W, 17 m), manual collection, D. Chamé leg., 03/IX/2021, 1♂ (CARCIB-Ar-4765) .

Diagnosis (modified from Jiménez & Llinas 2005). Males of O. hoffmannae resemble those of O. culichi spec. nov. by having the radical apophysis and protrusion forming a C-shape concavity in prolateral view; however, O. hoffmannae possesses the radical apophysis about of the same length as terminal apophysis ( Figs 45, 47 , Jiménez & Llinas 2005: figs 2, 3; vs. shorter in O. culichi spec. nov., Figs 5, 7 ), and apically flattened, as seen ventrally ( Figs 46, 47 , Jiménez & Llinas 2005: fig. 3; vs. blunt in O. culichi spec. nov., Figs 6, 7 ). The females O. hoffmannae resemble those of O. culiacanensis Shear, 1970 by having a broad scape slightly longer than wide; however, in O. hoffmannae , the copulatory openings located at the apex of scape ( Figs 48, 49 , Jiménez & Llinas 2005: fig. 4; vs. opening into notches apically, Shear 1970: fig. 45), and the copulatory ducts which are contiguous at the scape base ( Figs 48, 49 , Jiménez & Llinas 2005: fig 4; vs. divergent at the scape base; see Shear 1970: fig. 45).

Complementary description. Male palp. In prolateral view, radical apophysis subrectangular, with a moderately pronounced proventral flange, apex flattened dorsoventrally, same apophysis looks somewhat bifid ventrally and retrolaterally; radical protrusion short, subtriangular and pointed; radical apophysis and protrusion conform a C-shape concavity ( Figs 45–47 ); terminal apophysis basally broad, distally blunt, same apophysis with a basal triangular process near embolus; conductor with two processes directed retroventrally and one protruding hyaline rim above the hyaline, long, and pointed median process, lower process short, subtriangular, heavily sclerotized, and blunt; embolus filiform directed retroventrad ( Figs 70–72 ).

Epigyne. Scape slightly longer than wide; attenuated apically but apex margin somewhat straight; copulatory openings small, situated on scape apex; posterior two-thirds of epigynal plate striated ( Fig. 48 ). Vulva . Copulatory ducts tubiform, slender, and long, directed anteriorly then arched laterally toward receptacles, ducts path sinuous before receptacles insertion; sclerotized capsules elongated, longitudinal, situated laterally at scape base; receptacles hyaline and globose; blind appendix reniform, restricted to posterior third of the epigynal length ( Fig. 50 ).

Remarks. Jiménez & Llinas (2005) confused a secondary basal process of terminal apophysis as the embolus (labeled “e” in Jiménez & Llinas 2005: fig. 3). Nevertheless, the embolus is filiform.

Natural history. Specimens of this species have been collected in xeric scrublands in Baja California Sur.Adult specimens have been found in February, April, June, August, September, and October ( Jiménez & Llinas 2005).

Distribution. The species is a narrow endemic known only from northern Baja California Sur (Comondú and Loreto municipalities), Mexico ( Fig. 76 ).

Figures

FIGURE 76. Distribution of Oecobius species based on records from the current paper, Shear (1970), and Jiménez & Llinas (2005).

FIGURES 41–50. Oecobius hoffmannae. 41. male habitus, dorsal; 42. same, ventral; 43. female habitus, dorsal; 44. same, ventral; 45. male palp, prolateral; 46. same, ventral; 47. same, retrolateral; 48. epigyne, ventral; 49. cleared epigyne, ventral; 50. same, dorsal. Scale bars 41–44: 1.0 mm; 45–47: 0.30 mm; 48–50: 0.10 mm. Abbreviations: BA—blind appendix; C— conductor; CD—copulatory ducts; CO—copulatory openings; E—embolus; FD—fertilization ducts; K—sclerotized capsule; R—receptacle; RA—radical apophysis; TA—terminal apophysis.

FIGURES 70–75. 70–72. Oecobius hoffmannae. 73–75. O. isolatoides. 70, 73. male palp, prolateral. 71, 74. Same, ventral. 72, 75. Same, retrolateral. Scale bars 70–75: 0.10 mm. The processes of the conductor are color-coded as follows: green for the subapical process, red for the median process, and blue for the subbasal process. Abbreviations: C—conductor; E—embolus; RA—radical apophysis; RP—radical protrusion; TA—terminal apophysis.

FIGURES 1–10. Oecobius culichi spec. nov. 1. male habitus, dorsal; 2. same, ventral; 3. female habitus, dorsal; 4. same, ventral; 5. male palp, prolateral; 6. same, ventral; 7. same, retrolateral; 8. epigyne, ventral; 9. cleared epigyne, ventral; 10. same, dorsal. Scale bars 1–4: 1.0 mm; 5–7: 0.30 mm; 8–10: 0.10 mm. Abbreviations: BA—blind appendix; C—conductor; CD—copulatory ducts; CO—copulatory openings; E—embolus; FD— fertilization ducts; K—sclerotized capsule; R—receptacle; RA—radical apophysis; TA—terminal apophysis.