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In previous studies, fifteen species of <i>Paratylenchus</i>, commonly known as pin nematodes, have been reported in Spain. These plant-parasitic nematodes are ectoparasites with a wide host range and global distribution. In this research, 27 populations from twelve <i>Paratylenchus</i> species from 18 municipalities in Spain were studied using morphological, morphometrical and molecular data. This integrative taxonomic approach allowed the identification of twelve species, four of them were considered new undescribed species and eight were already known described. The new species described here are <i>P. caravaquenus</i> sp. nov., <i>P. indalus</i> sp. nov., <i>P. pedrami</i> sp. nov. and <i>P. zurgenerus</i> sp. nov. As for the already known described species, five were considered as first reports for the country, specifically <i>P.</i><i>enigmaticus</i>, <i>P. hamatus</i>, <i>P. holdemani</i>, <i>P. israelensis</i>, and <i>P. veruculatus</i>, while <i>P. baldaccii</i>, <i>P. goodeyi</i> and <i>P. tenuicaudatus</i> had already been recorded in Spain. This study provides detail morphological and molecular data, including the D2-D3 expansion segments of 28S rRNA, ITS rRNA, and partial mitochondrial COI regions for the identification of different <i>Paratylenchus</i> species found in Spain. These results confirm the extraordinary cryptic diversity in Spain and with examples of morphostatic speciation within the genus <i>Paratylenchus</i>.