Lacandodrilus Fragoso & Rojas, 2023

Jamieson, Barrie G. M. & Fragoso, Carlos, 2024, A monograph of the Oligochaete family Alluroididae, Zootaxa 5529 (3), pp. 401-435 : 426

Genus Lacandodrilus Fragoso & Rojas, 2023

Type species: Lacandodrilus Fragoso & Rojas 2023

Setae eight per segment, closely paired, ab ventral, cd dorsolateral, all setae simple, straight, with a node. Clitellum annular. Septal glands in perigonadial segments. Gizzard, oesophageal glands and typhlosole absent. Dorsal vessel simple. Long and contorted vascular commissures embedded within septal glands and located before XII. Holonephric, ovoidal nephridia covered by a granular peritoneal layer. Holandric, with testes and sperm funnels in X and XI and paired male pores in XIII. Male gonoducts intraparietal. Seminal vesicles long, extending several segments backwards within ovisacs. Genital paired lobular glands (prostates?) in XIII and XIV. Metagynous, with large ovaries in XIII and paired female pores in XIV, presetal to AB. Paired spermathecae before XI, without diverticula and with ventral pores. Segment XII lacking gonads.

Remarks: With the Alluroididae Lacandodrilus shares the pair of male pores and single pair of ovaries in XIII, presence of septal glands and (assumed) the single–layered clitellum. However, it differs in the absence of tubular or globular atria and the intraparietal nature of the male gonoducts; it also differs in the number of testes (holandric, two pairs in X and XI vs. proandric one pair in X or metandric–one pair in XI). Intraparietal male gonoducts also occur in Sparganophilidae (Jamieson 1971) .

Distribution. Chiapas, Lacandon tropical rainforest southeastern Mexico.